title:
The Ultraviolet Structure of Half-Maximal Supergravity with Matter
  Multiplets at Two and Three Loops

abstract:
  Using the duality between color and kinematics, we construct the two- and
three-loop amplitudes of half-maximal supergravity with matter multiplets and
show that new divergences occur in D=4 and D=5. Bossard, Howe and Stelle have
recently conjectured the existence of 16-supercharge off-shell harmonic
superspaces in order to explain the ultraviolet finiteness of pure half-maximal
supergravity with no matter multiplets in D=4 at three loops and in D=5 at two
loops. By assuming the required superspace exists in D=5, they argued that no
new divergences should occur at two loops even with the addition of
abelian-vector matter multiplets. Up to possible issues with the SL(2,R) global
anomaly of the theory, they reached a similar conclusion in D=4 for two and
three loops. The divergences we find contradict these predictions based on the
existence of the desired off-shell superspaces. Furthermore, our D=4 results
are incompatible with the new divergences being due to the anomaly. We find
that the two-loop divergences of half-maximal supergravity are directly
controlled by the divergences appearing in ordinary nonsupersymmetric
Yang-Mills theory coupled to scalars, explaining why half-maximal supergravity
develops new divergences when matter multiplets are added. We also provide a
list of one- and two-loop counterterms that should be helpful for constraining
any future potential explanations of the observed vanishings of divergences in
pure half-maximal supergravity.


title: Link Patterns and the Catalan Tree

abstract:
  We demonstrate that a natural construction based on the two notions of
insertion of a strand and finding the preimages of Temperley-Lieb algebra
generators give an inductive means to generate all link patterns of a given
number of strands. It is shown that the structure of the Catalan tree (as
defined by Julian West) arises in the process of this induction, and that it
can be exploited to give some refined enumerations of link patterns.


title:
Recurrence or transience of random walks on random graphs generated by
  point processes in $\mathbb{R}^d$

abstract:
  We consider random walks associated with conductances on Delaunay
triangulations, Gabriel graphs and skeletons of Voronoi tilings which are
generated by point processes in $\mathbb{R}^d$. Under suitable assumptions on
point processes and conductances, we show that, for almost any realization of
the point process, these random walks are recurrent if $d=2$ and transient if
$d\geq 3$. These results hold for a large variety of point processes including
Poisson point processes, Mat{\'e}rn cluster and Mat{\'e}rn hardcore processes
which have clustering or repulsive properties. In order to prove them, we state
general criteria for recurrence or almost sure transience which apply to random
graphs embedded in $\mathbb{R}^d$.


title: Reducing the debt : is it optimal to outsource an investment?

abstract:
  We deal with the problem of outsourcing the debt for a big investment,
according two situations: either the firm outsources both the investment (and
the associated debt) and the exploitation to a private consortium, or the firm
supports the debt and the investment but outsources the exploitation. We prove
the existence of Stackelberg and Nash equilibria between the firm and the
private consortium, in both situations. We compare the benefits of these
contracts. We conclude with a study of what happens in case of incomplete
information, in the sense that the risk aversion coefficient of each partner
may be unknown by the other partner.


title: Higher order Schrodinger and Hartree-Fock equations

abstract:
  The domain of validity of the higher-order Schrodinger equations is analyzed
for harmonic-oscillator and Coulomb potentials as typical examples. Then the
Cauchy theory for higher-order Hartree-Fock equations with bounded and Coulomb
potentials is developed. Finally, the existence of associated ground states for
the odd-order equations is proved. This renders these quantum equations
relevant for physics.


title: The Static String

abstract:
  In this article the quantum fluctuation of a rigid and static string is
reported to be identical to a free quantum particle. Solutions similar to this
static string have already been found in the semi-classical quantizaton of
pulsating strings, and our results show that the semi-classical quantization of
pulsating strings is, in some cases, a perturbation of static strings. We also
interpret the energy of the static string as a lower bound for the pulsating
string and speculate about a description of quantum mechanics in terms of
semi-classical string theory.


title:
Normality of the twistor space of a $5$-manifold with a
  $SO(3)$-structure

abstract:
  A manifold with an irreducible $SO(3)$-structure is a $5$-manifold $M$ whose
structure group can be reduced to the group $SO(3)$, non-standardly imbedded in
$SO(5)$. The study of such manifolds has been initiated by M. Bobie\'nski and
P. Nurowski who, in particular, have shown that one can define four
$CR$-structures on a twistor-like $7$-dimensional space associated to $M$. In
the present paper it is observed that these $CR$-structures are induced by
almost contact metric structures. The purpose of the paper is to study the
problem of normality of these structures. The main result gives necessary and
sufficient condition for normality in geometric terms of the base manifold $M$.
Examples illustrating this result are presented at the end of the paper.


title: Repetition-free longest common subsequence of random sequences

abstract:
  A repetition free Longest Common Subsequence (LCS) of two sequences x and y
is an LCS of x and y where each symbol may appear at most once. Let R denote
the length of a repetition free LCS of two sequences of n symbols each one
chosen randomly, uniformly, and independently over a k-ary alphabet. We study
the asymptotic, in n and k, behavior of R and establish that there are three
distinct regimes, depending on the relative speed of growth of n and k. For
each regime we establish the limiting behavior of R. In fact, we do more, since
we actually establish tail bounds for large deviations of R from its limiting
behavior.
  Our study is motivated by the so called exemplar model proposed by Sankoff
(1999) and the related similarity measure introduced by Adi et al. (2007). A
natural question that arises in this context, which as we show is related to
long standing open problems in the area of probabilistic combinatorics, is to
understand the asymptotic, in n and k, behavior of parameter R.


title:
Analytical determination of the two-body gravitational interaction
  potential at the 4th post-Newtonian approximation

abstract:
  We complete the analytical determination, at the 4th post-Newtonian
approximation, of the main radial potential describing the gravitational
interaction of two bodies within the effective one-body formalism. The (non
logarithmic) coefficient a_5 (nu) measuring this 4th post-Newtonian interaction
potential is found to be linear in the symmetric mass ratio nu. Its
nu-independent part a_5 (0) is obtained by an analytical gravitational
self-force calculation that unambiguously resolves the formal infrared
divergencies which currently impede its direct post-Newtonian calculation. Its
nu-linear part a_5 (nu) - a_5 (0) is deduced from recent results of Jaranowski
and Sch\"afer, and is found to be significantly negative.


title: A remarkable sample of new symbiotic stars towards the Galactic Bulge

abstract:
  Symbiotic stars are the longest orbital period interacting binaries, where
nova-like outbursts are generated by the accretion of a high mass loss rate red
giant wind onto a white dwarf companion. Long-term photometric monitoring
surveys such as OGLE and MACHO are ideal platforms to identify nova-like events
in symbiotic stars, however there are only a handful of known systems within
the small footprint of these surveys. We introduce a systematic Halpha emission
line object survey for new symbiotic stars covering 35 deg^2 towards the
Galactic Bulge that combines deep 2dF/AAOmega spectroscopy with OGLE and MACHO
photometry. This powerful combination has uncovered nearly two dozen new
symbiotic stars, more than a dozen probable symbiotic stars, and several other
unusual Halpha emission line stars. While we don't find any nova-like activity,
the lightcurves do exhibit semi-regular and Mira pulsations, orbital variations
and slower changes due to dust. Here we introduce a few of the new symbiotics,
including H1-45, only the fourth known carbon symbiotic Mira. This remarkable
discovery may be the first luminous carbon star belonging to the Galactic
Bulge, according to its period-luminosity relation distance of 6.2+-1.4 kpc,
potentially shedding new light on the puzzling lack of luminous carbon stars in
the Bulge. We also present two old novae captured in the nebular phase,
complementing other surveys to better characterise the old nova population.


title: Parallelizing Gaussian Process Calculations in R

abstract:
  We consider parallel computation for Gaussian process calculations to
overcome computational and memory constraints on the size of datasets that can
be analyzed. Using a hybrid parallelization approach that uses both threading
(shared memory) and message-passing (distributed memory), we implement the core
linear algebra operations used in spatial statistics and Gaussian process
regression in an R package called bigGP that relies on C and MPI. The approach
divides the matrix into blocks such that the computational load is balanced
across processes while communication between processes is limited. The package
provides an API enabling R programmers to implement Gaussian process-based
methods by using the distributed linear algebra operations without any C or MPI
coding. We illustrate the approach and software by analyzing an astrophysics
dataset with n=67,275 observations.


title: Virtually free pro-p products

abstract:
  It is shown that a finitely generated pro-p group G which is a virtually free
pro-p product splits either as a free pro-p product with amalgamation or as a
pro-p HNN-extension over a finite p-group. More precisely, G is the pro-p
fundamental group of a finite graph of finitely generated pro-p groups with
finite edge groups. This generalizes previous results of W. Herfort and the
second author (cf. [2]).


title:
Stability of the determination of a coefficient for the wave equation in
  an infinite wave guide

abstract:
  We consider the stability in the inverse problem consisting in the
determination of an electric potential $q$, appearing in a Dirichlet
initial-boundary value problem for the wave equation $\partial_t^2u-\Delta
u+q(x)u=0$ in an unbounded wave guide $\Omega=\omega\times\mathbb R$ with
$\omega$ a bounded smooth domain of $\mathbb R^2$, from boundary observations.
The observation is given by the Dirichlet to Neumann map associated to a wave
equation. We prove a H\"older stability estimate in the determination of $q$
from the Dirichlet to Neumann map. Moreover, provided that the gap between two
electric potentials rich its maximum in a fixed bounded subset of
$\bar{\Omega}$, we extend this result to the same inverse problem with
measurements on a bounded subset of the lateral boundary
$(0,T)\times\partial\Omega$.


title:
From microscopic theory to macroscopic theory: a systematic study on
  static modeling for liquid crystals

abstract:
  In this paper, we propose a systematic way of liquid crystal modeling to
build connection between microscopic theory and macroscopic theory. A new
Q-tensor theory based on Onsager's molecular theory which leads to liquid
crystals with certain shape has been proposed. Making uniaxial assumption, we
can recover the Oseen-Frank theory from the derived $Q$-tensor theory, and the
Oseen-Frank model coefficients can be examined. In addition, the smectic-A
phase can also be characterized by the derived macroscopic model.


title: Extending Sitemaps for ResourceSync

abstract:
  The documents used in the ResourceSync synchronization framework are based on
the widely adopted document format defined by the Sitemap protocol. In order to
address requirements of the framework, extensions to the Sitemap format were
necessary. This short paper describes the concerns we had about introducing
such extensions, the tests we did to evaluate their validity, and aspects of
the framework to address them.


title:
Guaranteed Recovery of Planted Cliques and Dense Subgraphs by Convex
  Relaxation

abstract:
  We consider the problem of identifying the densest k-node subgraph in a given
graph. We write this problem as an instance of rank-constrained cardinality
minimization and then relax using the nuclear and 11 norms. Although the
original combinatorial problem is NP-hard, we show that the densest k-subgraph
can be recovered from the solution of our convex relaxation for certain program
inputs. In particular, we establish exact recovery in the case that the input
graph contains a single planted clique plus noise in the form of corrupted
adjacency relationships. We consider two constructions for this noise. In the
first, noise is introduced by an adversary deterministically deleting edges
within the planted clique and placing diversionary edges. In the second, these
edge corruptions are performed at random. Analogous recovery guarantees for
identifying the densest subgraph of fixed size in a bipartite graph are also
established, and results of numerical simulations for randomly generated graphs
are included to demonstrate the efficacy of our algorithm.


title: Galam's bottom-up hierarchical system and public debate model revisited

abstract:
  This article is concerned with the bottom-up hierarchical system and public
debate model proposed by Galam, as well as a spatial version of the public
debate model. In all three models, there is a population of individuals who are
characterized by one of two competing opinions, say opinion -1 and opinion +1.
This population is further divided into groups of common size s. In the
bottom-up hierarchical system, each group elects a representative candidate,
whereas in the other two models, all the members of each group discuss at
random times until they reach a consensus. At each election/discussion, the
winning opinion is chosen according to Galam's majority rule: the opinion with
the majority of representants wins when there is a strict majority while one
opinion, say opinion -1, is chosen by default in case of a tie. For the public
debate models, we also consider the following natural updating rule that we
shall call proportional rule: the winning opinion is chosen at random with a
probability equal to the fraction of its supporters in the group. The three
models differ in term of their population structure: in the bottom-up
hierarchical system, individuals are located on a finite regular tree, in the
non-spatial public debate model, they are located on a complete graph, and in
the spatial public debate model, they are located on the $d$-dimensional
regular lattice. For the bottom-up hierarchical system and non-spatial public
debate model, Galam studied the probability that a given opinion wins under the
majority rule and assuming that individuals' opinions are initially
independent, making the initial number of supporters of a given opinion a
binomial random variable. The first objective of this paper is to revisit his
result assuming that the initial number of individuals in favor of a given
opinion is a fixed deterministic number ...


title: Out-of-sample Extension for Latent Position Graphs

abstract:
  We consider the problem of vertex classification for graphs constructed from
the latent position model. It was shown previously that the approach of
embedding the graphs into some Euclidean space followed by classification in
that space can yields a universally consistent vertex classifier. However, a
major technical difficulty of the approach arises when classifying unlabeled
out-of-sample vertices without including them in the embedding stage. In this
paper, we studied the out-of-sample extension for the graph embedding step and
its impact on the subsequent inference tasks. We show that, under the latent
position graph model and for sufficiently large $n$, the mapping of the
out-of-sample vertices is close to its true latent position. We then
demonstrate that successful inference for the out-of-sample vertices is
possible.


title: Proof of Varagnolo-Vasserot conjecture on cyclotomic categories O

abstract:
  We prove an asymptotic version of a conjecture by Varagnolo and Vasserot on
an equivalence between the category O for a cyclotomic Rational Cherednik
algebra and a suitable truncation of an affine parabolic category O. We prove
an asymptotic version of a conjecture by Varagnolo and Vasserot on an
equivalence between the category O for a cyclotomic Rational Cherednik algebra
and a suitable truncation of an affine parabolic category O that, in
particular, implies Rouquier's conjecture on the decomposition numbers in the
former. Our proof uses two ingredients: an extension of Rouquier's deformation
approach as well as categorical actions on highest weight categories and
related combinatorics. This text replaces arXiv:1207.1299.


title:
Fractional Gaussian noise criterion for correlations characterization: a
  random-matrix-theory inspired perspective

abstract:
  We introduce a particular construction of an autocorrelation matrix of a time
series and its analysis based on the random-matrix theory ideas that is capable
of unveiling the type of correlations information which is inaccessible to the
straight analysis of the autocorrelation function. Exploiting the well-studied
hierarchy of the fractional Gaussian noise (fGn), an \emph{in situ} criterion
for the sake of a quantitative comparison with the autocorrelation data is
offered. We illustrate the applicability of our method by two paradigmatic
examples from the orthodox context of the stock markets and the turbulence.
Quite strikingly, a remarkable agreement with the fGn is achieved
notwithstanding the non-Gaussianity in returns of the stock market. In the
latter context, on the contrary, a significant deviation from an fGn is
observed despite a Gaussian distribution of the velocity profile of the
turbulence.

categories: physics.data-an cond-mat.stat-mech math-ph math.MP


title:
Methods to Calculate the Upper Bound of Gini Coefficient Based on
  Grouped Data and the Result for China

abstract:
  How to give an upper bound, especially the smallest upper bound of Gini
coefficient based on grouped data in the absence of income brackets is still a
problem not properly solved. This article provides an upper bound which is easy
to compute, and provides an effective algorithm to calculate the exact value of
the smallest upper bound. As illustrations, the calculation results of bounds
for Gini coefficients of urban and rural China from 2003 to 2008 will be
provided.


title: ATLAS: Adaptive Topology- and Load-Aware Scheduling

abstract:
  The largest strength of contention-based MAC protocols is simultaneously the
largest weakness of their scheduled counterparts: the ability to adapt to
changes in network conditions. For scheduling to be competitive in mobile
wireless networks, continuous adaptation must be addressed. We propose ATLAS,
an Adaptive Topology- and Load-Aware Scheduling protocol to address this
problem. In ATLAS, each node employs a random schedule achieving its
persistence, the fraction of time a node is permitted to transmit, that is
computed in a topology and load dependent manner. A distributed auction (REACT)
piggybacks offers and claims onto existing network traffic to compute a
lexicographic max-min channel allocation. A node's persistence p is related to
its allocation. Its schedule achieving p is updated where and when needed,
without waiting for a frame boundary.We study how ATLAS adapts to controlled
changes in topology and load. Our results show that ATLAS adapts to most
network changes in less than 0.1s, with about 20% relative error, scaling with
network size. We further study ATLAS in more dynamic networks showing that it
keeps up with changes in topology and load sufficient for TCP to sustain
multi-hop flows, a struggle in IEEE 802.11 networks. The stable performance of
ATLAS supports the design of higher-layer services that inform, and are
informed by, the underlying communication network.


title:
Spin fluctuations away from (pi,0) in the superconducting phase of
  molecular-intercalated FeSe

abstract:
  Magnetic fluctuations in the molecular-intercalated FeSe superconductor
Li{x}(ND2){y}(ND3){1-y}Fe2Se2 (Tc = 43K) have been measured by inelastic
neutron scattering from a powder sample. The strongest magnetic scattering is
observed at a wave vector Q ~ 1.4 A^{-1}, which is not consistent with the
(pi,0) nesting wave vector that characterizes magnetic fluctuations in several
other iron-based superconductors, but is close to the (pi, pi/2) position found
for A{x}Fe{2-y}Se2 systems. At the energies probed (~ 5kB Tc), the magnetic
scattering increases in intensity with decreasing temperature below Tc,
consistent with the superconductivity-induced magnetic resonance found in other
iron-based superconductors.


title: Weak Interaction Neutron Production Rates in Fully Ionized Plasmas

abstract:
  Employing the weak interaction reaction wherein a heavy electron is captured
by a proton to produce a neutron and a neutrino, the neutron production rate
for neutral hydrogen gases and for fully ionized plasmas is computed. Using the
Coulomb atomic bound state wave functions of a neutral hydrogen gas, our
production rate results are in agreement with recent estimates by Maiani {\it
et al}. Using Coulomb scattering state wave functions for the fully ionized
plasma, we find a substantially enhanced neutron production rate. The
scattering wave function should replace the bound state wave function for
estimates of the enhanced neutron production rate on water plasma drenched
cathodes of chemical cells.


title: Neutrinoless double $\beta$ decay with small neutrino masses

abstract:
  If the only contribution to neutrinoless double beta decay (NLDBD) are
neutrino masses its discovery may be very difficult, especially if neutrinos
present a normal hierarchy spectrum. However, this is not the only possibility;
NLDBD can in general produce electrons of either chirality, in contrast with
the neutrino induced NLDBD which predicts two left-handed electrons. Using an
effective Lagrangian approach we classify the lepton number violating (LNV)
effective operators with two leptons of either chirality but no quarks, ordered
according to the magnitude of their contribution to NLDBD. We point out that,
for each of the three chirality assignments, $e_{L}e_{L},e_{L}e_{R}$ and
$e_{R}e_{R}$, there is only one LNV operator of the corresponding type to
lowest order, and these have dimensions 5, 7 and 9, respectively. Neutrino
masses are always induced by these extra operators but can be delayed to one
(dimension 7) or two loops (dimension 9). Under the assumption that NLDBD is
dominated by the operators of dimension 7 or 9 we find that the scale of new
physics should be relatively low ($\lesssim 30$ TeV). We also list the SM
additions generating these operators upon integration of the heavy modes, and
discuss simple realistic examples of renormalizable theories for each case. The
phenomenology of a model giving rise to the dimension 9 operator has been
analyzed with some detail: if NLDBD is going to be seen in the next round of
experiments, the doubly charged scalars of the model could be seen at the LHC
and lepton flavour violating (LFV) rates could be at the reach of foreseen
experiments. Moreover neutrino masses, which arise at two loops, display a very
particular structure and are strongly constrained, in fact,
$\sin^{2}\theta_{13}\gtrsim0.008$, when $\mu\rightarrow eee$ is required to lie
below its present experimental limit.


title:
Reflection-dominated nuclear X-ray emission in the early-type galaxy ESO
  565--G019

abstract:
  We present the discovery of a reflection-dominated active galactic nucleus
(AGN) in the early-type radio-quiet galaxy ESO 565--G019 with Suzaku and
Swift/BAT. The source X-ray spectrum below 10 keV is characteristic of other
Compton-thick (CT) AGN, clearly showing an inverted continuum and prodigious
fluorescence iron emission above ~3 keV. A Compton shoulder to the neutral Fe
Kalpha line also appears to be present. There is evidence for long-term hard
X-ray flux variability which we associate with changes in the intrinsic AGN
power-law. The increasing sensitivity of ongoing and new hard X-ray surveys
means that more such reflection-dominated AGN ought to be uncovered in the near
future. ESO 565--G019 is hosted in an early-type galaxy whose morphology has
been variously classified as either type E or type S0. Only about 20 bona fide
CT-AGN have been identified in the local universe so far, and all exist in host
galaxies with late Hubble types (S0 or later). CT columns of nuclear obscuring
gas are uncommon in early-type galaxies in the local universe, so confirmation
of the exact morphological class of ESO 565--G019 is important. Infrared
photometry also shows the presence of large quantities of cool dust in the
host, indicative of significant ongoing star-formation. ESO 565--G019 may be
the first identified local example of minor-merger driven CT-AGN growth in an
early-type host, or may be the result of interaction with its neighboring
galaxy ESO 565--G018 in a wide pair.


title:
Complex $\Gamma$-convergence and magnetic Dirichlet Laplacian in bounded
  thin tubes

abstract:
  The resolvent convergence of self-adjoint operators via the technique of
$\Gamma$-convergence of quadratic forms is adapted to incorporate complex
Hilbert spaces. As an application, we find effective operators to the Dirichlet
Laplacian with magnetic potentials in very thin bounded tubular regions in
space built along smooth closed curves; relatively weak regularity is asked for
the potentials, and the convergence is in the norm resolvent sense as the cross
sections of the tubes go uniformly to zero.


title: Two-Nucleon Systems in a Finite Volume: (I) Quantization Conditions

abstract:
  The quantization condition for interacting energy eigenvalues of the
two-nucleon system in a finite cubic volume is derived in connection to the
nucleon-nucleon scattering amplitudes. This condition is derived using an
auxiliary (dimer) field formalism that is generalized to arbitrary partial
waves in the context of non-relativistic effective field theory. The
quantization condition presented gives access to the scattering parameters of
the two-nucleon systems with arbitrary parity, spin, isospin, angular momentum
and center of mass motion, from a lattice QCD calculation of the energy
eigenvalues. In particular, as it includes all non-central interactions, such
as the two-nucleon tensor force, it makes explicit the dependence of the mixing
parameters of nucleon-nucleon systems calculated from lattice QCD when there is
a physical mixing among different partial-waves, e. g. S-D mixing in the
deuteron channel. We provide explicit relations among scattering parameters and
their corresponding point group symmetry class eigenenergies with orbital
angular momentum l smaller than or equal to 3, and for center of mass boost
vectors of the form 2\pi (2n_1, 2n_2, 2n_3)/L, 2\pi (2n_1, 2n_2, 2n_3+1)/L and
2\pi (2n_1+1, 2n_2+1, 2n_3)/L. L denotes the special extent of the cubic volume
and n_1,n_2,n_3 are integers. Our results are valid below inelastic thresholds
up to exponential volume corrections that are governed by the pion mass.


title: Classical signature of quantum annealing

abstract:
  A pair of recent articles concluded that the D-Wave One machine actually
operates in the quantum regime, rather than performing some classical
evolution. Here we give a classical model that leads to the same behaviors used
in those works to infer quantum effects. Thus, the evidence presented does not
demonstrate the presence of quantum effects.


title: A Graph Minor Perspective to Multicast Network Coding

abstract:
  Network Coding encourages information coding across a communication network.
While the necessity, benefit and complexity of network coding are sensitive to
the underlying graph structure of a network, existing theory on network coding
often treats the network topology as a black box, focusing on algebraic or
information theoretic aspects of the problem. This work aims at an in-depth
examination of the relation between algebraic coding and network topologies. We
mathematically establish a series of results along the direction of: if network
coding is necessary/beneficial, or if a particular finite field is required for
coding, then the network must have a corresponding hidden structure embedded in
its underlying topology, and such embedding is computationally efficient to
verify. Specifically, we first formulate a meta-conjecture, the NC-Minor
Conjecture, that articulates such a connection between graph theory and network
coding, in the language of graph minors. We next prove that the NC-Minor
Conjecture is almost equivalent to the Hadwiger Conjecture, which connects
graph minors with graph coloring. Such equivalence implies the existence of
$K_4$, $K_5$, $K_6$, and $K_{O(q/\log{q})}$ minors, for networks requiring
$\mathbb{F}_3$, $\mathbb{F}_4$, $\mathbb{F}_5$ and $\mathbb{F}_q$,
respectively. We finally prove that network coding can make a difference from
routing only if the network contains a $K_4$ minor, and this minor containment
result is tight. Practical implications of the above results are discussed.


title: Isometries of quadratic spaces

abstract:
  Let k be a field of characteristic not 2, let q be a quadratic space over k
and let f be an irreducible polynomial with coefficients in k. In 1969, Milnor
raised the following question : how can we decide whether q has an isometry
with minimal polynomial f ? We give an answer to this question in the case of
global fields. A more general version of the question is also considered.


title: A comparative study of selected parallel tempering methods

abstract:
  We review several parallel tempering schemes and examine their main
ingredients for accuracy and efficiency. The present study covers two selection
methods of temperatures and several choices for the exchange of replicas,
including a recent novel all-pair exchange method. We compare the resulting
schemes and measure specific heat errors and efficiency using the
two-dimensional (2D) Ising model. Our tests suggest that, an earlier proposal
for using numbers of local moves related to the canonical correlation times is
one of the key ingredients for increasing efficiency, and protocols using
cluster algorithms are found to be very effective. Some of the protocols are
also tested for efficiency and ground state production in 3D spin glass models
where we find that, a simple nearest-neighbor approach using a local n-fold way
algorithm is the most effective. Finally, we present evidence that the
asymptotic limits of the ground state energy for the isotropic case and that of
an anisotropic case of the 3D spin-glass model are very close and may even
coincide.


title: PT-symmetric optical potentials in a coherent atomic medium

abstract:
  We demonstrate that a coherently-prepared four-level atomic medium can
provide a versatile platform for realizing parity-time (PT) symmetric optical
potentials. Different types of PT-symmetric potentials are proposed by
appropriately tuning the exciting optical fields and the pertinent atomic
parameters. Such reconfigurable and controllable systems can open up new
avenues in observing PT-related phenomena with appreciable gain/loss contrast
in coherent atomic media.


title: Canonical tree-decompositions of finite graphs II. Essential parts

abstract:
  In Part I of this series we described three algorithms that construct
canonical tree-decompositions of graphs which distinguish all their k-blocks
and tangles of order k. We now establish bounds on the number of parts in these
decompositions that contain no such block or tangle, and determine conditions
under which such parts contain nothing but a k-block.


title:
Model of quantum measurement and thermodynamical cost of accuracy and
  stability of information processing

abstract:
  The quantum measurement problem is revisited and discussed in terms of a new
solvable measurement model which basic ingredient is the quantum model of a
controlled single-bit memory. The structure of this model involving strongly
coupled spin and quantum harmonic oscillator allows to define stable pointer
states as well-separated Gaussian states of the quantum oscillator and analyze
the transition from quantum to classical regime. The relations between accuracy
of measurement, stability of pointer states, effective temperature of joint
thermal and quantum noise and minimal work needed to perform the bit-flip are
derived. They differ from those based on the Landauer principle and are used to
analyze thermodynamic efficiency of quantum Szilard engine and imply more
realistic estimations of minimal amount of work needed to perform long
computations.


title:
Finiteness of profinite groups with a rational probabilistic zeta
  function

abstract:
  We prove that every profinite group in a certain class with a rational
probabilistic zeta function has only finitely many maximal subgroups.


title: Rules with parameters in modal logic I

abstract:
  We study admissibility of inference rules and unification with parameters in
transitive modal logics (extensions of K4), in particular we generalize various
results on parameter-free admissibility and unification to the setting with
parameters.
  Specifically, we give a characterization of projective formulas generalizing
Ghilardi's characterization in the parameter-free case, leading to new proofs
of Rybakov's results that admissibility with parameters is decidable and
unification is finitary for logics satisfying suitable frame extension
properties (called cluster-extensible logics in this paper). We construct
explicit bases of admissible rules with parameters for cluster-extensible
logics, and give their semantic description. We show that in the case of
finitely many parameters, these logics have independent bases of admissible
rules, and determine which logics have finite bases.
  As a sideline, we show that cluster-extensible logics have various nice
properties: in particular, they are finitely axiomatizable, and have an
exponential-size model property. We also give a rather general characterization
of logics with directed (filtering) unification.
  In the sequel, we will use the same machinery to investigate the
computational complexity of admissibility and unification with parameters in
cluster-extensible logics, and we will adapt the results to logics with unique
top cluster (e.g., S4.2) and superintuitionistic logics.


title: The graphic nature of the symmetric group

abstract:
  We investigate a remarkable class of exponential sums which are derived from
the symmetric groups and which display a diverse array of visually appealing
features. Our interest in these expressions stems not only from their
astounding visual properties, but also from the fact that they represent a
novel and intriguing class of supercharacters.


title: Tight Kernel Bounds for Problems on Graphs with Small Degeneracy

abstract:
  In this paper we consider kernelization for problems on d-degenerate graphs,
i.e. graphs such that any subgraph contains a vertex of degree at most $d$.
This graph class generalizes many classes of graphs for which effective
kernelization is known to exist, e.g. planar graphs, H-minor free graphs, and
H-topological-minor free graphs. We show that for several natural problems on
d-degenerate graphs the best known kernelization upper bounds are essentially
tight.


title: A phenomenology of certain many-body-localized systems

abstract:
  We consider isolated quantum systems with all of their many-body eigenstates
localized. We define a sense in which such systems are integrable, and discuss
a method for finding their localized conserved quantum numbers ("constants of
motion"). These localized operators are interacting pseudospins and are subject
to dephasing but not to dissipation, so any quantum states of these pseudospins
can in principle be recovered via (spin) echo procedures. We also discuss the
spreading of entanglement in many-body localized systems, which is another
aspect of the dephasing due to interactions between these localized conserved
operators.


title: New mixing pattern for neutrinos

abstract:
  We propose a new mixing pattern for neutrinos with a nonzero mixing angle
$\theta_{13}$. Under a simple form, it agrees well with current neutrino
oscillation data and displays a number of intriguing features including the
$\mu$-$\tau$ interchange symmetry $|U_{\mu i}|=|U_{\tau i}|$, $(i=1,2,3)$, the
trimaximal mixing $|U_{\e 2}|=|U_{\mu 2}|=|U_{\tau 2}|=1/\sqrt{3}$, the
self-complementarity relation $\theta_1+\theta_3=45\deg$, together with the
maximal Dirac CP violation as a prediction.


title: Note on Evaluation of Hierarchical Modular Systems

abstract:
  This survey note describes a brief systemic view to approaches for evaluation
of hierarchical composite (modular) systems. The list of considered issues
involves the following: (i) basic assessment scales (quantitative scale,
ordinal scale, multicriteria description, two kinds of poset-like scales), (ii)
basic types of scale transformations problems, (iii) basic types of scale
integration methods. Evaluation of the modular systems is considered as
assessment of system components (and their compatibility) and integration of
the obtained local estimates into the total system estimate(s). This process is
based on the above-mentioned problems (i.e., scale transformation and
integration). Illustrations of the assessment problems and evaluation
approaches are presented (including numerical examples).


title: Electroweak Results from HERA

abstract:
  Neutral and charged current deep inelastic ep scattering with longitudinally
polarised lepton beams has been studied with the H1 and ZEUS detectors at HERA.
The differential cross sections were measured in the range of four-momentum
transfer squared, Q^2, up to 50'000 GeV^2, where electroweak effects become
clearly visible. The measurements were used to determine the structure function
xF_3 and to constrain vector and the axial-vector couplings of the light quarks
to the Z^0 boson. The polarisation dependence of the charged current total
cross section was also measured.
  Limits on flavour changing neutral current processes were computed from the
search for single-top production. The elastic Z^0 production cross section was
measured to be in agreement with the SM prediction. Limits on new physics
phenomena at high Q^2 were also derived within the general framework of
four-fermion eeqq contact interactions.


title:
From full stopping to transparency in a holographic model of heavy ion
  collisions

abstract:
  We numerically simulate planar shock wave collisions in anti-de Sitter space
as a model for heavy ion collisions of large nuclei. We uncover a cross-over
between two different dynamical regimes as a function of the collision energy.
At low energies the shocks first stop and then explode in a manner
approximately described by hydrodynamics, in close similarity with the Landau
model. At high energies the receding fragments move outwards at the speed of
light, with a region of negative energy density and negative longitudinal
pressure trailing behind them. The rapidity distribution of the energy density
at late times around mid-rapidity is not approximately boost-invariant but
Gaussian, albeit with a width that increases with the collision energy.


title: Substructure of Boosted Jets

abstract:
  Jets with transverse energy of few TeV are becoming now common in LHC data.
Most of these jets are produced by QCD processes and some from the collimated
decay of highly boosted objects like W, Z, H0 and top-quark. The study of such
QCD jets may shed light on QCD showering processes and the identification of
the jets coming from decays may test the Standard Model under extreme
conditions and may also provide the first hints for Physics Beyond the Standard
Model. A short review of jet algorithms, Correction procedures for pile-up
effects and commonly used substructure observables are described.


title: Route to stabilized ultrabroadband microresonator-based frequency combs

abstract:
  We perform the first theoretical modeling of the spectral-temporal dynamics
of parametric microresonator comb generation with octave-spanning bandwidths
through use of the Lugiato-Lefever model extended to include higher-order
dispersion and self-steepening. We show that three distinct stages are
necessary to achieve single-pulse modelocking and ultrabroadband, stabilized
combs. Our simulations agree well with previous experimental demonstrations and
predict many of the observed features, including multi-pulse generation,
dispersive wave generation, modelocking and comb stabilization.


title: Lattices in products of trees and a theorem of H.C. Wang

abstract:
  We study cocompact lattices with dense projections in a product $G_1 \times
G_2$ of locally compact groups and show, under the assumption that each $G_i$
is a closed subgroup of the automorphism group $Aut(T_i)$ of a regular tree
satisfying certain local transitivity conditions, that such a lattice is
contained in only finitely many discrete subgroups of $G_1 \times G_2$.


title: Non-adiabatic processes in Majorana qubit systems

abstract:
  We investigate the non-adiabatic processes occurring during the manipulations
of Majorana qubits in 1-D semiconducting wires with proximity induced
superconductivity. Majorana qubits are usually protected by the excitation gap.
Yet, manipulations performed at a finite pace can introduce both decoherence
and renormalization effects. Though exponentially small for slow manipulations,
these effects are important as they may constitute the ultimate decoherence
mechanism. Moreover, as adiabatic topological manipulations fail to produce a
universal set of quantum gates, non-adiabatic manipulations might be necessary
to perform quantum computation.


title:
On the importance of nonlinear modeling in computer performance
  prediction

abstract:
  Computers are nonlinear dynamical systems that exhibit complex and sometimes
even chaotic behavior. The models used in the computer systems community,
however, are linear. This paper is an exploration of that disconnect: when
linear models are adequate for predicting computer performance and when they
are not. Specifically, we build linear and nonlinear models of the processor
load of an Intel i7-based computer as it executes a range of different
programs. We then use those models to predict the processor loads forward in
time and compare those forecasts to the true continuations of the time series


title: Root polytopes, parking functions, and the HOMFLY polynomial

abstract:
  We show that for a special alternating link diagram, the following three
polynomials are essentially the same: a) the part of the HOMFLY polynomial that
corresponds to the leading term in the Alexander polynomial; b) the $h$-vector
for a triangulation of the root polytope of the Seifert graph and c) the
enumerator of parking functions for the planar dual of the Seifert graph. These
observations yield formulas for the maximal $z$-degree part of the HOMFLY
polynomial of an arbitrary homogeneous link as well. Our result is part of a
program aimed at reading HOMFLY coefficients out of Heegaard Floer homology.


title: Gluon Fusion Processes at One-loop within the Standard Model and Beyond

abstract:
  In this thesis, we have studied certain gluon fusion processes which proceed
via quark loop diagrams at the leading order. The fact that these gluon-gluon
channel processes are independent processes, their contributions towards the
total/differential hadronic cross sections can be calculated separately. We
have considered the production of a pair of electroweak vector bosons in
association with a jet via gluon fusion within the standard model. These
processes were not accessible at earlier hadron colliders such as the Tevatron.
Therefore, observation of these rare processes at the LHC will be a test of the
standard model itself. Like the di-vector boson production via gluon fusion
processes, these processes are also important backgrounds for many new physics
signals, and the standard model Higgs boson signal at the LHC. These leading
order gluon fusion processes contribute to the corresponding hadronic processes
at the next-to-next-to-leading order in {\alpha}_s. We have taken a model of
extra-dimensions, the ADD (Arkani-Hamed, Dimopoulos and Dvali) model, as the
possible candidate of new physics at the LHC. This model tries to solve the
hierarchy problem of the standard model by proposing large extra space
dimensions which may be accessible at TeV scale. We have considered the direct
production of KK-gravitons (GKK) in association with an electroweak boson
(H/{\gamma}/Z) via gluon fusion. These processes contribute to the
corresponding hadronic processes at the next-to-leading order in {\alpha}_s.
Many interesting issues related to the fermion loop amplitudes have also been
discussed.


title: Generalized helicity and Beltrami fields

abstract:
  We propose covariant and non-abelian generalizations of the magnetic helicity
and Beltrami equation. The gauge invariance, variational principle, conserved
current, energy-momentum tensor and choice of boundary conditions elucidate the
subject. In particular, we prove that any extremal of the Yang-Mills action
functional $\tfrac{1}{4}\int_\Omega\tr{F_{\mu\nu}F^{\mu\nu}}\,d^4x$ subject to
the local constraint
$\epsilon^{\mu\nu\alpha\beta}\tr{F_{\mu\nu}F_{\alpha\beta}}=0$ satisfies the
covariant non-abelian Beltrami equation.


title: Rotation of Plasma Layers with Various Densities in Crossed ExB Fields

abstract:
  The rotational velocity of plasma layers with various densities in a pulsed
reflex-discharge plasma is studied with the use of the two-frequency microwave
fluctuation reflectometry. The difference between the angular rotational
velocities of plasma layers with different densities is revealed, and their
time dependences are determined. The rotational velocity of plasma layers is
found to increase with the magnetic field induction. On the basis of the
experimental data obtained, the radial electric field strength in the plasma
layers concerned is evaluated.


title:
Coexisting attractors and chaotic canard explosions in a slow-fast
  optomechanical system

abstract:
  The multiple time scale dynamics induced by radiation pressure and
photothermal effects in a high-finesse optomechanical resonator is
experimentally studied. At difference with two-dimensional slow-fast systems,
the transition from the quasiharmonic to the relaxational regime occurs via
chaotic canard explosions, where large-amplitude relaxation spikes are
separated by an irregular number of subthreshold oscillations. We also show
that this regime coexists with other periodic attractors, on which the
trajectories evolve on a substantially faster time scale. The experimental
results are reproduced and analyzed by means of a detailed physical model of
our system.


title:
The rapid assembly of an elliptical galaxy of 400 billion solar masses
  at a redshift of 2.3

abstract:
  Stellar archeology shows that massive elliptical galaxies today formed
rapidly about ten billion years ago with star formation rates above several
hundreds solar masses per year (M_sun/yr). Their progenitors are likely the
sub-millimeter-bright galaxies (SMGs) at redshifts (z) greater than 2. While
SMGs' mean molecular gas mass of 5x10^10 M_sun can explain the formation of
typical elliptical galaxies, it is inadequate to form ellipticals that already
have stellar masses above 2x10^11 M_sun at z ~ 2. Here we report
multi-wavelength high-resolution observations of a rare merger of two massive
SMGs at z = 2.3. The system is currently forming stars at a tremendous rate of
2,000 M_sun/yr. With a star formation efficiency an order-of-magnitude greater
than that of normal galaxies, it will quench the star formation by exhausting
the gas reservoir in only ~200 million years. At a projected separation of 19
kiloparsecs, the two massive starbursts are about to merge and form a passive
elliptical galaxy with a stellar mass of ~4x10^11 M_sun. Our observations show
that gas-rich major galaxy mergers, concurrent with intense star formation, can
form the most massive elliptical galaxies by z ~ 1.5.


title:
A physical model for cosmological simulations of galaxy formation:
  multi-epoch validation

abstract:
  We present a multi-epoch analysis of the galaxy populations formed within the
cosmological hydrodynamical simulations presented in Vogelsberger et al.
(2013). These simulations explore the performance of a recently implemented
feedback model which includes primordial and metal line radiative cooling with
self-shielding corrections; stellar evolution with associated mass loss and
chemical enrichment; feedback by stellar winds; black hole seeding, growth and
merging; and AGN quasar- and radio-mode heating with a phenomenological
prescription for AGN electro-magnetic feedback. We illustrate the impact of the
model parameter choices on the resulting simulated galaxy population properties
at high and intermediate redshifts. We demonstrate that our scheme is capable
of producing galaxy populations that broadly reproduce the observed galaxy
stellar mass function extending from redshift z=0 to z=3. We also characterise
the evolving galactic B-band luminosity function, stellar mass to halo mass
ratio, star formation main sequence, Tully-Fisher relation, and gas-phase
mass-metallicity relation and confront them against recent observational
estimates. This detailed comparison allows us to validate elements of our
feedback model, while also identifying areas of tension that will be addressed
in future work.


title:
Warm Ionized Gas Revealed in the Magellanic Bridge Tidal Remnant:
  Constraining the Baryon Content and the Escaping Ionizing Photons around
  Dwarf Galaxies

abstract:
  The Magellanic System includes some of the nearest examples of galaxies
disturbed by galaxy interactions. These interactions have redistributed much of
their gas into the halos of the Milky Way and the Magellanic Clouds. We present
Wisconsin H-alpha Mapper kinematically resolved observations of the warm
ionized gas in the Magellanic Bridge over the velocity range of +100 to +300
km/s in the local standard-of-rest reference frame. These observations include
the first full H-alpha intensity map and the corresponding intensity-weighted
mean velocity map of the Magellanic Bridge across (l, b) = (281.5, -30.0) to
(302.5, -46.7). Using the H-alpha emission from the SMC-Tail and the Bridge we
estimate that the mass of the ionized material is between (0.7-1.7)x10^8 times
the mass of the Sun, compared to 3.3x10^8 times the mass of the Sun for the
neutral mass over the same region. The diffuse Bridge is significantly more
ionized than the SMC-Tail, with an ionization fraction of 36-52% compared to
5-24% for the Tail. The H-alpha emission has a complex multiple-component
structure with a velocity distribution that could trace the sources of
ionization or distinct ionized structures. We find that incident radiation from
the extragalactic background and the Milky Way alone are insufficient to
produced the observed ionization in the Magellanic Bridge and present a model
for the escape fraction of the ionizing photons from both the Small and Large
Magellanic Clouds. With this model, we place an upper limit of 4.0% for the
average escape fraction of ionizing photons from the LMC and an upper limit of
5.5% for the SMC. These results, combined with the findings of a half a dozen
results for dwarf galaxies in different environments, provide compelling
evidence that only a small percentage of the ionizing photons escape from dwarf
galaxies in the present epoch to influence their surroundings.


title: The Ages of High Mass X-ray Binaries in NGC 2403 and NGC 300

abstract:
  We have examined resolved stellar photometry from HST imaging surrounding 18
high-mass X-ray binary (HMXB) candidates in NGC 300 and NGC 2403 as determined
from combined Chandra/HST analysis. We have fit the color-magnitude
distribution of the surrounding stars with stellar evolution models. All but
one region in NGC 300 and two in NGC 2403 contain a population with an age
between 20 and 70 Myr. One of the candidates is the ultraluminous X-ray source
(ULX) in NGC 2403, which we associate with a 60 Myr old population. These age
distributions provide additional evidence that 16 of these 18 candidates are
HMXBs. Furthermore, our results suggest that the most common HMXB age in these
galaxies is 40-55 Myr. This preferred age is similar to observations of HMXBs
in the Small Magellanic Cloud, providing new evidence of this formation
timescale, but in higher metallicity populations. We suggest that this
preferred HMXB age is the result of the fortuitous combination of two physical
effects. First, this is the age of a population when the greatest rate of
core-collapse events should be occurring, maximizing neutron star production.
Second, this is the age when B stars are most likely to be actively losing
mass. We also discuss our results in the context of HMXB feedback in galaxies,
confirming HMXBs as a potentially important source of energy for the
interstellar medium in low-mass galaxies.


title:
Complex diffuse radio emission in the merging PLANCK ESZ cluster Abell
  3411

abstract:
  We present VLA radio and Chandra X-ray observations of the merging galaxy
cluster Abell 3411. For the cluster, we find an overall temperature of 6.4 keV
and an X-ray luminosity of 2.8 x 10^{44} erg s^{-1} between 0.5 and 2.0 keV.
The Chandra observation reveals the cluster to be undergoing a merger event.
The VLA observations show the presence of large-scale diffuse emission in the
central region of the cluster, which we classify as a 0.9 Mpc size radio halo.
In addition, a complex region of diffuse, polarized emission is found in the
southeastern outskirts of the cluster, along the projected merger axis of the
system. We classify this region of diffuse emission as a radio relic. The total
extent of this radio relic is 1.9 Mpc. For the combined emission in the cluster
region, we find a radio spectral index of -1.0 \pm 0.1 between 74 MHz and 1.4
GHz. The morphology of the radio relic is peculiar, as the relic is broken up
into five fragments. This suggests that the shock responsible for the relic has
been broken up due to interaction with a large-scale galaxy filament connected
to the cluster or other substructures in the ICM. Alternatively, the complex
morphology reflects the presence of electrons in fossil radio bubbles that are
re-accelerated by a shock.


title:
Hubble Space Telescope Observations of Dusty Filaments in Hercules A:
  Evidence for Entrainment

abstract:
  We present U, V, and I-band images of the host galaxy of Hercules A (3C 348)
obtained with HST/WFC3/UVIS. We find a network of dusty filaments which are
more complex and extended than seen in earlier HST observations. The filaments
are associated with a faint blue continuum light (possibly from young stars)
and faint H-alpha emission. It seems likely that the cold gas and dust has been
stripped from a companion galaxy now seen as a secondary nucleus. There are
dusty filaments aligned with the base of the jets on both eastern and western
sides of the galaxy. The morphology of the filaments is different on the two
sides - the western filaments are fairly straight, while the eastern filaments
are mainly in two loop-like structures. We suggest that despite the difference
in morphologies, both sets of filaments have been entrained in a slow moving
boundary layer outside the relativistic flow. As suggested by Fabian et al.
(2008), magnetic fields in the filaments may stabilize them against disruption.
We consider a speculative scenario to explain the relation between the radio
source and the shock and cavities in the hot ICM seen in the Chandra data
(Nulsen et al. 2005). We suggest the radio source originally (~60 Myr ago)
propagated along a position angle of ~35 degrees where it created the shock and
cavities. The radio source axis changed to its current orientation (~100
degrees) possibly due to a supermassive black hole merger and began its current
epoch of activity about 20 Myr ago.


title: Interlayer excitonic superfluidity in graphene

abstract:
  We discuss the conditions under which the predicted (but not yet observed)
zero-field interlayer excitonic condensation in double layer graphene has a
critical temperature high enough to allow detection. Crucially, disorder
arising from charged impurities and corrugation in the lattice structure ---
invariably present in all real samples --- affects the formation of the
condensate via the induced charge inhomogeneity. In the former case, we use a
numerical Thomas-Fermi-Dirac theory to describe the local fluctuations in the
electronic density in double layer graphene devices and estimate the effect
these realistic fluctuations have on the formation of the condensate. To make
this estimate, we calculate the critical temperature for the interlayer
excitonic superfluid transition within the mean-field BCS theory for both
optimistic (unscreened) and conservative (statically screened) approximations
for the screening of the interlayer Coulomb interaction. We also estimate the
effect of allowing dynamic contributions to the interlayer screening. We then
conduct similar calculations for double quadratic bilayer graphene, showing
that the quadratic nature of the low-energy bands produces pairing with
critical temperature of the same order of magnitude as the linear bands of
double monolayer graphene.


title: An X-Ray View of the Jet-Cycle in the Radio Loud AGN 3C120

abstract:
  We present a study of the central engine in the broad-line radio galaxy 3C120
using a multi-epoch analysis of a deep XMM-Newton observation and two deep
Suzaku pointings (in 2012). In order to place our spectral data into the
context of the disk-disruption/jet-ejection cycles displayed by this object, we
monitor the source in the UV/X-ray bands, and in the radio band. We find three
statistically acceptable spectral models, a disk-reflection model, a jet-model
and a jet+disk model. Despite being good descriptions of the data, the
disk-reflection model violates the radio constraints on the inclination, and
the jet-model has a fine-tuning problem, requiring a jet contribution exceeding
that expected. Thus, we argue for a composite jet+disk model. Within the
context of this model, we verify the basic predictions of the jet-cycle
paradigm, finding a truncated/refilling disk during the Suzaku observations and
a complete disk extending down to the innermost stable circular orbit (ISCO)
during the XMM-Newton observation. The idea of a refilling disk is further
supported by the detection of the ejection of a new jet knot approximately one
month after the Suzaku pointings. We also discover a step-like event in one of
the Suzaku pointings in which the soft band lags the hard band. We suggest that
we are witnessing the propagation of a disturbance from the disk into the jet
on a timescale set by the magnetic field.


title: The central kpc of edge-on AGN

abstract:
  The NIR is less influenced by dust extinction than optical light. This
enables us to look to an extent through dusty regions. In addition, it is
sensitive to the mass-dominating stellar population. The combination of NIR
imaging and spectroscopy of the VLT integral field spectrograph SINFONI gives
us the opportunity to analyze several emission and absorption lines and to
investigate the stellar population and ionization mechanisms over a field of
view (FOV) of 4x4 square arcsec. We detect several emission lines ([Si VI],
Pa\alpha, Br\gamma, H_2, [Fe II]) and analyze these to disentangle the
ionization mechanisms and the kinematics of the gas. We use the absorption
features of Si I, CO(6-3) and CO(2-0) and the large wavelength range of
H+K-band for a thorough continuum synthesis. We fit a stellar, dust and
power-law contribution together with an extinction component to the H+K-band
emission. The result presents regions dominated by the different contributors
and extinction information over the full FOV.


title: Review of asymmetric dark matter

abstract:
  Asymmetric dark matter models are based on the hypothesis that the
present-day abundance of dark matter has the same origin as the abundance of
ordinary or visible matter: an asymmetry in the number densities of particles
and antiparticles. They are largely motivated by the observed similarity in the
mass densities of dark and visible matter, with the former observed to be about
five times the latter. This review discusses the construction of asymmetric
dark matter models, summarizes cosmological and astrophysical implications and
bounds, and touches on direct detection prospects and collider signatures.


title: Plasmon anomaly in the dynamical optical conductivity of graphene

abstract:
  We theoretically consider the effect of plasmon collective modes on the
frequency-dependent conductivity of graphene in the presence of the random
static potential of charged impurities. We develop an equation of motion
approach suitable for the relativistic Dirac electrons in graphene that allows
analytical high-frequency asymptotic solution in the presence of both disorder
and interaction. We show that the presence of the acoustic plasmon pole (i.e.
the plasmon frequency vanishing at long wavelengths as the square-root of
wavevector) in the inverse dynamical dielectric function of graphene gives rise
to a strong variation with frequency of the screening effect of the
relativistic electron gas in graphene on the potential of charged impurities.
The resulting frequency-dependent impurity scattering rate gives rise to a
broad peak in the frequency-dependent graphene optical conductivity with the
amplitude and the position of the peak being sensitive to the detailed
characteristics of disorder and interaction in the system. This sample (i.e.
disorder, elecron density and interaction strength) dependent redistribution of
the spectral weight in the frequency-dependent graphene conductivity may have
already been experimentally observed in optical measurements.


title:
The nature of massive black hole binary candidates: I. Spectral
  properties and evolution

abstract:
  Theoretically, bound binaries of massive black holes are expected as the
natural outcome of mergers of massive galaxies. From the observational side,
however, massive black hole binaries remain elusive. Velocity shifts between
narrow and broad emission lines in quasar spectra are considered a promising
observational tool to search for spatially unresolved, dynamically bound
binaries. In this series of papers we investigate the nature of such candidates
through analyses of their spectra, images and multi-wavelength spectral energy
distributions. Here we investigate the properties of the optical spectra,
including the evolution of the broad line profiles, of all the sources
identified in our previous study. We find a diverse phenomenology of broad and
narrow line luminosities, widths, shapes, ionization conditions and time
variability, which we can broadly ascribe to 4 classes based on the shape of
the broad line profiles: 1) Objects with bell-shaped broad lines with big
velocity shifts (>1000 km/s) compared to their narrow lines show a variety of
broad line widths and luminosities, modest flux variations over a few years,
and no significant change in the broad line peak wavelength. 2) Objects with
double-peaked broad emission lines tend to show very luminous and broadened
lines, and little time variability. 3) Objects with asymmetric broad emission
lines show a broad range of broad line luminosities and significant variability
of the line profiles. 4) The remaining sources tend to show moderate to low
broad line luminosities, and can be ascribed to diverse phenomena. We discuss
the implications of our findings in the context of massive black hole binary
searches.


title: Computational diagnosis and risk evaluation for canine lymphoma

abstract:
  The canine lymphoma blood test detects the levels of two biomarkers, the
acute phase proteins (C-Reactive Protein and Haptoglobin). This test can be
used for diagnostics, for screening, and for remission monitoring as well. We
analyze clinical data, test various machine learning methods and select the
best approach to these problems. Three family of methods, decision trees, kNN
(including advanced and adaptive kNN) and probability density evaluation with
radial basis functions, are used for classification and risk estimation.
Several pre-processing approaches were implemented and compared. The best of
them are used to create the diagnostic system. For the differential diagnosis
the best solution gives the sensitivity and specificity of 83.5% and 77%,
respectively (using three input features, CRP, Haptoglobin and standard
clinical symptom). For the screening task, the decision tree method provides
the best result, with sensitivity and specificity of 81.4% and >99%,
respectively (using the same input features). If the clinical symptoms
(Lymphadenopathy) are considered as unknown then a decision tree with CRP and
Hapt only provides sensitivity 69% and specificity 83.5%. The lymphoma risk
evaluation problem is formulated and solved. The best models are selected as
the system for computational lymphoma diagnosis and evaluation the risk of
lymphoma as well. These methods are implemented into a special web-accessed
software and are applied to problem of monitoring dogs with lymphoma after
treatment. It detects recurrence of lymphoma up to two months prior to the
appearance of clinical signs. The risk map visualisation provides a friendly
tool for explanatory data analysis.


title:
Recurrent Outbursts and Jet Ejections Expected in Swift J1644+57:
  Limit-Cycle Activities in a Supermassive Black Hole

abstract:
  The tidal disruption event by a supermassive black hole in Swift J1644+57 can
trigger limit-cycle oscillations between a supercritically accreting X-ray
bright state and a subcritically accreting X-ray dim state. Time evolution of
the debris gas around a black hole with mass $M=10^{6} {\MO}$ is studied by
performing axisymmetric, two-dimensional radiation hydrodynamic simulations. We
assumed the $\alpha$-prescription of viscosity, in which the viscous stress is
proportional to the total pressure. The mass supply rate from the outer
boundary is assumed to be ${\dot M}_{\rm supply}=100L_{\rm Edd}/c^2$, where
$L_{\rm Edd}$ is the Eddington luminosity, and $c$ is the light speed. Since
the mass accretion rate decreases inward by outflows driven by radiation
pressure, the state transition from a supercritically accreting slim disk state
to a subcritically accreting Shakura-Sunyaev disk starts from the inner disk
and propagates outward in a timescale of a day. The sudden drop of the X-ray
flux observed in Swift J1644+57 in August 2012 can be explained by this
transition. As long as ${\dot M}_{\rm supply}$ exceeds the threshold for the
existence of a radiation pressure dominant disk, accumulation of the accreting
gas in the subcritically accreting region triggers the transition from a gas
pressure dominant Shakura-Sunyaev disk to a slim disk. This transition takes
place at $t {\sim}~50/({\alpha}/0.1)$ days after the X-ray darkening. We expect
that if $\alpha > 0.01$, X-ray emission with luminosity $\gtrsim 10^{44}$ ${\rm
erg}{\cdot}{\rm s}^{-1}$ and jet ejection will revive in Swift J1644+57 in
2013--2014.


title: Near-BPS Skyrmions: Constant baryon density

abstract:
  Although it provides a relatively good picture of the nucleons, the Skyrme
Model is unable to reproduce the small binding energy in nuclei. This suggests
that Skyrme-like models that nearly saturate the Bogomol'nyi bound may be more
appropriate since their mass is roughly proportional to the baryon number A.
For that purpose, we propose a near-BPS Skyrme Model. It consists of terms up
to order six in derivatives of the pion fields, including the nonlinear and
Skyrme terms which are assumed to be relatively small. For our special choice
of mass term, we obtain well-behaved analytical BPS-type solutions with
constant baryon density configurations, as opposed to the more complex
shell-like configurations found in most extensions of the Skyrme Model. Fitting
the four model parameters, we find a remarkable agreement for the binding
energy per nucleon B/A with respect to experimental data. These results support
the idea that nuclei could be near-BPS Skyrmions.


title: A remark on Rickard complexes

abstract:
  In this paper, we characterize a Rickard complex, which induces a Rickard
equivalence between the block algebras of a block $b$ and its Brauer
correspondent and whose vertices have the same order as defect groups of the
block $b$. The homology of such a Rickard complex vanishes at all degree but
degree $q$, and the homology at degree $q$ induces a basic Morita equivalence
between the block algebras in the sense of Puig.


title:
Direct observation of nanometer-scale Joule and Peltier effects in phase
  change memory devices

abstract:
  We measure power dissipation in phase change memory (PCM) devices by scanning
Joule ex-pansion microscopy (SJEM) with ~50 nm spatial and 0.2 K temperature
resolution. The temperature rise in the Ge2Sb2Te5 (GST) is dominated by Joule
heating, but at the GST-TiW contacts it is a combination of Peltier and current
crowding effects. Comparison of SJEM and electrical characterization with
simulations of the PCM devices uncovers a thermopower ~350 uV/K for 25 nm thick
films of face centered-cubic crystallized GST, and contact resistance ~2.0 x
10^-8 Ohm-m2. Knowledge of such nanoscale Joule, Peltier, and current crowding
effects is essential for energy-efficient design of future PCM technology.


title: Improving NSGA-II with an Adaptive Mutation Operator

abstract:
  The performance of a Multiobjective Evolutionary Algorithm (MOEA) is
crucially dependent on the parameter setting of the operators. The most desired
control of such parameters presents the characteristic of adaptiveness, i.e.,
the capacity of changing the value of the parameter, in distinct stages of the
evolutionary process, using feedbacks from the search for determining the
direction and/or magnitude of changing. Given the great popularity of the
algorithm NSGA-II, the objective of this research is to create adaptive
controls for each parameter existing in this MOEA. With these controls, we
expect to improve even more the performance of the algorithm.
  In this work, we propose an adaptive mutation operator that has an adaptive
control which uses information about the diversity of candidate solutions for
controlling the magnitude of the mutation. A number of experiments considering
different problems suggest that this mutation operator improves the ability of
the NSGA-II for reaching the Pareto optimal Front and for getting a better
diversity among the final solutions.


title:
Inducing time reversal invariant topological superconductivity and
  fermion parity pumping in quantum wires

abstract:
  We propose a setup to realize time-reversal invariant topological
superconductors in quantum wires, proximity coupled to conventional
superconductors. We consider a model of quantum wire with strong spin-orbit
coupling and proximity coupling to two s-wave superconductors. When the
relative phase between the two superconductors is $\phi=\pi$ a Kramers' pair of
Majorana zero modes appears at each edge of the wire. We study the robustness
of the phase in presence of both time-reversal invariant and time-reversal
breaking perturbations. In addition, we show that the system forms a natural
realization of a fermion parity pump, switching the local fermion parity of
both edges when the relative phase between the superconductors is changed
adiabatically by $2\pi$.


title:
Swift X-ray Telescope Monitoring of Fermi-LAT Gamma Ray Sources of
  Interest

abstract:
  We describe a long-term Swift monitoring program of Fermi gamma-ray sources,
particularly the 23 gamma-ray "sources of interest." We present a systematic
analysis of the Swift X-ray Telescope light curves and hardness ratios of these
sources, and we calculate excess variability. We present data for the time
interval of 2004 December 22 through 2012 August 31. We describe the analysis
methods used to produce these data products, and we discuss the availability of
these data in an online repository, which continues to grow from more data on
these sources and from a growing list of additional sources. This database
should be of use to the broad astronomical community for long term studies of
the variability of these objects and for inclusion in multi-wavelength studies.


title: Stability of the Self-accelerating Universe in Massive Gravity

abstract:
  We study linear perturbations around time dependent spherically symmetric
solutions in the Lambda_3 massive gravity theory, which self-accelerate in the
vacuum. We find that the dynamics of the scalar perturbations depend on the
coordinate choice for the background solutions. For particular choices of
coordinates there is a symmetry enhancement, leaving no propagating scalar
degrees of freedom at linear order in perturbations. In contrast, any other
coordinate choice propagates a single scalar mode. We find that the Hamiltonian
of this scalar mode is unbounded from below for all self-accelerating
solutions, signalling an instability.


title:
Strain tuning of a quantum dot strongly coupled to a photonic crystal
  cavity

abstract:
  We demonstrate reversible strain-tuning of a quantum dot strongly coupled to
a photonic crystal cavity. We observe an average redshift of 0.45 nm for
quantum dots located inside the cavity membrane, achieved with an electric
field of 15 kV/cm applied to a piezo-electric actuator. Using this technique,
we demonstrate the ability to tune a quantum dot into resonance with a photonic
crystal cavity in the strong coupling regime, resulting in a clear
anti-crossing. The bare cavity resonance is less sensitive to strain than the
quantum dot and shifts by only 0.078 nm at the maximum applied electric field.


title:
A Statistical Learning Theory Approach for Uncertain Linear and Bilinear
  Matrix Inequalities

abstract:
  In this paper, we consider the problem of minimizing a linear functional
subject to uncertain linear and bilinear matrix inequalities, which depend in a
possibly nonlinear way on a vector of uncertain parameters. Motivated by recent
results in statistical learning theory, we show that probabilistic guaranteed
solutions can be obtained by means of randomized algorithms. In particular, we
show that the Vapnik-Chervonenkis dimension (VC-dimension) of the two problems
is finite, and we compute upper bounds on it. In turn, these bounds allow us to
derive explicitly the sample complexity of these problems. Using these bounds,
in the second part of the paper, we derive a sequential scheme, based on a
sequence of optimization and validation steps. The algorithm is on the same
lines of recent schemes proposed for similar problems, but improves both in
terms of complexity and generality. The effectiveness of this approach is shown
using a linear model of a robot manipulator subject to uncertain parameters.


title:
Dusty OB Stars in the Small Magellanic Cloud - I: Optical Spectroscopy
  Reveals Predominantly Main-Sequence OB Stars

abstract:
  We present the results of optical spectroscopic follow-up of 125 candidate
main sequence OB stars in the Small Magellanic Cloud (SMC) that were originally
identified in the S3MC infrared imaging survey as showing an excess of emission
at 24 um indicative of warm dust, such as that associated with a transitional
or debris disks. We use these long-slit spectra to investigate the origin of
the 24 um emission and the nature of these stars. A possible explanation for
the observed 24 um excess, that these are emission line stars with dusty
excretion disks, is disproven for the majority of our sources. We find that 88
of these objects are normal stars without line emission, with spectral types
mostly ranging from late-O to early-B; luminosity classes a sub-set of our
sample indicate that most are main-sequence stars. We further identify 17
emission-line stars, 7 possible emission-line stars, and 5 other stars with
forbidden-line emission. We discover a new O6 Iaf star; it exhibits strong HeII
4686 A emission but relatively weak NIII 4640 A emission that we attribute to
the lower nitrogen abundance in the SMC. Two other objects are identified with
planetary nebulae, one with a young stellar object, and two with X-ray
binaries. To shed additional light on the nature of the observed 24 um excess
we use optical and infrared photometry to estimate the dust properties of the
objects with normal O and B star spectra and compare these properties to those
of a sample of hot spots in the Galactic interstellar medium (ISM). We find
that the dust properties of the dusty OB star sample resemble the properties of
the Galactic sample of hot spots. Some may be runaway systems with bow-shocks
resulting from a large velocity difference between star and ISM. We further
investigate the nature of these dusty OB stars in a companion paper presenting
mid-infrared spectroscopy and additional imaging.


title:
Dusty OB stars in the Small Magellanic Cloud - II: Extragalactic Disks
  or Examples of the Pleiades Phenomenon?

abstract:
  We use mid-infrared Spitzer spectroscopy and far-infrared Herschel photometry
for a sample of twenty main sequence O9--B2 stars in the Small Magellanic Cloud
(SMC) with strong 24 micron excesses to investigate the origin of the mid-IR
emission. Either debris disks around the stars or illuminated patches of dense
interstellar medium (ISM) can cause such mid-IR emission. In a companion paper,
Paper I, we use optical spectroscopy to show that it is unlikely for any of
these sources to be classical Be stars or Herbig Ae/Be stars. We focus our
analysis on debris disks and cirrus hot spots. We find three out of twenty
stars to be significantly extended in the mid-IR, establishing them as cirrus
hot spots. We then fit the IR spectral energy distributions to determine dust
temperatures and masses. We find the dust masses in the SMC stars to be larger
than for any known debris disks, although this evidence against the debris disk
hypothesis is circumstantial. Finally, we created a local comparison sample of
bright mid-IR OB stars in the Milky Way (MW) by cross-matching the WISE and
Hipparcos catalogs. All such local stars in the appropriate luminosity range
that can be unambiguously classified are young stars with optical emission
lines or are spatially resolved by WISE with sizes too large to be plausible
debris disk candidates. We conclude that the very strong mid-IR flux excesses
are most likely explained as cirrus hot spots, although we cannot rigorously
rule out that a small fraction of the sample is made up of debris disks or
transition disks. We present suggestive evidence that bow-shock heating around
runaway stars may be a contributing mechanism to the interstellar emission.
These sources, interpreted as cirrus hot spots, offer a new localised probe of
diffuse interstellar dust in a low metallicity environment. (Abridged)


title: A Data Mining Approach to Solve the Goal Scoring Problem

abstract:
  In soccer, scoring goals is a fundamental objective which depends on many
conditions and constraints. Considering the RoboCup soccer 2D-simulator, this
paper presents a data mining-based decision system to identify the best time
and direction to kick the ball towards the goal to maximize the overall chances
of scoring during a simulated soccer match. Following the CRISP-DM methodology,
data for modeling were extracted from matches of major international
tournaments (10691 kicks), knowledge about soccer was embedded via
transformation of variables and a Multilayer Perceptron was used to estimate
the scoring chance. Experimental performance assessment to compare this
approach against previous LDA-based approach was conducted from 100 matches.
Several statistical metrics were used to analyze the performance of the system
and the results showed an increase of 7.7% in the number of kicks, producing an
overall increase of 78% in the number of goals scored.


title: Arrayed Continuous-wave THz Photomixers

abstract:
  We present both chip-scale and free space coherent arrays of continuous-wave
THz photomixers. By altering the relative phases of the exciting laser signals,
the relative THz phase between the array elements can be tuned, allowing for
beam steering. The constructive interference of the emission of N elements
leads to an increase of the focal intensity by a factor of NxN while reducing
the beam width by ~1/N, below the diffraction limit of a single source. Such
array architectures strongly improve the THz power distribution for stand-off
spectroscopy and imaging systems while providing a huge bandwidth at the same
time. We demonstrate this by beam profiles generated by a free space 2x2 and a
4x1 array for a transmission distance of 4.2 meters. Spectra between 70 GHz and
1.1 THz have been recorded with these arrays.


title: Propositional Encoding of Constraints over Tree-Shaped Data

abstract:
  We present a functional programming language for specifying constraints over
tree-shaped data. The language allows for Haskell-like algebraic data types and
pattern matching. Our constraint compiler CO4 translates these programs into
satisfiability problems in propositional logic. We present an application from
the area of automated analysis of (non-)termination of rewrite systems.


title: The deceleration of nebular shells in evolved planetary nebulae

abstract:
  We have selected a group of 100 evolved planetary nebulae (PNe) and study
their kinematics based upon spatially-resolved, long-slit, echelle
spectroscopy. The data have been drawn from the San Pedro M\'artir Kinematic
Catalogue of PNe (L\'opez et al. 2012). The aim is to characterize in detail
the global kinematics of PNe at advanced stages of evolution with the largest
sample of homogenous data used to date for this purpose. The results reveal two
groups that share kinematics, morphology, and photo-ionization characteristics
of the nebular shell and central star luminosities at the different late stages
under study.The typical flow velocities we measure are usually larger than seen
in earlier evolutionary stages, with the largest velocities occurring in
objects with very weak or absent [N II] \lambda 6584 line emission, by all
indications the least evolved objects in our sample. The most evolved objects
expand more slowly. This apparent deceleration during the final stage of PNe
evolution is predicted by hydrodynamical models, but other explanations are
also possible. These results provide a template for comparison with the
predictions of theoretical models.


title:
Two Effective Heuristics for Beam Angle Optimization in Radiation
  Therapy

abstract:
  In radiation therapy, mathematical methods have been used for optimizing
treatment planning for delivery of sufficient dose to the cancerous cells while
keeping the dose to critical surrounding structures minimal. This optimization
problem can be modeled using mixed integer programming (MIP) whose solution
gives the optimal beam orientation as well as optimal beam intensity. The
challenge, however, is the computation time for this large scale MIP. We
propose and investigate two novel heuristic approaches to reduce the
computation time considerably while attaining high-quality solutions. We
introduce a family of heuristic cuts based on the concept of 'adjacent beams'
and a beam elimination scheme based on the contribution of each beam to deliver
the dose to the tumor in the ideal plan in which all potential beams can be
used simultaneously. We show the effectiveness of these heuristics for
intensity modulated radiation therapy (IMRT) and stereotactic body radiation
therapy (SBRT) on a clinical liver case.


title:
Radial Velocity Detection of Earth-mass Planets in the Presence of
  Activity Noise: The Case of Alpha Centauri Bb

abstract:
  We present an analysis of the publicly available HARPS radial velocity (RV)
measurements for Alpha Cen B, a star hosting an Earth-mass planet candidate in
a 3.24 day orbit. The goal is to devise robust ways of extracting low-amplitude
RV signals of low mass planets in the presence of activity noise. Two
approaches were used to remove the stellar activity signal which dominates the
RV variations: 1) Fourier component analysis (pre-whitening), and 2) local
trend filtering (LTF) of the activity using short time windows of the data. The
Fourier procedure results in a signal at P = 3.236 days and K = 0.42 m/s which
is consistent with the presence of an Earth-mass planet, but the false alarm
probability for this signal is rather high at a few percent. The LTF results in
no significant detection of the planet signal, although it is possible to
detect a marginal planet signal with this method using a different choice of
time windows and fitting functions. However, even in this case the significance
of the 3.24-d signal depends on the details of how a time window containing
only 10% of the data is filtered. Both methods should have detected the
presence of Alpha Cen Bb at a higher significance than is actually seen. We
also investigated the influence of random noise with a standard deviation
comparable to the HARPS data and sampled in the same way. The distribution of
the noise peaks in the period range 2.8 - 3.3 days have a maximum of
approximately 3.2 days and amplitudes approximately one-half of the K-amplitude
for the planet. The presence of the activity signal may boost the velocity
amplitude of these signals to values comparable to the planet. It may be
premature to attribute the 3.24 day RV variations to an Earth-mass planet. A
better understanding of the noise characteristics in the RV data as well as
more measurements with better sampling will be needed to confirm this
exoplanet.


title: Characterization and Synthesis of Rayleigh Damped Elastodynamic Networks

abstract:
  We consider damped elastodynamic networks where the damping matrix is assumed
to be a non-negative linear combination of the stiffness and mass matrices
(also known as Rayleigh or proportional damping). We give here a
characterization of the frequency response of such networks. We also answer the
synthesis question for such networks, i.e., how to construct a Rayleigh damped
elastodynamic network with a given frequency response. Our analysis shows that
not all damped elastodynamic networks can be realized when the proportionality
constants between the damping matrix and the mass and stiffness matrices are
fixed.


title: Baryon femtoscopy in sqrt(sNN) = 2.76 TeV Pb-Pb collisions at ALICE

abstract:
  We present femtoscopic results for proton and Lambda correlation functions
measured by ALICE in sqrt(sNN) = 2.76 TeV Pb-Pb collisions. Femtoscopic radii
are extracted from pp, pbarpbar, and ppbar pairs. Comparisons of these radii
with those from pion and kaon analyses reveal an approximate transverse mass
scaling that is consistent with explanations of radial flow. Inelastic final
state interactions are explored in baryon-antibaryon correlations functions to
investigate their relationship with reduced proton yields at LHC energies.


title: Does Plasmodium falciparum have an Achilles' heel?

abstract:
  Plasmodium falciparum is the parasite that causes the most severe form of
malaria. Currently, science has been established about its cellular structures,
its metabolic processes, and even the molecular structures of its intrinsic
membrane proteins responsible for transporting water, nutrient, and waste
molecules across the parasite plasma membrane (PPM). I hypothesize that
Plasmodium falciparum has an Achilles' heel that can be attacked with
erythritol, the well-known sweetener that is classified as generally safe. Most
organisms have in their cell membrane two types of water-channel proteins:
aquaporins to maintain hydro-homeostasis across the membrane and
aquaglyceroporins to uptake glycerols etc. In contrast, P. falciparum has only
one type of such proteins---the multi-functional aquaglyceroporin (PfAQP)
expressed in the PPM---to do both jobs. Moreover, the parasite also uses PfAQP
to excrete its metabolic wastes (ammonia included) produced at a very high rate
in the blood stage. This extremely high efficiency of the bug using one protein
for multiple essential tasks makes the parasite fatally vulnerable. Erythritol
in the blood stream can kill the parasite by clogging up its PfAQP channel that
needs to be open for maintaining hydro-homeostasis and for excreting toxic
wastes across the bug's PPM. In vitro tests are to measure the growth/death
rate of P. falciparum in blood with various erythritol concentrations. In vivo
experiments are to administer groups of infected mice with various doses of
erythritol and monitor the parasite growth levels from blood samples drawn from
each group. Clinic trials can be performed to observe the added effects of
administering to patients erythritol along with the known drugs because
erythritol was classified as a safe food ingredient.


title:
Enhanced electron photoemission by collective lattice resonances in
  plasmonic nanoparticle-array photodetectors and solar cells

abstract:
  We propose to use collective lattice resonances in plasmonic nanoparticle
arrays to enhance photoelectron emission in Schottky-barrier photodetectors and
solar cells. We show that the interaction of lattice resonances (the Rayleigh
anomaly) and individual particle excitations (localized surface plasmon
resonances) leads to stronger local field enhancement and significant increase
of the photocurrent compared to the case when only individual particle
excitations are present. The results can be used to design new photodetectors
with highly selective, tunable spectral response, able to detect photons with
the energy below the semiconductor bandgap, and to develop solar cells with
increased efficiency.


title:
Effects of local population structure in a reaction-diffusion model of a
  contact process on metapopulation networks

abstract:
  We investigate the effects of local population structure in
reaction-diffusion processes representing a contact process (CP) on
metapopulations represented as complex networks. Considering a model in which
the nodes of a large scale network represent local populations defined in terms
of a homogeneous graph, we show by means of extensive numerical simulations
that the critical properties of the reaction-diffusion system are independent
of the local population structure, even when this one is given by a ordered
linear chain. This independence is confirmed by the perfect matching between
numerical critical exponents and the results from a heterogeneous mean field
theory suited, in principle, to describe situations of local homogeneous
mixing. The analysis of several variations of the reaction-diffusion process
allow to conclude the independence from population structure of the critical
properties of CP-like models on metapopulations, and thus of the universality
of the reaction-diffusion description of this kind of models.


title:
Fragment-based Treatment of Delocalization and Static Correlation Errors
  in Density-Functional Theory

abstract:
  One of the most important open challenges in modern Kohn-Sham (KS)
density-functional theory (DFT) is the correct treatment of fractional electron
charges and spins. Approximate exchange-correlation (XC) functionals struggle
to do this in a systematic way, leading to pervasive delocalization and static
correlation errors. We demonstrate how these errors, which plague
density-functional calculations of bond-stretching processes, can be avoided by
employing the alternative framework of partition density-functional theory
(PDFT), even with simple local and semi-local functionals for the fragments.
Our method is illustrated with explicit calculations on the two paradigm
systems exhibiting delocalization and static-correlation, stretched H$_2^+$ and
H$_2$. We find in both cases our scheme leads to dissociation-energy errors of
less than 3%. The effective KS potential corresponding to our self-consistent
solutions display key features around the bond midpoint; these are known to be
present in the exact KS potential, but are absent from most approximate KS
potentials and are essential for the correct description of electron dynamics.


title: Generating shortcuts to adiabaticity in quantum and classical dynamics

abstract:
  Transitionless quantum driving achieves adiabatic evolution in a hurry, using
a counter-diabatic Hamiltonian to stifle non-adiabatic transitions. Here this
strategy is cast in terms of a generator of adiabatic transport, leading to a
classical analogue: dissipationless classical driving. For the single-particle
piston, this approach yields simple and exact expressions for both the
classical and quantal counter-diabatic terms. These results are further
generalized to even-power-law potentials in one degree of freedom.


title: Long-Term Monitoring of Comet 103P/Hartley 2

abstract:
  We reported the monitoring results on spectrophotometry, photometry and
imaging of comet 103P/Hartley 2 obtained at Lulin (1m), Calar Alto (2.2m) and
Beijing Astronomical (2.16m) Observatory from April to December 2010. We found
that a dust feature at sunward direction was detected starting from the end of
September until the beginning of December (our last observation from the Lulin
and Calar Alto observatory). Two distinct sunward jet features in the processed
images were observed on October 11 and after October 29 until November 2. In
parallel, the CN images reveal two asymmetrical jet features which are nearly
perpendicular to the Sun-nucleus direction and this asymmetrical features
implies that the comet was in a nearly side-on view in late-October and
early-November. Additional to the jet features, the average result of the
C2-to-CN production rate ratio ranges from 0.7 to 1.5 which places 103P/Hartley
2 as being of typical cometary chemistry. We found that the $r_h$ dependence
for the dust production rate, Afrho (5,000 km), is -3.75+-0.45 before
perihelion and is -3.44 +-1.20 during post-perihelion period. We detected the
higher dust reddening is around the optocenter and getting bluer outward along
the sunward jet feature and concluded that the former one, higher dust
reddening, could be associated with strong jet activity and the latter one, the
lowering of the reddening, might imply the optical properties changed or could
be associated with outburst. The average dust color did not appear to vary
significantly as the comet passed through perihelion.


title: Charged black rings from inverse scattering

abstract:
  The inverse scattering method of Belinsky and Zakharov is a powerful method
to construct solutions of vacuum Einstein equations. In particular, in five
dimensions this method has been successfully applied to construct a large
variety of black hole solutions. Recent applications of this method to
Einstein-Maxwell-dilaton (EMd) theory, for the special case of Kaluza-Klein
dilaton coupling, has led to the construction of the most general black ring in
this theory. In this contribution, we review the inverse scattering method and
its application to the EMd theory. We illustrate the efficiency of these
methods with a detailed construction of an electrically charged black ring.


title:
On atomicity of free algebras in Boolean algebras with operators, and a
  new result on Pinter's free algebras

abstract:
  We give some general theorems on free algebras of varieties of Boolean
algebras with operators; a hitherto new result is obtained for Pinter's
substitution algebras. For n\geq 3, and m>1, there is a generating set of the
free algebra freely generated by m elements, which is not a free set of
generators.


title: High-order phase transitions in the quadratic family

abstract:
  We give the first example of a transitive quadratic map whose real and
complex geometric pressure functions have a high-order phase transition. In
fact, near the phase transition these functions behave as $x \mapsto \exp (- 1
/ x^2)$ near $x = 0$, before becoming linear. This quadratic map has a
non-recurrent critical point, so it is non-uniformly hyperbolic in a strong
sense.


title:
Theory of Neutral and Charged Excitons in Monolayer Transition Metal
  Dichalcogenides

abstract:
  We present a microscopic theory of neutral excitons and charged excitons
(trions) in monolayers of transition metal dichalcogenides, including
molybdenum disulfide. Our theory is based on an effective mass model of
excitons and trions, parametrized by ab initio calculations and incorporating a
proper treatment of screening in two dimensions. The calculated exciton binding
energies are in good agreement with high-level many-body computations based on
the Bethe-Salpeter equation. Furthermore, our calculations for the more complex
trion species compare very favorably with recent experimental measurements, and
provide atomistic insight into the microscopic features which determine the
trion binding energy.