title:
Collaborative learning model with virtual team in ubiquitous learning
  environment using creative problem solving process

abstract:
  The purposes of this research study were: 1) to develop a Collaborative
Learning Model with Virtual Team in u-Learning Environment using Creative
Problem-solving Process(U-CCPS Model); 2) to evaluate a U-CCPS Model. The
research procedures were divided into two phases. The first phase was to
develop U-CCPS Model, and the second phase was to evaluate U-CCPS Model. The
sample group in this study consisted of five experts using purposive sampling.
Data were analyzed by arithmetic mean and standard deviation. The research
findings were as follows: The U-CCPS learning Model consisted of five
components as follows: 1) Input factors, 2) Process, 3) Control, 4) Output and
5) Feedback. The input factors consisted of four components as followed: 1)
Objectives of U-CCPS Model, 2) Roles of Instructors, 3) Roles of learners and
4) Design of learning media. The process consisted of two components as
followed: 1) Preparation before learning, and 2) Instructional management
process. The experts agree that a U-CCPS Model was highest suitability.


title:
Classification of Quadratic Differential Systems on $\mathbb{R}^{3}$
  Having a Semisimple Derivation with a one-Dimensional Kernel

abstract:
  The classification, up to a center-affinity, of the homogeneous quadratic
differential systems defined on $\mathbb{R}^{3}$ that have at least a
semisimple derivation with one-dimensional kernel, is achieved. It is proved
that there exist 35 families of affine equivalence classes of such systems.


title:
Ubiquitous Scaffold Learning Environment Using Problem-based Learning to
  Enhance Problem-solving Skills and Context Awareness

abstract:
  The purpose of this research is to 1) design of an Ubiquitous Scaffold
Learning Environment Using Problem-based Learning model to enhance
problem-solving skills and context awareness, and 2) evaluate the developed
model. The research procedures divide into two phases. The first phase is to
design of Ubiquitous Scaffold Learning Environment Using Problem-based Learning
model, and the second phase is to evaluate the developed model. The sample
group in this study consists of five experts selected by purposive sampling
method. Data were analyzed by arithmetic mean and standard deviation. The
research findings are as follows: 1. The developed model consist of three
components is 1) principles of ubiquitous learning environment (ULE),
problem-based learning with scaffolding in ULE, problem solving skill and
context awareness 2) objectives of the model are to enhance problem solving
skill and context awareness and 3) Process of the instructional model 2. The
experts agree Ubiquitous Scaffold Learning Environment Using Problem-based
Learning model model is high level of appropriateness.


title:
In-medium \eta' mass and \eta'N interaction in vacuum in the linear
  sigma model

abstract:
  We investigate the \eta'N two-body interaction in the context of the \eta'
meson mass modification in the nuclear medium. It has been argued in several
articles that the masses of \eta' and the other pseudoscalar mesons (\pi, K,
\eta) should degenerate in the chiral-symmetric phase. It is expected that the
reduction of the mass difference between eta and eta' would take place in the
nuclear matter if one assumes that the decrease of the quark condensate at the
normal nuclear density occurs with partial restoration of chiral symmetry. At
low density, the in-medium self-energy giving the mass modification by the
medium effect can be obtained by the \eta'N two-body T matrix. Thus, we also
estimate the \eta'N interaction strength in vacuum with the linear sigma model
which involves the effect of partial restoration of chiral symmetry. In the
view of the linear sigma model, we find that the \eta'N interaction is
attractive and generated through the sigma meson exchange.We expect that the
interaction is enough strong and for the existence of a bound state of the
\eta'N system.


title:
On the coefficients of an expansion of $(1+1/x)^x$ related to Carleman's
  inequality

abstract:
  In this note, we present new properties for a sequence arising in some
refinements of Carleman's inequality. Our results extend some results of Yang
[Approximations for constant e and their applications J. Math. Anal. Appl. 262
(2001) 651-659] and Alzer and Berg [some classes of completely monotonic
functions Ann. Acad. Sci. Fennicae 27(2002) 445-460].


title: Quantum hexatic order in two-dimensional dipolar and charged fluids

abstract:
  Recent advances in cold atom experimentation suggest that studies of quantum
two-dimensional melting of dipolar molecules, with dipoles aligned
perpendicular to ordering plane, may be on the horizon. An intriguing aspect of
this problem is that two-dimensional \emph{classical} aligned dipoles (already
studied in great detail in soft matter experiments on magnetic colloids) are
known to melt via a two-stage process, with an intermediate hexatic phase
separating the usual crystal and isotropic fluid phases. We estimate here the
effect of quantum fluctuations on this hexatic phase, for both dipolar systems
and charged Wigner crystals. Our approximate phase diagrams rely on a pair of
Lindemann criteria, suitably adapted to deal with effects of thermal
fluctuations in two dimensions. As part of our analysis, we determine the
phonon spectra of quantum particles on a triangular lattice interacting with
repulsive $1/r^3$ and $1/r$ potentials. A large softening of the transverse and
longitudinal phonon frequencies, due to both lattice effects and quantum
fluctuations, plays a significant role in our analysis. The hexatic phase is
predicted to survive down to very low temperatures.


title:
Integrative genomics analysis identifies pericentromeric regions of
  human chromosomes affecting patterns of inter-chromosomal interactions

abstract:
  Genome-wide analysis of distributions of densities of long-range interactions
of human chromosomes with each other, nucleoli, nuclear lamina, and binding
sites of chromatin state regulatory proteins, CTCF and STAT1, identifies
non-random highly correlated patterns of density distributions along the
chromosome length for all these features. Marked co-enrichments and clustering
of all these interactions are detected at discrete genomic regions on selected
chromosomes, which are located within pericentromeric heterochromatin and
designated Centromeric Regions of Interphase Chromatin Homing (CENTRICH).
CENTRICH manifest 199-716-fold higher density of inter-chromosomal binding
sites compared to genome-wide or chromosomal averages (p =
2.10E-101-1.08E-292). Sequence alignment analysis shows that CENTRICH represent
unique DNA sequences of 3.9 to 22.4 Kb in size which are: 1) associated with
nucleolus; 2) exhibit highly diverse set of DNA-bound chromatin state
regulators, including marked enrichment of CTCF and STAT1 binding sites; 3)
bind multiple intergenic disease-associated genomic loci (IDAGL) with
documented long-range enhancer activities and established links to increased
risk of developing epithelial malignancies and other common human disorders.
Using distances of SNP loci homing sites within genomic coordinates of CENTRICH
as a proxy of likelihood of disease-linked SNP loci binding to CENTRICH, we
demonstrate statistically significant correlations between the probability of
SNP loci binding to CENTRICH and GWAS-defined odds ratios of increased risk of
a disease for cancer, coronary artery disease, and type 2 diabetes. Our
analysis suggests that centromeric sequences and pericentromeric
heterochromatin may play an important role in human cells beyond the critical
functions in chromosome segregation.


title:
Possible medium effects on \eta-\pi^0 mixing and \eta \rightarrow \pi^0
  \pi^+ \pi^- decay in the asymmetric nuclear matter

abstract:
  It is known that the decay process \eta\rightarrow\pi^0\pi^+\pi^- in free
space is possible due to the isospin-symmetry breaking in Quantum
Chromodynamics (QCD), i.e., the small mass difference between u and d quarks:
The small width is intimately related with the mixing property between \eta and
\pi^0 mesons for which the chiral anomaly play a role. In asymmetric nuclear
matter such as heavy nuclei, isospin-symmetry breaking is large and it is
expected that the mixing property of the mesons changes significantly and the
above-mentioned decay width of the \eta created in such a medium may be
enhanced. This is an intriguing possibility to revealing a medium effect on a
hadron in nuclei. We apply the in-medium chiral perturbation theory to estimate
the modification of the \eta -\pi^0 mixing angle and the partial width of
\eta\pi^0\pi^+\pi^- in asymmetric nuclear matter as a function of the isospin
asymmetry. We find that these quantities can be greatly enhanced in
neutron-rich matter, which should be deteactable in experiment.


title: On a new harmonic heat flow with the reverse H\"older inequalities

abstract:
  This paper first proposes a new approximate scheme to construct a harmonic
heat flow $u$ between a parabolic cylinder to a sphere. Y.Chen and M.Struwe
have proved an existence and discussed a partial regularity of harmonic heat
flows by using Ginzburg-Landau heat flow and passing to the limit of a
parameter appeared in the equation. To construct a new harmonic heat flow, we
propose a Ginzburg-Landau type heat flow with a time-dependent parameter. and
we next establish the existence of a harmonic heat flow into spheres with (i) a
global energy inequality, (ii) a monotonicity for the scaled energy, (ii) a
reverse Poincare inequality. These inequalities (i), (ii) and (iii) improves
the Hausdorff dimensional estimates on it's singular set contrast to the former
results. I believe that inequalities (i), (ii) and (iii) allow us to analyze
how it behaves around its singularities.


title:
Intrinsic Localized Modes of a Classical Discrete Anisotropic Heisenberg
  Ferromagnetic Spin Chain

abstract:
  We report several exact intrinsic localized mode solutions of the classical
spin evolution equation of a one-dimensional anisotropic Heisenberg
ferromagnetic spin chain in terms of Jacobian elliptic functions. These include
one, two and three spin excitations. All these solutions have smooth
anticontinuum limits. Their linear stability and semiclassical quantization are
also discussed briefly.


title:
Global well-posedness and scattering for nonlinear Schr\"odinger
  equations with combined nonlinearities in the radial case

abstract:
  We consider the Cauchy problem for the nonlinear Schr\"odinger equation with
combined nonlinearities, one of which is defocusing mass-critical and the other
is focusing energy-critical or energy-subcritical. The threshold is given by
means of variational argument. We establish the profile decomposition in
$H^1(\Bbb R^d)$ and then utilize the concentration-compactness method to show
the global wellposedness and scattering versus blowup in $H^1(\Bbb R^d)$ below
the threshold for radial data when $d\leq4$.


title:
Electron-lattice energy exchange in metal nanoparticles. Quantum-kinetic
  and classical approaches

abstract:
  We obtained the electron-lattice energy transfer constant in metal
nanoparticles (MN), in quantum-mechanical and classical approach using the
deformation potential Bardeen-Shockley and found the changes of the
electron-lattice energy exchange (due to the finite size MN) in the quantum
kinetic approach caused by the discrete phonon spectrum. The condition when the
discrete phonon spectrum could be observed via the electron-phonon energy
exchange has been obtained. It was shown that the classical approach can be
generalized for metallic clusters with ballistic motion of electrons (electrons
move from one potential wall to another one). In this case, the
electron-lattice energy exchange is quasi-periodic depending on the size of the
cluster, and at certain cluster size, energy exchange is particularly size
sensitive.


title:
Integrable geodesic flows on 2-torus: formal solutions and variational
  principle

abstract:
  In this paper we study quasi-linear system of partial differential equations
which describes the existence of the polynomial in momenta first integral of
the integrable geodesic flow on 2-torus. We proved in [3] that this is a
semi-Hamiltonian system and we show here that the metric associated with the
system is a metric of Egorov type. We use this fact in order to prove that in
the case of integrals of degree three and four the system is in fact equivalent
to a single remarkable equation of order 3 and 4 respectively. Remarkably the
equation for the case of degree four has variational meaning: it is
Euler-Lagrange equation of a variational principle. Next we prove that this
equation for $n=4$ has formal double periodic solutions as a series in a small
parameter.


title: Exploration of Lorentz violation in neutral-kaon decay

abstract:
  The KLOE collaboration recently reported bounds on the directional dependence
of the lifetime of the short-lived neutral kaon $K^0_S$ with respect to the
dipole anisotropy of the cosmic microwave background. We interpret their
results in an effective field theory framework developed to probe the violation
of Lorentz invariance in the weak interaction and previously applied to
semileptonic processes, in particular $\beta$ decay. In this approach a general
Lorentz-violating tensor $\chi^{\mu\nu}$ is added to the standard propagator of
the $W$ boson. We perform an exploratory study of the prospects to search for
Lorentz violation in nonleptonic decays. For the kaon, we find that the
sensitivity to Lorentz violation is limited by the velocity of the kaons and by
the extent to which hadronic effects can be calculated. In a simple model we
derive the $K^0_S$ decay rate and calculate the asymmetry for the lifetime.
Using the KLOE data, limits on the values of $\chi^{\mu\nu}$ are determined.


title:
The Sherrington-Kirkpatrick spin glass model in the presence of a random
  field with a joint Gaussian probability density function for the exchange
  interactions and random fields

abstract:
  The magnetic systems with disorder form an important class of systems, which
are under intensive studies, since they reflect real systems. Such a class of
systems is the spin glass one, which combines randomness and frustration. The
Sherrington-Kirkpatrick Ising spin glass with random couplings in the presence
of a random magnetic field is investigated in detail within the framework of
the replica method. The two random variables (exchange integral interaction and
random magnetic field) are drawn from a joint Gaussian probability density
function characterized by a correlation coefficient $\rho$. The thermodynamic
properties and phase diagrams are studied with respect to the natural
parameters of both random components of the system contained in the probability
density. The de Almeida-Thouless line is explored as a function of temperature,
$\rho$ and other system parameters. The entropy for zero temperature as well as
for non zero temperatures is partly negative or positive, acquiring positive
branches as $h_{0}$ increases.


title: Strong asymptotic independence on Wiener chaos

abstract:
  Let $F_n = (F_{1,n}, ....,F_{d,n})$, $n\geq 1$, be a sequence of random
vectors such that, for every $j=1,...,d$, the random variable $F_{j,n}$ belongs
to a fixed Wiener chaos of a Gaussian field. We show that, as $n\to\infty$, the
components of $F_n$ are asymptotically independent if and only if ${\rm
Cov}(F_{i,n}^2,F_{j,n}^2)\to 0$ for every $i\neq j$. Our findings are based on
a novel inequality for vectors of multiple Wiener-It\^o integrals, and
represent a substantial refining of criteria for asymptotic independence in the
sense of moments recently established by Nourdin and Rosinski.


title:
Boolean Functions, Quantum Gates, Hamilton Operators, Spin Systems and
  Computer Algebra

abstract:
  We describe the construction of quantum gates (unitary operators) from
boolean functions and give a number of applications. Both non-reversible and
reversible boolean functions are considered. The construction of the Hamilton
operator for a quantum gate is also described with the Hamilton operator
expressed as spin system. Computer algebra implementations are provided.


title: Presence or absence of analytic structure in maximal ideal spaces

abstract:
  We study extensions of Wermer's maximality theorem to several complex
variables. We exhibit various smoothly embedded manifolds in complex Euclidean
space whose hulls are non-trivial but contain no analytic disks. We answer a
question posed by Lee Stout concerning the existence of analytic structure for
a uniform algebra whose maximal ideal space is a manifold.


title:
High speed data retrieval from national data center (ndc) reducing time
  and ignoring spelling error in search key based on double metaphone algorithm

abstract:
  Fast and efficient data management is one of the demanding technologies of
todays aspect. This paper proposes a system which makes the working procedures
of present manual system of storing and retrieving huge citizens information of
Bangladesh automated and increases its effectiveness. The implemented search
methodology is user friendly and efficient enough for high speed data retrieval
ignoring spelling error in the input keywords used for searching a particular
citizen. The main concern in this research is minimizing the total searching
time for a given keyword. This can be done if we can pre-establish the idea of
getting the data belonging to the searching keyword. The primary and secondary
key-code generated by the Double Metaphone Algorithm for each word is used to
establish that idea about the word. This algorithm is used for creating the map
of the original database, through which the keyword is matched against the
data.


title: Towards Ultra-Low-NoiseMoAu Transition Edge Sensors

abstract:
  We report initial measurements on our firstMoAu Transition Edge Sensors
(TESs). The TESs formed from a bilayer of 40 nm of Mo and 106 nm of Au showed
transition temperatures of about 320 mK, higher than identical TESs with a MoCu
bilayer which is consistent with a reduced electron transmission coefficient
between the bilayer films. We report measurements of thermal conductance in the
200 nm thick silicon nitride SiNx support structures at this temperature, TES
dynamic behaviour and current noise measurements.


title:
Affine homogeneous strictly pseudoconvex hypersurfaces of the type
  (1/2,0) in $\mathbb{C}^3$

abstract:
  In this paper we denote a type of affine homogeneous real hypersurface of
$\mathbb{C}^3$ and present a classification of homogeneous surfaces of the type
(1/2,0). The result was obtained by reducing the classification problem
mentioned above to the problem of solving a system of nonlinear (quadratic)
equations. Solutions of such system represent all the Lie algebras
corresponding to the homogeneous surfaces under consideration. Some details of
integration procedure are discussed for obtained algebras.


title: Kinetic Initial Conditions for Inflation

abstract:
  We consider the classical evolution of the inflaton field $\phi(t)$ and the
Hubble parameter $H(t)$ in homogeneous and isotropic single-field inflation
models. Under an extremely broad assumption, we show that the universe
generically emerges from an initial singularity in a non-inflating state where
the kinetic energy of the inflaton dominates its potential energy,
$\dot{\phi}^2 \gg V(\phi)$. In this kinetically-dominated regime, the dynamical
equations admit simple analytic solutions for $\phi(t)$ and $H(t)$, which are
independent of the form of $V(\phi)$. In such models, these analytic solutions
thus provide a simple way of setting the initial conditions from which to start
the (usually numerical) integration of the coupled equations of motion for
$\phi(t)$ and $H(t)$. We illustrate this procedure by applying it to
spatially-flat models with polynomial and exponential potentials, and determine
the background evolution in each case; generically $H(t)$ and $|\phi(t)|$ as
well as their time derivatives decrease during kinetic dominance until
$\dot{\phi}^2\sim V(\phi)$, marking the onset of a brief period of fast-roll
inflation prior to a slow roll phase. We also calculate the approximate
spectrum of scalar perturbations produced in each model and show that it
exhibits a generic damping of power on large scales. This may be relevant to
the apparent low-$\ell$ falloff in the CMB power spectrum.


title: Sampling Issues in Bibliometric Analysis

abstract:
  Bibliometricians face several issues when drawing and analyzing samples of
citation records for their research. Drawing samples that are too small may
make it difficult or impossible for studies to achieve their goals, while
drawing samples that are too large may drain resources that could be better
used for other purposes. This paper considers three common situations and
offers advice for dealing with each. First, an entire population of records is
available for an institution. We argue that, even though all records have been
collected, the use of inferential statistics, significance testing, and
confidence intervals is both common and desirable. Second, because of limited
resources or other factors, a sample of records needs to be drawn. We
demonstrate how power analyses can be used to determine in advance how large
the sample needs to be to achieve the study's goals. Third, the sample size may
already be determined, either because the data have already been collected or
because resources are limited. We show how power analyses can again be used to
determine how large effects need to be in order to find effects that are
statistically significant. Such information can then help bibliometricians to
develop reasonable expectations as to what their analysis can accomplish. While
we focus on issues of interest to bibliometricians, our recommendations and
procedures can easily be adapted for other fields of study.


title:
An Efficient monochromatic Electron Source designed for Inverse
  Photoemission Spectroscopy

abstract:
  A design of an efficient monochromatic electron source for Inverse
Photoemission Spectroscopy (IPES) apparatus is described. The electron source
consists of a BaO cathode, a focus electrostatic lens, a hemispherical
deflection monochromator (HDM), and a transfer electrostatic lens. The HDM
adopts a "slit-in and slit-out" structure and the degradation of first-order
focusing is corrected by two electrodes between the two hemispheres, which has
been investigated by both analytical methods and electron-ray tracing
simulations using SIMION program. Through the focus lens, the HDM, and the
standard five-element transfer lens, an optimal energy resolution is estimated
to be about 53 meV with a beam flux of 27uA. Pass energy (P.E.) of 10 eV and 5
eV are discussed, respectively.


title:
Random walks on quasi one dimensional lattices: large deviations and
  fluctuation theorems

abstract:
  Several stochastic processes modeling molecular motors on a linear track are
given by random walks (not necessarily Markovian) on quasi 1d lattices and
share a common regenerative structure. Analyzing this abstract common
structure, we derive information on the large fluctuations of the stochastic
process by proving large deviation principles for the first--passage times and
for the position. We focus our attention on the Gallavotti-Cohen-type symmetry
of the position rate function (fluctuation theorem), showing its equivalence
with the independence of suitable random variables. In the special case of
Markov random walks, we show that this symmetry is universal only inside a
suitable class of quasi 1d lattices.


title: Continuous selections of multivalued mappings

abstract:
  This survey covers in our opinion the most important results in the theory of
continuous selections of multivalued mappings (approximately) from 2002 through
2012. It extends and continues our previous such survey which appeared in
Recent Progress in General Topology, II, which was published in 2002. In
comparison, our present survey considers more restricted and specific areas of
mathematics. Note that we do not consider the theory of selectors (i.e.
continuous choices of elements from subsets of topological spaces) since this
topics is covered by another survey in this volume.


title: Assessing Wikipedia-Based Cross-Language Retrieval Models

abstract:
  This work compares concept models for cross-language retrieval: First, we
adapt probabilistic Latent Semantic Analysis (pLSA) for multilingual documents.
Experiments with different weighting schemes show that a weighting method
favoring documents of similar length in both language sides gives best results.
Considering that both monolingual and multilingual Latent Dirichlet Allocation
(LDA) behave alike when applied for such documents, we use a training corpus
built on Wikipedia where all documents are length-normalized and obtain
improvements over previously reported scores for LDA. Another focus of our work
is on model combination. For this end we include Explicit Semantic Analysis
(ESA) in the experiments. We observe that ESA is not competitive with LDA in a
query based retrieval task on CLEF 2000 data. The combination of machine
translation with concept models increased performance by 21.1% map in
comparison to machine translation alone. Machine translation relies on parallel
corpora, which may not be available for many language pairs. We further explore
how much cross-lingual information can be carried over by a specific
information source in Wikipedia, namely linked text. The best results are
obtained using a language modeling approach, entirely without information from
parallel corpora. The need for smoothing raises interesting questions on
soundness and efficiency. Link models capture only a certain kind of
information and suggest weighting schemes to emphasize particular words. For a
combined model, another interesting question is therefore how to integrate
different weighting schemes. Using a very simple combination scheme, we obtain
results that compare favorably to previously reported results on the CLEF 2000
dataset.


title: Design of coherent quantum observers for linear quantum systems

abstract:
  Quantum versions of control problems are often more difficult than their
classical counterparts because of the additional constraints imposed by quantum
dynamics. For example, the quantum LQG and quantum H infinity optimal control
problems remain open. To make further progress, new, systematic and tractable
methods need to be developed. This paper gives three algorithms for designing
coherent observers, i.e., quantum systems that are connected to a quantum plant
and their outputs provide information about the internal state of the plant.
Importantly, coherent observers avoid measurements of the plant outputs. We
compare our coherent observers with a classical (measurement-based) observer by
way of an example involving an optical cavity with thermal and vacuum noises as
inputs.


title: The generalized 3-edge-connectivity of lexicographic product graphs

abstract:
  The generalized $k$-edge-connectivity $\lambda_k(G)$ of a graph $G$ is a
generalization of the concept of edge-connectivity. The lexicographic product
of two graphs $G$ and $H$, denoted by $G\circ H$, is an important graph
product. In this paper, we mainly study the generalized 3-edge-connectivity of
$G \circ H$, and get upper and lower bounds of $\lambda_3(G \circ H)$.
Moreover, all bounds are sharp.


title: Dipolar Bose gas in highly anharmonic traps

abstract:
  By means of mean-field theory, we have studied the structure and excitation
spectrum of a purely dipolar Bose gas in pancake-shaped trap where the
confinement in the x-y plane is provided by a highly anharmonic potential
resulting in an almost uniform confinement in the plane. We show that the
stable condensates is characterized by marked radially structured density
profiles. The stability diagram is calculated by independently varying the
strength of the interaction and the trap geometry. By computing the Bogoliubov
excitation spectrum near the instability line we show that soft "angular"
rotons are responsible for the collapse of the system. The free expansion of
the cloud after the trap is released is also studied by means of time-dependent
calculations, showing that a prolate, cigar-shaped condensate is dynamically
stabilized during the expansion, which would otherwise collapse. Dipolar
condensates rotating with sufficiently high angular velocity show the formation
of multiply-quantized giant vortices, while the condensates acquire a
ring-shaped form.


title:
Kernel estimates for nonautonomous Kolmogorov equations with potential
  term

abstract:
  Using time dependent Lyapunov functions, we prove pointwise upper bounds for
the heat kernels of some nonautonomous Kolmogorov operators with possibly
unbounded drift and diffusion coefficients and a possibly unbounded potential
term.


title:
Comparative studies of Population Synthesis Models in the frame work of
  modified Str\"{o}mgren filters

abstract:
  Evolutionary models form a vital part of stellar population research to
understand their evolution, but despite their long history of development, they
often misrepresent and misinterpret the properties of stellar population
observed through broadband and spectroscopic measurements. With the growing
numbers of these synthesis models, model comparison becomes an important
analysis to choose a suitable model for upgrade. Along with the model
comparison, we reinvestigate the technique of modified Str\"omgren photometry
to measure reliable parameter-sensitive colours and estimate precise model ages
and metallicities. The assessment of Rakos/Schulz models with GALEV and
Worthey's Lick/IDS model find smaller colour variation: \Delta(uz-vz) $\leq$
0.056, \Delta(bz-yz) $\leq$ -0.05 and \Delta(vz-yz) $\leq$ 0.061. The study
conveys a good agreement of GALEV models with the modified Str\"omgren colours
but with poor UV model predictions with the observed globular cluster data,
while the spectroscopic models perform badly due to the use of older isochrone
and stellar spectral libraries with inaccurate/insufficient knowledge of
various stellar phases and their treatment. Overall, the assessment finds
modified Str\"omgren photometry well suited to study different types stellar
populations by mitigating the effects of the age-metallicity degeneracy.


title:
A global estimate for the Diederich--Fornaess index of weakly
  pseudoconvex domains

abstract:
  A uniform upper bound for the Diederich--Fornaess index is given for weakly
pseudoconvex domains whose Levi-form of the boundary vanishes in
$\ell$-directions everywhere.


title:
Elliptic Flow in Heavy-Ion Collisions at Energies $\sqrt{s_{NN}}=$
  2.7--39 GeV

abstract:
  The transverse-momentum integrated elliptic flow of charged particles at
midrapidity, $v_2$(charged), and that of identified hadrons from Au+Au
collisions are computed in a wide range of incident energies 2.7 GeV $\le
\sqrt{s_{NN}}\le$ 39 GeV. The simulations are performed within a three-fluid
model employing three different equations of state (EoS's): a purely hadronic
EoS and two versions of the EoS involving the deconfinement transition---a
first-order phase transition and a smooth crossover one. The present
simulations demonstrate low sensitivity of $v_2$(charged) to the EoS. All
considered scenarios equally well reproduce recent STAR data on $v_2$(charged)
for mid-central Au+Au collisions and properly describe its change of sign at
the incident energy decrease below $\sqrt{s_{NN}}\approx$ 3.5 GeV. The
predicted integrated elliptic flow of various species exhibits a stronger
dependence on the EoS. A noticeable sensitivity to the EoS is found for
anti-baryons and, to a lesser extent, for $K^-$ mesons. In particular, the
$v_2$ excitation functions of anti-baryons exhibit a non-monotonicity within
the deconfinement scenarios that was predicted by Kolb, Sollfrank and Heinz.
However, low multiplicities of anti-baryons at $\sqrt{s_{NN}}\leq$ 10 GeV
result in large fluctuations of their $v_2$ which may wash out this
non-monotonicity.


title:
Thermally activated switching of perpendicular magnet by spin-orbit spin
  torque

abstract:
  We theoretically investigate the threshold current for thermally activated
switching of a perpendicular magnet by spin-orbit spin torque. Based on the
Fokker-Planck equation, we obtain an analytic expression of the switching
current, in agreement with numerical result. We find that thermal energy
barrier exhibits a quasi-linear dependence on the current, resulting in an
almost linear dependence of switching current on the log-scaled current
pulse-width even below 10 ns. This is in stark contrast to standard spin torque
switching, where thermal energy barrier has a quadratic dependence on the
current and the switching current rapidly increases at short pulses. Our
results will serve as a guideline to design and interpret switching experiments
based on spin-orbit spin torque


title: On Various Confidence Intervals Post-Model-Selection

abstract:
  We compare several confidence intervals after model selection in the setting
recently studied by Berk et al. [Ann. Statist. 41 (2013) 802-837], where the
goal is to cover not the true parameter but a certain nonstandard quantity of
interest that depends on the selected model. In particular, we compare the
PoSI-intervals that are proposed in that reference with the "naive" confidence
interval, which is constructed as if the selected model were correct and fixed
a priori (thus ignoring the presence of model selection). Overall, we find that
the actual coverage probabilities of all these intervals deviate only
moderately from the desired nominal coverage probability. This finding is in
stark contrast to several papers in the existing literature, where the goal is
to cover the true parameter.


title: Non-Archimedean Group Algebras with Baer Reductions

abstract:
  Within the concept of a non-Archimedean operator algebra with the Baer
reduction (A. N. Kochubei, On some classes of non-Archimedean operator
algebras, Contemporary Math. 596 (2013), 133--148), we consider algebras of
operators on Banach spaces over non-Archimedean fields generated by regular
representations of discrete groups.


title: Spectral Operators of Matrices

abstract:
  The class of matrix optimization problems (MOPs) has been recognized in
recent years to be a powerful tool by researchers far beyond the optimization
community to model many important applications involving structured low rank
matrices. This trend can be credited to some extent to the exciting
developments in the emerging field of compressed sensing. The L\"owner
operator, which generates a matrix valued function by applying a
single-variable function to each of the singular values of a matrix, has played
an important role for a long time in solving matrix optimization problems.
However, the classical theory developed for L\"owner operators has become
inadequate in these recent applications. The main objective of this paper is to
provide some necessary theoretical foundations for designing numerical methods
for solving the MOP. This goal is achieved by introducing and conducting a
thorough study on a new class of matrix valued functions, coined as spectral
operators of matrices. Several fundamental properties of spectral operators,
including the well-definedness, continuity, directional differentiability,
Fr\'{e}chet-differentiability, locally Lipschitzian continuity, $\rho$-order
B(ouligand)-differentiability ($0<\rho\leq 1$), $\rho$-order G-semismooth
($0<\rho\leq 1$) and the characterization of Clarke's generalized Jacobian, are
systematically studied.


title: On the energetics of information exchange

abstract:
  We consider the thermodynamic properties of systems in contact with an
information source and focus on the consequences of energetic cost associated
with the exchange of information. To this end we introduce the model of a
thermal tape and derive a general bound for the efficiency of work extraction
for systems in contact with such a tape. Depending on the perspective, the
correlations between system and tape may either increase or reduce the
efficiency of the device. We illustrate our general results with two exactly
solvable models, one being an autonomous system, the other one involving
measurement and feedback. We also define an ideal tape limit in which our
findings reduce to known results.


title:
Mutual synchronization of two stacks of intrinsic Josephson junctions in
  cuprate superconductors

abstract:
  Certain high-$T_c$ cuprate superconductors, which naturally realize a stack
of Josephson junctions, thus can be used to generate electromagnetic waves in
the terahertz region. A plate-like single crystal with $10^4$ junctions without
cavity resonance was proposed to achieve strong radiation. For this purpose, it
is required to synchronize the Josephson plasma oscillation in all junctions.
In this work, we propose to use two stacks of junctions shunted in parallel to
achieve synchronization. The two stacks are mutually synchronized in the whole
IV curve, and there is a phase shift between the plasma oscillation in the two
stacks. The phase shift is nonzero when the number of junctions in different
stacks is the same, while it can be arbitrary when the number of junctions is
different. This phase shift can be tuned continuously by applying a magnetic
field when all the junctions are connected by superconducting wires.


title:
Functional stable limit theorems for quasi-efficient spectral
  covolatility estimators

abstract:
  We consider noisy non-synchronous discrete observations of a continuous
semimartingale with random volatility. Functional stable central limit theorems
are established under high-frequency asymptotics in three setups:
one-dimensional for the spectral estimator of integrated volatility, from
two-dimensional asynchronous observations for a bivariate spectral covolatility
estimator and multivariate for a local method of moments. The results
demonstrate that local adaptivity and smoothing noise dilution in the Fourier
domain facilitate substantial efficiency gains compared to previous approaches.
In particular, the derived asymptotic variances coincide with the benchmarks of
semiparametric Cram\'er-Rao lower bounds and the considered estimators are thus
asymptotically efficient in idealized sub-experiments. Feasible central limit
theorems allowing for confidence are provided.


title: The triviality problem for profinite completions

abstract:
  We prove that there is no algorithm that can determine whether or not a
finitely presented group has a non-trivial finite quotient; indeed, this
remains undecidable among the fundamental groups of compact, non-positively
curved square complexes. We deduce that many other properties of groups are
undecidable. For hyperbolic groups, there cannot exist algorithms to determine
largeness, the existence of a linear representation with infinite image (over
any infinite field), or the rank of the profinite completion.


title:
Discovery of Four Doubly Imaged Quasar Lenses from the Sloan Digital Sky
  Survey

abstract:
  We report the discovery of four doubly imaged quasar lenses. All the four
systems are selected as lensed quasar candidates from the Sloan Digital Sky
Survey data. We confirm their lensing hypothesis with additional imaging and
spectroscopic follow-up observations. The discovered lenses are SDSS J0743+2457
with the source redshift z_s=2.165, the lens redshift z_l=0.381, and the image
separation theta=1.034", SDSS J1128+2402 with z_s=1.608 and theta=0.844", SDSS
J1405+0959 with z_s=1.810, z_l~0.66, and theta=1.978", and SDSS J1515+1511 with
z_s=2.054, z_l=0.742, and theta=1.989". It is difficult to estimate the lens
redshift of SDSS J1128+2402 from the current data. Two of the four systems
(SDSS J1405+0959 and SDSS J1515+1511) are included in our final statistical
lens sample to derive constraints on dark energy and the evolution of massive
galaxies.


title: Colored scalars and the neutron electric dipole moment

abstract:
  We investigate new contributions to the neutron electric dipole moment
induced by colored scalars.
  As an example, we evaluate contributions coming from the color octet, weak
doublet scalar, accommodated within a modified Minimal Flavor Violating
framework. These flavor non-diagonal couplings of the color octet scalar might
account for the $A_{CP} (D^0 \to K^- K^+) - A_{CP} (D^0 \to \pi^+ \pi^-)$
asymmetry on the tree level. Using these charm asymmetry constrained couplings,
we calculate two-loop contributions to the neutron electric dipole moment and
find that they are of the same order as the experimental bound. We comment also
on contributions of higher dimensional operators to the neutron electric dipole
moment within this framework.


title:
Development of a NbN Deposition Process for Superconducting Quantum
  Sensors

abstract:
  We have carried out a detailed programme to explore the superconducting
characteristics of reactive DC-magnetron sputtered NbN. The basic principle is
to ignite a plasma using argon, and then to introduce a small additional
nitrogen flow to achieve the nitridation of a Nb target. Subsequent sputtering
leads to the deposition of NbN onto the host substrate. The characteristics of
a sputtered film depend on a number of parameters: argon pressure, nitrogen
flow rate and time-evolution profile, substrate material, etc. Crucially, the
hysteresis in the target voltage as a function of the nitrogen flow can be used
to provide a highly effective monitor of nitrogen consumption during the
reactive process. By studying these dependencies we have been able to achieve
highly reproducible film characteristics on sapphire, silicon dioxide on
silicon, and silicon nitride on silicon. Intrinsic film stress was minimised by
optimising the argon pressure, giving NbN films having Tc = 14.65 K. In the
paper, we report characteristics such as deposition rate, Residual Resistance
Ratio (RRR), film resistivity, transition temperature, and stress, as a
function of deposition conditions. In order to enhance our understanding of the
microwave properties of the films, we fabricated a wide range of microstrip NbN
resonators (half wavelength, quarter wavelength, ring resonators). In the
paper, we provide an illustrative result from this work showing a 2.1097 GHz
resonator having a Q of 15,962 at 3.3 K.


title:
A density functional theory study of FeAs comparing LDA+U, GGA+U and
  hybrid functionals

abstract:
  We use density functional theory within the local density approximation
(LDA), LDA+U, generalized gradient approximation (GGA), GGA+U, and
hybrid-functional methods to calculate the properties of iron monoarsenide.
FeAs, which forms in the MnP structure, is of current interest for potential
spintronic applications as well as being the parent compound for the
newly-identified pnictide superconductors. We compare the calculated
structural, magnetic and electronic properties obtained using the different
functionals to each other and to experiment, and investigate the origin of a
recently-reported magnetic spiral. Our results indicate the appropriateness or
otherwise of the various functionals for describing FeAs and the related
Fe-pnictide superconductors.


title:
An empirical Bayes testing procedure for detecting variants in analysis
  of next generation sequencing data

abstract:
  Because of the decreasing cost and high digital resolution, next-generation
sequencing (NGS) is expected to replace the traditional hybridization-based
microarray technology. For genetics study, the first-step analysis of NGS data
is often to identify genomic variants among sequenced samples. Several
statistical models and tests have been developed for variant calling in NGS
study. The existing approaches, however, are based on either conventional
Bayesian or frequentist methods, which are unable to address the multiplicity
and testing efficiency issues simultaneously. In this paper, we derive an
optimal empirical Bayes testing procedure to detect variants for NGS study. We
utilize the empirical Bayes technique to exploit the across-site information
among many testing sites in NGS data. We prove that our testing procedure is
valid and optimal in the sense of rejecting the maximum number of nonnulls
while the Bayesian false discovery rate is controlled at a given nominal level.
We show by both simulation studies and real data analysis that our testing
efficiency can be greatly enhanced over the existing frequentist approaches
that fail to pool and utilize information across the multiple testing sites.


title:
Sub-Gaussian heat kernel estimates and quasi Riesz transforms for $1\leq
  p\leq 2$

abstract:
  On a complete non-compact Riemannian manifold $M$, we prove that a so-called
quasi Riesz transform is always $L^p$ bounded for $1<p\leq 2$. If $M$ satisfies
the doubling volume property and the sub-Gaussian heat kernel estimate, we
prove that the quasi Riesz transform is also of weak type $(1,1)$.


title: A dynamical-system approach to mathematical programming

abstract:
  We explore how to build a vector field from the various functions involved in
a given mathematical program, and show that locally-stable equilibria of the
underlying dynamical system are precisely the local solutions of the
optimization problem. The general situation in which explicit inequality
constraints are present is especially interesting as the vector field has to be
discontinuous, and so one is led to consider discontinuous dynamical systems
and their equilibria.


title:
A Fabrication Route for Arrays of Ultra-low-Noise MoAu Transition Edge
  Sensors on Thin Silicon Nitride for Space Applications

abstract:
  We describe a process route to fabricate arrays of Ultra-low-Noise MoAu
Transition Edge Sensors (TESs). The low thermal conductance required for space
applications is achieved using 200 nm-thick Silicon Nitride (SiNx ) patterned
to form long-thin legs with widths of 2.1 {\mu}m. Using bilayers formed on SiNx
islands from films with 40 nm-thick Mo and Au thicknesses in the range 30 to
280 nm deposited by dc-sputtering in ultra-high vacuum we can obtain tunable
transition temperatures in the range 700 to 70 mK. The sensors use large-area
absorbers fabricated from high resistivity, thin-film beta-phase Ta to provide
impedance-matching to incident radiation. The absorbers are patterned to reduce
the heat capacity associated with the nitride support structure and include Au
thermalizing features to assist the heat flow into the TES. Arrays of 400
detectors at the pixel spacing required for the long-wavelength band of the
far-infrared instrument SAFARI are now being fabricated. Device yields
approaching 99% are achieved.


title:
How do heterogeneities in operating environments affect field failure
  predictions and test planning?

abstract:
  The main objective of accelerated life tests (ALTs) is to predict fraction
failings of products in the field. However, there are often discrepancies
between the predicted fraction failing from the lab testing data and that from
the field failure data, due to the yet unobserved heterogeneities in usage and
operating conditions. Most previous research on ALT planning and data analysis
ignores the discrepancies, resulting in inferior test plans and biased
predictions. In this paper we model the heterogeneous environments together
with their effects on the product failures as a frailty term to link the lab
failure time distribution and field failure time distribution of a product. We
show that in the presence of the heterogeneous operating conditions, the hazard
rate function of the field failure time distribution exhibits a range of
shapes. Statistical inference procedure for the frailty models is developed
when both the ALT data and the field failure data are available. Based on the
frailty models, optimal ALT plans aimed at predicting the field failure time
distribution are obtained. The developed methods are demonstrated through a
real life example.


title: Mathias forcing and combinatorial covering properties of filters

abstract:
  We give topological characterizations of filters $F$ on $w$ such that the
Mathias forcing $M_F$ adds no dominating reals or preserves ground model
unbounded families. This allows us to answer some questions of Brendle,
Guzm\'an, Hru\v{s}\'ak, Mart\'{\i}nez, Minami, and Tsaban.


title:
Electron Electric Dipole Moment and Hyperfine Interaction Constants for
  ThO

abstract:
  A recently implemented relativistic four-component configuration interaction
approach to study ${\cal{P}}$- and ${\cal{T}}$-odd interaction constants in
atoms and molecules is employed to determine the electron electric dipole
moment effective electric field in the $\Omega=1$ first excited state of the
ThO molecule. We obtain a value of $E_{\text{eff}} = 75.6 \left[\frac{\rm
GV}{\rm cm}\right]$ with an estimated error bar of $3\%$ and $10\%$ smaller
than a previously reported result [arXiv:1308.0414 [physics.atom-ph]]. Using
the same wavefunction model we obtain an excitation energy of $T_v^{\Omega=1} =
5329$ [\cm], in accord with the experimental value within $2\%$. In addition,
we report the implementation of the magnetic hyperfine interaction constant
$A_{||}$ as an expectation value, resulting in $A_{||} = -1335$ [MHz] for the
$\Omega=1$ state in ThO. The smaller effective electric field increases the
previously measured upper bound to the electron electric dipole moment
interaction constant [arXiv:1310.7534v2 [physics.atom-ph]] and thus mildly
mitigates constraints to possible extensions of the Standard Model of particle
physics.


title: Landau superfluids as non equilibrium stationary states

abstract:
  We define a superfluid state to be a nonequilibrium stationary state (NESS),
which, at zero temperature, satisfies certain \emph{metastability conditions},
which physically express that there should be a sufficiently small
energy-momentum transfer between the particles of the fluid and the
surroundings (e.g., pipe). It is shown that two models, the Girardeau model and
the Huang-Yang-Luttinger (HYL) model describe superfluids in this sense and,
moreover, that, in the case of the HYL model, the metastability condition is
directly related to Nozi\`{e}res' conjecture that, due to the repulsive
interaction, the condensate does not suffer fragmentation into two (or more)
parts, thereby assuring its quantum coherence. The models are rigorous examples
of NESS in which the system is not finite, but rather a many-body system.
\end{abstract}


title:
Palaeosymbiosis revealed by genomic fossils of Wolbachia in a
  strongyloidean nematode

abstract:
  Wolbachia are common endosymbionts of terrestrial arthropods, and are also
found in nematodes: the animal-parasitic filaria, and the plant-parasite
Radopholus similis. Lateral transfer of Wolbachia DNA to the host genome is
common. We generated a draft genome sequence for the strongyloidean nematode
parasite Dictyocaulus viviparus, the cattle lungworm. In the assembly, we
identified nearly 1 Mb of sequence with similarity to Wolbachia. The fragments
were unlikely to derive from a live Wolbachia infection: most were short, and
the genes were disabled through inactivating mutations. Many fragments were
co-assembled with definitively nematode-derived sequence. We found limited
evidence of expression of the Wolbachia-derived genes. The D. viviparus
Wolbachia genes were most similar to filarial strains, and strains from the
host-promiscuous clade F. We conclude that D. viviparus was infected by
Wolbachia in the past. Genome sequence based surveys are a powerful tool for
revealing the genome archaeology of infection and symbiosis.


title:
Rapid Steady State Convergence for Quantum Systems Using Time-Delayed
  Feedback Control

abstract:
  We propose a time-delayed feedback control scheme for open quantum systems
that can dramatically reduce the time to reach steady state. No measurement is
performed in the feedback loop, and we suggest a simple all-optical
implementation for a cavity QED system. We demonstrate the potential of the
scheme by applying it to a driven and dissipative Dicke model, as recently
realized in a quantum gas experiment. The time to reach steady state can then
reduced by two orders of magnitude for parameters taken from experiment, making
previously inaccessible long time attractors reachable within typical
experimental run times. The scheme also offers the possibility of slowing down
the dynamics, as well as qualitatively changing the phase diagram of the
corresponding physical system.


title:
Extension of Sparse Randomized Kaczmarz Algorithm for Multiple
  Measurement Vectors

abstract:
  The Kaczmarz algorithm is popular for iteratively solving an overdetermined
system of linear equations. The traditional Kaczmarz algorithm can approximate
the solution in few sweeps through the equations but a randomized version of
the Kaczmarz algorithm was shown to converge exponentially and independent of
number of equations. Recently an algorithm for finding sparse solution to a
linear system of equations has been proposed based on weighted randomized
Kaczmarz algorithm. These algorithms solves single measurement vector problem;
however there are applications were multiple-measurements are available. In
this work, the objective is to solve a multiple measurement vector problem with
common sparse support by modifying the randomized Kaczmarz algorithm. We have
also modeled the problem of face recognition from video as the multiple
measurement vector problem and solved using our proposed technique. We have
compared the proposed algorithm with state-of-art spectral projected gradient
algorithm for multiple measurement vectors on both real and synthetic datasets.
The Monte Carlo simulations confirms that our proposed algorithm have better
recovery and convergence rate than the MMV version of spectral projected
gradient algorithm under fairness constraints.


title: Metrizable images of the Sorgenfrey line

abstract:
  We give descriptions of metrizable topological spaces that are images of the
Sorgenfrey line under continuous maps of different types (open, closed,
quotient and others). To obtain this descriptions, we introduce the notion of a
Lusin pi-base, the Sorgenfrey line and the Baire space have Lusin pi-bases, and
if a space X has a Lusin pi-base, then for each nonempty Polish space Y, there
exists a continuous open map from X onto Y.


title: Higher Dimensional Discrete Cheeger Inequalities

abstract:
  For graphs there exists a strong connection between spectral and
combinatorial expansion properties. This is expressed, e.g., by the discrete
Cheeger inequality, the lower bound of which states that $\lambda(G) \leq
h(G)$, where $\lambda(G)$ is the second smallest eigenvalue of the Laplacian of
a graph $G$ and $h(G)$ is the Cheeger constant measuring the edge expansion of
$G$. We are interested in generalizations of expansion properties to finite
simplicial complexes of higher dimension (or uniform hypergraphs).
  Whereas higher dimensional Laplacians were introduced already in 1945 by
Eckmann, the generalization of edge expansion to simplicial complexes is not
straightforward. Recently, a topologically motivated notion analogous to edge
expansion that is based on $\mathbb{Z}_2$-cohomology was introduced by Gromov
and independently by Linial, Meshulam and Wallach. It is known that for this
generalization there is no higher dimensional analogue of the lower bound of
the Cheeger inequality. A different, combinatorially motivated generalization
of the Cheeger constant, denoted by $h(X)$, was studied by Parzanchevski,
Rosenthal and Tessler. They showed that indeed $\lambda(X) \leq h(X)$, where
$\lambda(X)$ is the smallest non-trivial eigenvalue of the ($(k-1)$-dimensional
upper) Laplacian, for the case of $k$-dimensional simplicial complexes $X$ with
complete $(k-1)$-skeleton.
  Whether this inequality also holds for $k$-dimensional complexes with
non-complete $(k-1)$-skeleton has been an open question. We give two proofs of
the inequality for arbitrary complexes. The proofs differ strongly in the
methods and structures employed, and each allows for a different kind of
additional strengthening of the original result.


title:
Non-Equilibrium Superconductivity in Kinetic Inductance Detectors for
  THz Photon Sensing

abstract:
  Low temperature Kinetic Inductance Detectors (KIDs) are attractive candidates
for producing quantumsensitive, arrayable sensors for astrophysical and other
precision measurement applications. The readout uses a low frequency probe
signal with quanta of energy well-below the threshold for pair-breaking in the
superconductor. We have calculated the detailed non-equilibrium quasiparticle
and phonon energy spectra generated by the probe signal of the KID when
operating well-below its superconducting transition temperature Tc within the
framework of the coupled kinetic equations described by Chang and Scalapino.[1]
At the lowest bath temperature studied Tb/Tc = 0.1 the quasiparticle
distributions can be driven far from equilibrium. In addition to the low
frequency probe signal we have incorporated a high frequency (~ 1 THz) source
signal well-above the pair-breaking threshold of the superconductor.
Calculations of source signal detection efficiency are discussed


abstract:
  Discussion of "Estimating the historical and future probabilities of large
terrorist events" by Aaron Clauset and Ryan Woodard [arXiv:1209.0089].


title: Quantifier Extensions of Multidimensional Sofic Shifts

abstract:
  We define a pair of simple combinatorial operations on subshifts, called
existential and universal extensions, and study their basic properties. We
prove that the existential extension of a sofic shift by another sofic shift is
always sofic, and the same holds for the universal extension in one dimension.
However, we also show by a construction that universal extensions of
two-dimensional sofic shifts may not be sofic, even if the subshift we extend
by is very simple.


title:
Normal phase and superconducting instability in attractive Hubbard
  model: the DMFT(NRG) study

abstract:
  We study the normal (non-superconducting) phase of attractive Hubbard model
within dynamical mean field theory (DMFT) using numerical renormalization group
(NRG) as impurity solver. Wide range of attractive potentials $U$ is
considered, from the weak-coupling limit, where superconducting instability is
well described by BCS approximation, up to the strong-coupling region, where
superconducting transition is described by Bose-condensation of compact Cooper
pairs, which are formed at temperatures much exceeding superconducting
transition temperature. We calculate density of states, spectral density and
optical conductivity in the normal phase for this wide range of $U$, including
the disorder effects. Also we present the results on superconducting
instability of the normal state dependence on the attraction strength $U$ and
the degree of disorder. Disorder influence on the critical temperature $T_c$ is
rather weak, suggesting in fact the validity of Anderson theorem, with the
account of the general widening of the conduction band due to disorder.


title: Homotopy properties of spaces of smooth functions on 2-torus

abstract:
  Let $f:T^2\to\mathbb{R}$ be a Morse function on a 2-torus, $\mathcal{S}(f)$
and $\mathcal{O}(f)$ be its stabilizer and orbit with respect to the right
action of the group $\mathcal{D}(T^2)$ of diffeomorphisms of $T^2$,
$\mathcal{D}_{\mathrm{id}}(T^2)$ be the identity path component of
$\mathcal{D}(T^2)$, and $\mathcal{S}'(f) = \mathcal{S}(f) \cap
\mathcal{D}_{\mathrm{id}}(T^2)$. We give sufficient conditions under which $$
\pi_1\mathcal{O}_f(f) \ \cong \ \pi_1\mathcal{D}(T^2) \times \pi_0
\mathcal{S}'(f) \ \equiv \ \mathbb{Z}^2 \times \pi_0 \mathcal{S}'(f).$$ In fact
this result holds for a larger class of smooth functions $f:T^2\to\mathbb{R}$
having the following property: for every critical point $z$ of $f$ the germ of
$f$ at $z$ is smothly equivalent to a homogeneous polynomial $\mathbb{R}^2\to
\mathbb{R}$ without multiple factors.


title:
Formation of filament-like structures in the pulsar magnetosphere and
  the short-term variability of pulsar emission

abstract:
  Magnetohydrodynamic (MHD) instabilities can play an important role in the
dynamics of the pulsar magnetosphere and can be responsible for the formation
of various structures. We consider the instability caused by a gradient of the
magnetic pressure which can occur in a non-neutral magnetospheric plasma. We
arguethat the pulsar magnetospheres are always unstable. The unstable
disturbances have a form of filaments directed along the magnetic field lines
with plasma motions being almost parallel (or anti-parallel) to the magnetic
field. The growth rate of instability is high and can reach a fraction of $ck$,
where $k$ is the wavevector of unstable disturbances. The instability can be
responsible for fluctuations of plasma and the short-term variability of pulsar
emission.


title:
Discussion of "Estimating the historical and future probabilities of
  large terrorist event" by Aaron Clauset and Ryan Woodard


title: Quasi PT-symmetry in passive photonic lattices

abstract:
  The concept of quasi-PT symmetry in optical wave guiding system is elaborated
by comparing the evolution dynamics of a PT-symmetric directional coupler and a
passive directional coupler. In particular we show that in the low loss regime,
apart for an overall exponentially damping factor that can be compensated via a
dynamical renormalization of the power flow in the system along the propagation
direction, the dynamics of the passive coupler fully reproduce the one of the
PT-symmetric system.


title:
Herschel Observations of Far-Infrared Cooling Lines in intermediate
  Redshift (Ultra)-luminous Infrared Galaxies

abstract:
  We report the first results from a spectroscopic survey of the [CII] 158um
line from a sample of intermediate redshift (0.2<z<0.8) (ultra)-luminous
infrared galaxies, (U)LIRGs (LIR>10^11.5 Lsun), using the SPIRE-Fourier
Transform Spectrometer (FTS) on board the Herschel Space Observatory. This is
the first survey of [CII] emission, an important tracer of star-formation, at a
redshift range where the star-formation rate density of the Universe increases
rapidly. We detect strong [CII] 158um line emission from over 80% of the
sample. We find that the [CII] line is luminous, in the range (0.8-4)x10^(-3)
of the far-infrared continuum luminosity of our sources, and appears to arise
from photodissociation regions on the surface of molecular clouds. The
L[CII]/LIR ratio in our intermediate redshift (U)LIRGs is on average ~10 times
larger than that of local ULIRGs. Furthermore, we find that the L[CII]/LIR and
L[CII]/LCO(1-0) ratios in our sample are similar to those of local normal
galaxies and high-z star-forming galaxies. ULIRGs at z~0.5 show many
similarities to the properties of local normal and high-z star forming
galaxies. Our findings strongly suggest that rapid evolution in the properties
of the star forming regions of luminous infrared galaxies is likely to have
occurred in the last 5 billion years.


title: Considerations on the Sp\"orer-diagram - torsional wave relationship

abstract:
  Studies on the earlier reported spatial correlations between magnetic field
distributions and the torsional wave have been substantially extended to the
period 1975-2009. The investigations are based on Debrecen sunspot data and
magnetic field data of Mount Wilson. The recently available data and
distributions seem to support the idea that the torsional wave may be caused by
flows around the toruses which result in Coriolis-deviations forward and
backward, establishing the prograde and retrograde belts.


title: Nonequilibrium thermal entanglement for three-spin chain

abstract:
  The dynamics of a chain of three spins coupled at both ends to separate
bosonic baths at different temperatures is studied. An exact analytical so-
lution of the master equation in the Born-Markov approximation for the reduced
density matrix of the chain is constructed. It is shown that for long times the
reduced density matrix converges to the non-equilibrium steady- state.
Dynamical and steady state properties of the concurrence between the first and
the last spin are studied.


title:
Discussion of "Estimating the historical and future probabilities of
  large terrorist events" by Aaron Clauset and Ryan Woodard


title: Lasso and equivalent quadratic penalized models

abstract:
  The least absolute shrinkage and selection operator (lasso) and ridge
regression produce usually different estimates although input, loss function
and parameterization of the penalty are identical. In this paper we look for
ridge and lasso models with identical solution set.
  It turns out, that the lasso model with shrink vector $\lambda$ and a
quadratic penalized model with shrink matrix as outer product of $\lambda$ with
itself are equivalent, in the sense that they have equal solutions. To achieve
this, we have to restrict the estimates to be positive. This doesn't limit the
area of application since we can easily decompose every estimate in a positive
and negative part. The resulting problem can be solved with a non negative
least square algorithm.
  Beside this quadratic penalized model, an augmented regression model with
positive bounded estimates is developed which is also equivalent to the lasso
model, but is probably faster to solve.


title:
Semi-infinite optimization with sums of exponentials via polynomial
  approximation

abstract:
  We propose a general method for optimization with semi-infinite constraints
that involve a linear combination of functions, focusing on the case of the
exponential function. Each function is lower and upper bounded on sub-intervals
by low-degree polynomials. Thus, the constraints can be approximated with
polynomial inequalities that can be implemented with linear matrix
inequalities. Convexity is preserved, but the problem has now a finite number
of constraints. We show how to take advantage of the properties of the
exponential function in order to build quickly accurate approximations. The
problem used for illustration is the least-squares fitting of a positive sum of
exponentials to an empirical density. When the exponents are given, the problem
is convex, but we also give a procedure for optimizing the exponents. Several
examples show that the method is flexible, accurate and gives better results
than other methods for the investigated problems.


title: Nonequilibrium thermal entanglement for simple qubit systems

abstract:
  The dynamics of simple qubit systems in a chain configuration coupled at both
ends to separate bosonic baths at different temperatures is studied. An exact
analytical solution of the master equation in the Born-Markov approximation for
the reduced density matrix of the qubit system is constructed. The unique
non-equilibrium stationary state for the long time behavior of the reduced
density matrix in obtained. Dynamical and steady state properties of the
concurrence between the first and the last spin are studied.


title: Supergravity-matter actions in three dimensions and Chern-Simons terms

abstract:
  We study off-shell N-extended Yang-Mills multiplets coupled to conformal
supergravity in three spacetime dimensions. Superform formulations are
presented for the non-Abelian Chern-Simons actions in the cases N=1, 2, 3, and
the corresponding component actions are explicitly worked out. Such a
Chern-Simons action does not exist for N=4. In the latter case, a superform
formulation is given for the BF term that describes the coupling of two Abelian
vector multiplets with self-dual and anti-self-dual superfield strengths
respectively. The superform results obtained are used to construct linear
multiplet action principles in the cases N=2, 3, 4. The N=3 and N=4 actions are
demonstrated to be universal in the sense that all known off-shell
supergravity-matter systems (with the exception of pure conformal supergravity)
may be described using such an action. Starting from the N=3 and N=4 Abelian
vector multiplets, we also construct composite O(2) multiplets which are
analogues of the four-dimensional construction of an N=2 reduced chiral scalar
engineered from the improved tensor multiplet. Using these composites, we
present the superfield equations of motion for N=3 and N=4 anti-de Sitter and
topologically massive supergravity theories. We also sketch the construction of
a large family of higher derivative couplings for N=3 and N=4 vector
multiplets.


title: The sum of divisors of a quadratic form

abstract:
  We study the sum of divisors of the quadratic form $m_1^2+m_2^2+m_3^2$. Let
$$S_3(X)=\sum_{1\le m_1,m_2,m_3\le X}\tau(m_1^2+m_2^2+m_3^2).$$ We obtain the
asymptotic formula $$S_3(X)=C_1X^3\log X+ C_2X^3+O(X^2\log^7 X),$$ where
$C_1,C_2$ are two constants. This improves upon the error term
$O_\varepsilon(X^{8/3+\varepsilon})$ obtained by Guo and Zhai.


title:
Sur les composantes connexes d'une famille d'espaces analytiques
  p-adiques

abstract:
  Let $X=\mathcal{M}(A)$ be an affinoid space and let $f,g \in A$. We study the
sets of connected components of the spaces defined by an inequality of the form
$|f|\le r|g|$, with $r\ge 0$. We prove that there exists a finite partition of
$\mathbb{R}_+$ into intervals where those sets are canonically in bijection and
that the bounds of those intervals belong to $\sqrt{\rho(A)}$.


title: Temporal Variations of Coriolis-turns in the Photosphere

abstract:
  Correlations have been studied between longitudinal and latitudinal shifts of
sunspot groups in the period 1986-1998. This study is based on the Debrecen
Photoheliographic Data (DPD). The latitudinal distribution of the correlation
values exhibits the expected Coriolis-pattern on the entire period:
negative/positive correlations in the northern/southern hemispheres, gradually
disappearing toward the equator. The yearly distributions, however, show an
interesting cycle dependence: after the unambiguous Coriolis patterns during
the growing phase of the cycle the latitudinal dependence of the correlations
gets ambiguous at the activity maximum. This may be related to the Gnevyshev
gap, the depression of the cycle time-profile at the maximum.


title: A numerical investigation of level sets of extremal Sobolev functions

abstract:
  In this paper we investigate the level sets of extremal Sobolev functions for
subcritical exponents p. We conjecture that as p increases the corresponding
extremal functions become more peaked, which we can measure by comparing their
distribution functions. Then we provide compelling numerical evidence for our
conjecture.


title:
Optimal Hedging for Fund & Insurance Managers with Partially Observable
  Investment Flows

abstract:
  All the financial practitioners are working in incomplete markets full of
unhedgeable risk-factors. Making the situation worse, they are only equipped
with the imperfect information on the relevant processes. In addition to the
market risk, fund and insurance managers have to be prepared for sudden and
possibly contagious changes in the investment flows from their clients so that
they can avoid the over- as well as under-hedging. In this work, the prices of
securities, the occurrences of insured events and (possibly a network of) the
investment flows are used to infer their drifts and intensities by a stochastic
filtering technique. We utilize the inferred information to provide the optimal
hedging strategy based on the mean-variance (or quadratic) risk criterion. A
BSDE approach allows a systematic derivation of the optimal strategy, which is
shown to be implementable by a set of simple ODEs and the standard Monte Carlo
simulation. The presented framework may also be useful for manufactures and
energy firms to install an efficient overlay of dynamic hedging by financial
derivatives to minimize the costs.


title: Connected graphs cospectral with a Friendship graph

abstract:
  Let $n$ be any positive integer, the friendship graph $F_n$ consist of $n$
edge-disjoint triangles that all of them meeting in one vertex. A graph $G$ is
called cospectral with a graph $H$ if their adjacency matrices have the same
eigenvalues. Recently in [http://arxiv.org/pdf/1310.6529v1.pdf] it is proved
that if $G$ is any graph cospectral with $F_n$ $(n\neq 16)$, then $G\cong F_n$.
In this note, we give a proof of special case of the latter: Any connected
graph cospectral with $F_n$ is isomorphic to $F_n$. Our proof is independent of
ones given in [http://arxiv.org/pdf/1310.6529v1.pdf] and the proofs are based
on our recent results given in [Trans. Com., 2 no. 4 (2013) 37-52.] Using an
upper bound for the largest eigenvalue of a connected graph given in [J.
Combinatorial Theory, Ser. B, 81 (2001) 177-183.].


abstract:
  Rejoinder of "Estimating the historical and future probabilities of large
terrorist events" by Aaron Clauset and Ryan Woodard [arXiv:1209.0089].


title: Raman scattering study of InAs nanowire under high pressure

abstract:
  The pressure dependent phonon modes of predominant wurtzite InAs nanowires
has been investigated in a diamond anvil cell under hydrostatic pressure up to
58 GPa. The TO and LO at Gamma point and other optical phonon frequencies
increase linearly while the LO TO splitting decreases with pressure. The
recorded Raman modes have been used to determine the mode Gruneisen parameters
and also the value of Borns transverse effective charge. The calculated Borns
transverse effective charge exhibits a linear reduction with increasing
pressure implying an increase in covalency of nanowires under compression. The
intensity of the Raman modes shows a strong enhancement as the energy of E1
band gap approaches the excitation energy, which has been discussed in terms of
resonant Raman scattering. An indication of structural phase transformation has
been observed above pressure 10.87 GPa. We propose this transformation may be
from wurtzite to rock salt phase although further experimental and theoretical
confirmations are needed.


title: $F$-Dugundji spaces, $F$-Milutin spaces and absolute $F$-valued retracts

abstract:
  For every functional functor $F:Comp\to Comp$ in the category $Comp$ of
compact Hausdorff spaces we define the notions of $F$-Dugundji and $F$-Milutin
spaces, generalizing the classical notions of a Dugundji and Milutin spaces. We
prove that the class of $F$-Dugundji spaces coincides with the class of
absolute $F$-valued retracts. Next, we show that for a monomorphic continuous
functor $F:Comp\to Comp$ admitting tensor products each Dugundji compact is an
absolute $F$-valued retract if and only if the doubleton $\{0,1\}$ is an
absolute $F$-valued retract if and only if some points $a\in F(\{0\})\subset
F(\{0,1\})$ and $b\in F(\{1\})\subset F(\{0,1\})$ can be linked by a continuous
path in $F(\{0,1\})$. We prove that for the functor $Lip_k$ of $k$-Lipschitz
functionals with $k<2$, each absolute $Lip_k$-valued retract is openly
generated. On the other hand the one-point compactification of any uncountable
discrete space is not openly generated but is an absolute $Lip_3$-valued
retract. More generally, each hereditarily paracompact scattered compact space
$X$ of finite scattered height $n$ is an absolute $Lip_k$-valued retract for
$k=2^{n+2}-1$.


title:
The outflows accelerated by the magnetic fields and radiation force of
  accretion disks

abstract:
  The inner region of a luminous accretion disk is radiation pressure
dominated. We estimate the surface temperature of a radiation pressure
dominated accretion disk, \Theta=(c_s/r\Omega_K)^2<<(H/r)^2, which is
significantly lower than that of a gas pressure dominated disk, \Theta (H/r)^2.
This means that the outflow can be launched magnetically from the photosphere
of the radiation pressure dominate disk only if the effective potential barrier
along the magnetic field line is extremely shallow or no potential barrier is
present. For the latter case, the slow sonic point in the outflow may probably
be in the disk, which leads to a slow circular dense flow above the disk. This
implies that hot gas (probably in the corona) is necessary for launching a jet
from the radiation pressure dominated disk, which provides a natural
explanation on the observational evidence that the relativistic jets are
related to hot plasma in some X-ray binaries and active galactic nuclei. We
investigate the outflows accelerated from the hot corona above the disk by the
magnetic field and radiation force of the accretion disk. We find that, with
the help of the radiation force, the mass loss rate in the outflow is high,
which leads to a slow outflow. This may be the reason why the jets in
radio-loud narrow-line Seyfert galaxies are in general mild relativistic
compared with those in blazars.


title: Small-world networks of optical fiber lattices

abstract:
  We use a simple dynamical model and explore coherent dynamics of wavepackets
in complex networks of optical fibers. We start from a symmetric lattice and
through the application of a Monte-Carlo criterion we introduce structural
disorder and deform the lattice into a small-world network regime. We
investigate in the latter both structural (correlation length) as well as
dynamical (diffusion exponent) properties and find that both exhibit a rapid
crossover from the ordered to the fully random regime. For a critical value of
the structural disorder parameter $\rho \approx 0.25$ transport changes from
ballistic to sub-diffusive due to the creation strongly connected local
clusters and channels of preferential transport in the small world regime.


title:
Electroluminescence from a polythiophene molecular wire suspended in a
  plasmonic scanning tunneling microscope junction

abstract:
  The electroluminescence of a polythiophene wire suspended between two
metallic electrodes is probed using a scanning tunneling microscope. Under
positive sample voltage, the spectral and voltage dependencies of the emitted
light are consistent with the fluorescence of the wire junction mediated by
localized plasmons. This emission is strongly attenuated for the opposite
polarity. Both emission mechanism and polarity dependence are similar to what
occurs in organic light emitting diodes (OLED) but at the level of a single
molecular wire.


title:
Testing the Clauser-Horne-Shimony-Holt inequality using observables with
  arbitrary spectrum

abstract:
  The Clauser-Horne-Shimony and Holt inequality applies when measurements with
binary outcomes are performed on physical systems under the assumption of local
realism. Testing such inequalities in the quantum realm usually involves either
measurements of two--valued quantum observables or pre-defining a context
dependent binning procedure. Here we establish the conditions to test the
Clauser-Horne-Shimony and Holt inequality using any quantum observable. Our
result applies to observables with an arbitrary spectrum and no prior knowledge
of their underlying Hilbert space's dimension is required. Finally, we
demonstrate the proposed general measurement strategy, that can be seen as
positive operator valued measurements performed on the system, using the
formalism of modular variables applied to the transverse degrees of freedom of
single photons.


title:
Bayesian shrinkage methods for partially observed data with many
  predictors

abstract:
  Motivated by the increasing use of and rapid changes in array technologies,
we consider the prediction problem of fitting a linear regression relating a
continuous outcome $Y$ to a large number of covariates $\mathbf {X}$, for
example, measurements from current, state-of-the-art technology. For most of
the samples, only the outcome $Y$ and surrogate covariates, $\mathbf {W}$, are
available. These surrogates may be data from prior studies using older
technologies. Owing to the dimension of the problem and the large fraction of
missing information, a critical issue is appropriate shrinkage of model
parameters for an optimal bias-variance trade-off. We discuss a variety of
fully Bayesian and Empirical Bayes algorithms which account for uncertainty in
the missing data and adaptively shrink parameter estimates for superior
prediction. These methods are evaluated via a comprehensive simulation study.
In addition, we apply our methods to a lung cancer data set, predicting
survival time ($Y$) using qRT-PCR ($\mathbf {X}$) and microarray ($\mathbf
{W}$) measurements.


title:
Delay-induced patterns in a two-dimensional lattice of coupled
  oscillators

abstract:
  We show how a variety of stable spatio-temporal periodic patterns can be
created in 2D-lattices of coupled oscillators with non-homogeneous coupling
delays. A "hybrid dispersion relation" is introduced, which allows studying the
stability of time-periodic patterns analytically in the limit of large delay.
The results are illustrated using the FitzHugh-Nagumo coupled neurons as well
as coupled limit cycle (Stuart-Landau) oscillators.


title:
Inference in $\alpha$-Brownian bridge based on Karhunen-Lo\`eve
  expansions

abstract:
  We study a simple decision problem on the scaling parameter in the
$\alpha$-Brownian bridge $X^{(\alpha)}$ on the interval $[0,1]$: given two
values $\alpha_0, \alpha_1 \geq 0$ with $\alpha_0 + \alpha_1 \geq 1$ and some
time $0 \leq T \leq 1$ we want to test $H_0: \alpha = \alpha_0$ vs. $H_1:
\alpha = \alpha_1$ based on the observation of $X^{(\alpha)}$ until time $T$.
The likelihood ratio can be written as a functional of a quadratic form
$\psi(X^{(\alpha)})$ of $X^{(\alpha)}$. In order to calculate the distribution
of $\psi(X^{(\alpha)})$ under the null hypothesis, we generalize the
Karhunen-Lo\`eve Theorem to positive finite measures on $[0,1]$ and compute the
Karhunen-Lo\`eve expansion of $X^{(\alpha)}$ under such a measure. Based on
this expansion, the distribution of $\psi(X^{(\alpha)})$ follows by Smirnov's
formula.


title: BPP: Large Graph Storage for Efficient Disk Based Processing

abstract:
  Processing very large graphs like social networks, biological and chemical
compounds is a challenging task. Distributed graph processing systems process
the billion-scale graphs efficiently but incur overheads of efficient
partitioning and distribution of the graph over a cluster of nodes. Distributed
processing also requires cluster management and fault tolerance. In order to
overcome these problems GraphChi was proposed recently. GraphChi significantly
outperformed all the representative distributed processing frameworks. Still,
we observe that GraphChi incurs some serious degradation in performance due to
1) high number of non-sequential I/Os for processing every chunk of graph; and
2) lack of true parallelism to process the graph. In this paper we propose a
simple yet powerful engine BiShard Parallel Processor (BPP) to efficiently
process billions-scale graphs on a single PC. We extend the storage structure
proposed by GraphChi and introduce a new processing model called BiShard
Parallel (BP). BP enables full CPU parallelism for processing the graph and
significantly reduces the number of non-sequential I/Os required to process
every chunk of the graph. Our experiments on real large graphs show that our
solution significantly outperforms GraphChi.


title:
Leptogenesis and $CP$ violation in $SU(5)$ models with lepton flavor
  mixing originating from the right-handed sector

abstract:
  We discuss neutrino masses and mixing in the context of seesaw type I models
with three right-handed Majorana neutrinos and an approximately diagonal Dirac
sector. This ansatz is motivated by the idea that the flavor structure in the
right-handed Majorana masses is responsible for the large mixing angles,
whereas the small mixing angle $\theta_{13}$ originates from the Dirac Yukawa
couplings in analogy to the quark sector. To obtain $\theta_{13} \approx 0.15$
we study a possible $SU(5)$ grand unified theory realization with a $U(1)
\times \mathbb{Z}'_2 \times \mathbb{Z}''_2 \times \mathbb{Z}'''_2$ flavor
symmetry and include a complex perturbation parameter in the Dirac mass matrix.
The consequences for $CP$ violating phases and effects on leptogenesis are
investigated.


title:
Impulsively Generated Linear and Non-linear Alfven Waves in the Coronal
  Funnels

abstract:
  We present simulation results of the impulsively generated linear and
non-linear Alfv\'en waves in the weakly curved coronal magnetic flux-tubes
(coronal funnels) and discuss their implications for the coronal heating and
solar wind acceleration. We solve numerically the time-dependent
magnetohydrodynamic (MHD) equations to obtain the temporal signatures of the
small (linear) and large-amplitude (non-linear) Alfv\'en waves in the model
atmosphere of expanding open magnetic field configuration (e.g., coronal
funnels) by considering a realistic temperature distribution. We compute the
maximum transversal velocity of both linear and non-linear Alfv\'en waves at
different heights in the coronal funnel, and study their response in the solar
corona during the time of their propagation. We infer that the pulse-driven
non-linear Alfv\'en waves may carry sufficient wave energy fluxes to heat the
coronal funnels and also to power the solar wind that originates in these
funnels. Our study of linear Alfv\'en waves show that they can contribute only
to the plasma dynamics and heating of the funnel-like magnetic flux-tubes
associated with the polar coronal holes.


title: GaAs Quantum Dot Thermometry Using Direct Transport and Charge Sensing

abstract:
  We present measurements of the electron temperature using gate defined
quantum dots formed in a GaAs 2D electron gas in both direct transport and
charge sensing mode. Decent agreement with the refrigerator temperature was
observed over a broad range of temperatures down to 10 mK. Upon cooling nuclear
demagnetization stages integrated into the sample wires below 1 mK, the device
electron temperature saturates, remaining close to 10 mK. The extreme
sensitivity of the thermometer to its environment as well as electronic noise
complicates temperature measurements but could potentially provide further
insight into the device characteristics. We discuss thermal coupling
mechanisms, address possible reasons for the temperature saturation and
delineate the prospects of further reducing the device electron temperature.


title:
An EMG study of the lip muscles during covert auditory verbal
  hallucinations in schizophrenia

abstract:
  Purpose: Auditory verbal hallucinations (AVHs) are speech perceptions in the
absence of a external stimulation. An influential theoretical account of AVHs
in schizophrenia claims that a deficit in inner speech monitoring would cause
the verbal thoughts of the patient to be perceived as external voices. The
account is based on a predictive control model, in which verbal self-monitoring
is implemented. The aim of this study was to examine lip muscle activity during
AVHs in schizophrenia patients, in order to check whether inner speech
occurred. Methods: Lip muscle activity was recorded during covert AVHs (without
articulation) and rest. Surface electromyography (EMG) was used on eleven
schizophrenia patients. Results: Our results show an increase in EMG activity
in the orbicularis oris inferior muscle, during covert AVHs relative to rest.
This increase is not due to general muscular tension since there was no
increase of muscular activity in the forearm muscle. Conclusion: This evidence
that AVHs might be self-generated inner speech is discussed in the framework of
a predictive control model. Further work is needed to better describe how the
inner speech monitoring dysfunction occurs and how inner speech is controlled
and monitored. This will help better understanding how AVHs occur.


title:
Angular momentum transport modeling: achievements of a gyrokinetic
  quasi-linear approach

abstract:
  QuaLiKiz, a model based on a local gyrokinetic eigenvalue solver is expanded
to include momentum flux modeling in addition to heat and particle fluxes.
Essential for accurate momentum flux predictions, the parallel asymmetrization
of the eigenfunctions is successfully recovered by an analytical fluid model.
This is tested against self-consistent gyrokinetic calculations and allows for
a correct prediction of the ExB shear impact on the saturated potential
amplitude by means of a mixing length rule. Hence, the effect of the ExB shear
is recovered on all the transport channels including the induced residual
stress. Including these additions, QuaLiKiz remains ~10 000 faster than
non-linear gyrokinetic codes allowing for comparisons with experiments without
resorting to high performance computing. The example is given of momentum pinch
calculations in NBI modulation experiments.


title: An index for Brouwer homeomorphisms and homotopy Brouwer theory

abstract:
  We use the homotopy Brouwer theory of Handel to define a Poincar{\'e} index
between two orbits for an orientation preserving fixed point free homeomorphism
of the plane. Furthermore, we prove that this index is almost additive.


title: Precession-driven flows in non-axisymmetric ellipsoids

abstract:
  We study the flow forced by precession in rigid non-axisymmetric ellipsoidal
containers. To do so, we revisit the inviscid and viscous analytical models
that have been previously developed for the spheroidal geometry by,
respectively, Poincar\'e (Bull. Astronomique, vol. XXVIII, 1910, pp. 1-36) and
Busse (J. Fluid Mech., vol. 33, 1968, pp. 739-751), and we report the first
numerical simulations of flows in such a geometry. In strong contrast with
axisymmetric spheroids, where the forced flow is systematically stationary in
the precessing frame, we show that the forced flow is unsteady and periodic.
Comparisons of the numerical simulations with the proposed theoretical model
show excellent agreement for both axisymmetric and non-axisymmetric containers.
Finally, since the studied configuration corresponds to a tidally locked
celestial body such as the Earth's Moon, we use our model to investigate the
challenging but planetary-relevant limit of very small Ekman numbers and the
particular case of our Moon.


title: Two- and three-cocycles for Laver tables

abstract:
  We determine all 2- and 3-cocycles for Laver tables, an infinite sequence of
finite structures obeying the left-selfdistributivity law; in particular, we
describe simple explicit bases. This provides a number of new positive braid
invariants and paves the way for further potential topological applications.
Incidentally, we establish and study a partial ordering on Laver tables given
by the right-divisibility relation.


title:
Extreme Infrared Variables from UKIDSS - I. A Concentration in Star
  Forming Regions

abstract:
  We present initial results of the first panoramic search for high-amplitude
near-infrared variability in the Galactic Plane. We analyse the widely
separated two-epoch K-band photometry in the 5th and 7th data releases of the
UKIDSS Galactic Plane Survey. We find 45 stars with \Delta K > 1 mag, including
2 previously known OH/IR stars and a Nova. Even though the mid-plane is not yet
included in the dataset, we find the majority (66%) of our sample to be within
known star forming regions (SFRs), with two large concentrations in the Serpens
OB2 association (11 stars) and the Cygnus-X complex (12 stars). Sources in SFRs
show spectral energy distributions (SEDs) that support classification as Young
Stellar Objects (YSOs). This indicates that YSOs dominate the Galactic
population of high amplitude infrared variable stars at low luminosities and
therefore likely dominate the total high amplitude population. Spectroscopic
follow up of the DR5 sample shows at least four stars with clear
characteristics of eruptive pre-main-sequence variables, two of which are
deeply embedded. Our results support the recent concept of eruptive variability
comprising a continuum of outburst events with different timescales and
luminosities, but triggered by a similar physical mechanism involving unsteady
accretion. Also, we find what appears to be one of the most variable classical
Be stars.


title:
A mathematical and numerical framework for ultrasonically-induced
  Lorentz force electrical impedance tomography

abstract:
  We provide a mathematical analysis and a numerical framework for Lorentz
force electrical conductivity imaging. Ultrasonic vibration of a tissue in the
presence of a static magnetic field induces an electrical current by the
Lorentz force. This current can be detected by electrodes placed around the
tissue; it is proportional to the velocity of the ultrasonic pulse, but depends
nonlinearly on the conductivity distribution. The imaging problem is to
reconstruct the conductivity distribution from measurements of the induced
current. To solve this nonlinear inverse problem, we first make use of a
virtual potential to relate explicitly the current measurements to the
conductivity distribution and the velocity of the ultrasonic pulse. Then, by
applying a Wiener filter to the measured data, we reduce the problem to imaging
the conductivity from an internal electric current density. We first introduce
an optimal control method for solving such a problem. A new direct
reconstruction scheme involving a partial differential equation is then
proposed based on viscosity-type regularization to a transport equation
satisfied by the current density field. We prove that solving such an equation
yields the true conductivity distribution as the regularization parameter
approaches zero. We also test both schemes numerically in the presence of
measurement noise, quantify their stability and resolution, and compare their
performance.


title:
Asymptotic Behavior of Gradient Flows Driven by Nonlocal Power Repulsion
  and Attraction Potentials in One Dimension

abstract:
  We study the long time behavior of the Wasserstein gradient flow for an
energy functional consisting of two components: particles are attracted to a
fixed profile $\omega$ by means of an interaction kernel
$\psi_a(z)=|z|^{q_a}$,and they repel each other by means of another kernel
$\psi_r(z)=|z|^{q_r}$. We focus on the case of one space dimension and assume
that $1\le q_r\le q_a\le 2$.
  Our main result is that the flow converges to an equilibrium if either
$q_r<q_a$ or $1\le q_r=q_a\le4/3$,and if the solution has the same (conserved)
mass as the reference state $\omega$. In the cases $q_r=1$ and $q_r=2$, we are
able to discuss the behavior for different masses as well, and we explicitly
identify the equilibrium state, which is independent of the initial condition.
Our proofs heavily use the inverse distribution function of the solution.


title: Mode-by-mode hydrodynamics: ideas and concepts

abstract:
  The main ideas, technical concepts and perspectives for a mode resolved
description of the hydrodynamical regime of relativistic heavy ion collisions
are discussed. A background-fluctuation splitting and a Bessel-Fourier
expansion for the fluctuating part of the hydrodynamical fields allows for a
complete characterization of initial conditions, the fluid dynamical
propagation of single modes, the study of interaction effects between modes,
the determination of the associated particle spectra and the generalization of
the whole program to event-by-event correlations and probability distributions.


title: Dielectric screening of surface states in a topological insulator

abstract:
  Hexagonal warping provides an anisotropy to the dispersion curves of the
helical Dirac fermions that exist at the surface of a topological insulator. A
sub-dominant quadratic in momentum term leads to an asymmetry between
conduction and valence band. A gap can also be opened through magnetic doping.
We show how these various modifications to the Dirac spectrum change the
polarization function of the surface states and employ our results to discuss
their effect on the plasmons. In the long wavelength limit, the plasmon
dispersion retains its square root dependence on its momentum,
$\boldsymbol{q}$, but its slope is modified and it can acquire a weak
dependence on the direction of $\boldsymbol{q}$. Further, we find the existence
of several plasmon branches, one which is damped for all values of
$\boldsymbol{q}$, and extract the plasmon scattering rate for a representative
case.


title: Kinetics of Laser-Assisted Carbon Nanotube Growth

abstract:
  Laser-assisted chemical vapour deposition (CVD) growth is an attractive
mask-less process for growing locally aligned carbon nanotubes (CNTs) in
selected places on temperature sensitive substrates. The nature of the
localized process results in fast carbon nanotube growth with high experimental
throughput. Here, we report on detailed investigation of growth kinetics
related to physical and chemical process characteristics. Specifically, the
growth kinetics is investigated by monitoring the dynamical changes of
reflected laser beam intensity during growth. Benefiting from the fast growth
and high experimental throughput, we investigate a wide range of experimental
conditions and propose several growth regimes. Rate-limiting steps are
determined using rate equations linked to the proposed growth regimes, which
are further characterized by Raman spectroscopy and Scanning Electron
Microscopy (SEM), therefore directly linking growth regimes to the structural
quality of the CNTs. Activation energies for the different regimes are found in
the range of 0.3 - 0.8 eV.


title:
Can Synergy in Triple-Helix Relations be Quantified? A Review of the
  Development of the Triple-Helix Indicator

abstract:
  Triple-Helix arrangements of bi- and trilateral relations can be considered
as adaptive eco-systems. During the last decade, we have further developed a
Triple-Helix indicator of synergy as reduction of uncertainty in niches that
can be shaped among three or more distributions. Reduction of uncertainty can
be generated in correlations among distributions of relations, but this
(next-order) effect can be counterbalanced by uncertainty generated in the
relations. We first explain the indicator, and then review possible results
when this indicator is applied to (i) co-author networks of academic,
industrial, and governmental authors and (ii) synergies in the distributions of
firms over geographical addresses, technological classes, and industrial-size
classes for a number of nations. Co-variation is then considered as a measure
of relationship. The balance between globalizing and localizing dynamics can be
quantified. Too much synergy locally can also be considered as lock-in.
Tendencies are different for the globalizing knowledge dynamics versus locally
retaining wealth from knowledge in industrial innovations.