title: Pricing and Valuation under the Real-World Measure

abstract:
  In general it is not clear which kind of information is supposed to be used
for calculating the fair value of a contingent claim. Even if the information
is specified, it is not guaranteed that the fair value is uniquely determined
by the given information. A further problem is that asset prices are typically
expressed in terms of a risk-neutral measure. This makes it difficult to
transfer the fundamental results of financial mathematics to econometrics. I
show that the aforementioned problems evaporate if the financial market is
complete and sensitive. In this case, after an appropriate choice of the
numeraire, the discounted price processes turn out to be uniformly integrable
martingales under the real-world measure. This leads to a Law of One Price and
a simple real-world valuation formula in a model-independent framework where
the number of assets as well as the lifetime of the market can be finite or
infinite.


title:
Displacement induced electric force and natural self-oscillation of a
  free electron

abstract:
  We show that a kind of displacement induced temporary electric force of a
single point charge can be derived by using Maxwell stress analysis. This force
comes from the variation of the charge's electric intensities that follow
Coulomb's inverse square law, and it is a kind of displacement dependent
temporary restoring force. We also show the possible existence of natural
self-oscillation of a free electron which is driven by this restoring
self-force of its own electric fields.


title:
Multi-Layer Transmission and Hybrid Relaying for Relay Channels with
  Multiple Out-of-Band Relays

abstract:
  In this work, a relay channel is studied in which a source encoder
communicates with a destination decoder through a number of out-of-band relays
that are connected to the decoder through capacity-constrained digital backhaul
links. This model is motivated by the uplink of cloud radio access networks. In
this scenario, a novel transmission and relaying strategies are proposed in
which multi-layer transmission is used, on the one hand, to adaptively leverage
the different decoding capabilities of the relays and, on the other hand, to
enable hybrid decode-and-forward (DF) and compress-and-forward (CF) relaying.
The hybrid relaying strategy allows each relay to forward part of the decoded
messages and a compressed version of the received signal to the decoder. The
problem of optimizing the power allocation across the layers and the
compression test channels is formulated. Albeit non-convex, the derived problem
is found to belong to the class of so called complementary geometric programs
(CGPs). Using this observation, an iterative algorithm based on the homotopy
method is proposed that achieves a stationary point of the original problem by
solving a sequence of geometric programming (GP), and thus convex, problems.
Numerical results are provided that show the effectiveness of the proposed
multi-layer hybrid scheme in achieving performance close to a theoretical
(cutset) upper bound.


title:
Mesoscopic model for filament orientation in growing actin networks: the
  role of obstacle geometry

abstract:
  Propulsion by growing actin networks is a universal mechanism used in many
different biological systems. Although the core molecular machinery for actin
network growth is well preserved in most cases, the geometry of the propelled
obstacle can vary considerably. In recent years, filament orientation
distribution has emerged as an important observable characterizing the
structure and dynamical state of the growing network. Here we derive several
continuum equations for the orientation distribution of filaments growing
behind stiff obstacles of various shapes and validate the predicted steady
state orientation patterns by stochastic computer simulations based on discrete
filaments. We use an ordinary differential equation approach to demonstrate
that for flat obstacles of finite size, two fundamentally different orientation
patterns peaked at either +35/-35 or +70/0/-70 degrees exhibit mutually
exclusive stability, in agreement with earlier results for flat obstacles of
very large lateral extension. We calculate and validate phase diagrams as a
function of model parameters and show how this approach can be extended to
obstacles with piecewise straight contours. For curved obstacles, we arrive at
a partial differential equation in the continuum limit, which again is in good
agreement with the computer simulations. In all cases, we can identify the same
two fundamentally different orientation patterns, but only within an
appropriate reference frame, which is adjusted to the local orientation of the
obstacle contour. Our results suggest that two fundamentally different network
architectures compete with each other in growing actin networks, irrespective
of obstacle geometry, and clarify how simulated and electron tomography data
have to be analyzed for non-flat obstacle geometries.


title:
Numerical simulation of red blood cell suspensions behind a moving
  interface in a capillary

abstract:
  Computational modeling and simulation are presented on the motion of red
blood cells behind a moving interface in a capillary. The methodology is based
on an immersed boundary method and the skeleton structure of the red blood cell
(RBC) membrane is modeled as a spring network. The computational domain is
moving with either a designated RBC or an interface in an infinitely long
two-dimensional channel with an undisturbed flow field in front of the domain.
The tanking-treading and the inclination angle of a cell in a simple shear flow
are briefly discussed for the validation purpose. We then present the results
of the motion of red blood cells behind a moving interface in a capillary,
which show that the RBCs with higher velocity than the interface speed form a
concentrated slug behind the interface.


title: Modeling dark energy through an Ising fluid with network interactions

abstract:
  We show that the dark energy effects can be modeled by using an \emph{Ising
perfect fluid} with network interactions, whose low redshift equation of state,
i.e. $\omega_0$, becomes $\omega_0=-1$ as in the $\Lambda$CDM model. In our
picture, dark energy is characterized by a barotropic fluid on a lattice in the
equilibrium configuration. Thus, mimicking the spin interaction by replacing
the spin variable with an occupational number, the pressure naturally becomes
negative. We find that the corresponding equation of state mimics the effects
of a variable dark energy term, whose limiting case reduces to the cosmological
constant $\Lambda$. This permits us to avoid the introduction of a vacuum
energy as dark energy source by hand, alleviating the coincidence and fine
tuning problems. We find fairly good cosmological constraints, by performing
three tests with supernovae Ia, baryonic acoustic oscillation and cosmic
microwave background measurements. Finally, we perform the AIC and BIC
selection criteria, showing that our model is statistically favored with
respect to the CPL parametrization.


title: A determinacy approach to Borel combinatorics

abstract:
  We introduce a new method, involving infinite games and Borel determinacy,
which we use to answer several well-known questions in Borel combinatorics.


title: Flavour and CP Violation

abstract:
  In this talk I review the status of B mixing in the Standard Model and the
room for new physics in B_s and B_d mixing in the light of recent LHCb data.


title:
On the sufficiency of finite support duals in semi-infinite linear
  programming

abstract:
  We consider semi-infinite linear programs with countably many constraints
indexed by the natural numbers. When the constraint space is the vector space
of all real valued sequences, we show the finite support (Haar) dual is
equivalent to the algebraic Lagrangian dual of the linear program. This settles
a question left open by Anderson and Nash [Linear programming in infinite
dimensional spaces : theory and applications, Wiley 1987]. This result implies
that if there is a duality gap between the primal linear program and its finite
support dual, then this duality gap cannot be closed by considering the larger
space of dual variables that define the algebraic Lagrangian dual. However, if
the constraint space corresponds to certain subspaces of all real-valued
sequences, there may be a strictly positive duality gap with the finite support
dual, but a zero duality gap with the algebraic Lagrangian dual.


title: Contact structures, deformations and taut foliations

abstract:
  Using deformations of foliations to contact structures as well as rigidity
properties of Anosov foliations we provide infinite families of examples which
show that the space of taut foliations in a given homotopy class of plane
fields is in general not path connected. Similar methods also show that the
space of representations of the fundamental group of a hyperbolic surface to
the group of smooth diffeomorphisms of the circle with fixed Euler class is in
general not path connected. As an important step along the way we resolve the
question of which universally tight contact structures on Seifert fibered
spaces are deformations of taut or Reebless foliations when the genus of the
base is positive or the twisting number of the contact structure in the sense
of Giroux is non-negative.


title: Maximal lineability of the set of Continuous Surjections

abstract:
  Let $m,n$ be positive integers. In this short note we prove that the set of
all continuous and surjective functions from $\mathbb{R}^{m}$ to
$\mathbb{R}^{n}$ contains (excluding the 0 function) a
$\mathfrak{c}$-dimensional vector space. This result is optimal in terms of
dimension.


title:
Holographic description of strongly correlated electrons in external
  magnetic fields

abstract:
  We study the Fermi level structure of (2+1)-dimensional strongly interacting
electron systems in external magnetic field using the AdS/CFT correspondence.
The gravity dual of a finite density fermion system is a Dirac field in the
background of the dyonic AdS-Reissner-Nordstrom black hole. In the probe limit
the magnetic system can be reduced to the non-magnetic one, with
Landau-quantized momenta and rescaled thermodynamical variables. We find that
at strong enough magnetic fields, the Fermi surface vanishes and the
quasiparticle is lost either through a crossover to conformal regime or through
a phase transition to an unstable Fermi surface. In the latter case, the
vanishing Fermi velocity at the critical magnetic field triggers the non-Fermi
liquid regime with unstable quasiparticles and a change in transport properties
of the system. We associate it with a metal-"strange metal" phase transition.
  We compute the DC Hall and longitudinal conductivities using the
gravity-dressed fermion propagators. As expected, the Hall conductivity is
quantized according to integer Quantum Hall Effect (QHE) at weak magnetic
fields. At strong magnetic fields, new plateaus typical for the fractional QHE
appear. Our pattern closely resembles the experimental results on graphite
which are described using the fractional filling factor proposed by Halperin.


title:
The group of automorphisms of the Lie algebra of derivations of a
  polynomial algebra

abstract:
  We prove that the group of automorphisms of the Lie algebra $\Der_K (P_n)$ of
derivations of a polynomial algebra $P_n=K[x_1,..., x_n]$ over a field of
characteristic zero is canonically isomorphic to the the group of automorphisms
of the polynomial algebra $P_n$.


abstract:
  The groups of automorphisms of the Witt $W_n$ and Virasoro Lie algebras are
found.


title: Identification of significant features in DNA microarray data

abstract:
  DNA microarrays are a relatively new technology that can simultaneously
measure the expression level of thousands of genes. They have become an
important tool for a wide variety of biological experiments. One of the most
common goals of DNA microarray experiments is to identify genes associated with
biological processes of interest. Conventional statistical tests often produce
poor results when applied to microarray data due to small sample sizes, noisy
data, and correlation among the expression levels of the genes. Thus, novel
statistical methods are needed to identify significant genes in DNA microarray
experiments. This article discusses the challenges inherent in DNA microarray
analysis and describes a series of statistical techniques that can be used to
overcome these challenges. The problem of multiple hypothesis testing and its
relation to microarray studies is also considered, along with several possible
solutions.


title:
Parameter estimation in Cox models with missing failure indicators and
  the OPPERA study

abstract:
  In a prospective cohort study, examining all participants for incidence of
the condition of interest may be prohibitively expensive. For example, the
"gold standard" for diagnosing temporomandibular disorder (TMD) is a physical
examination by a trained clinician. In large studies, examining all
participants in this manner is infeasible. Instead, it is common to use
questionnaires to screen for incidence of TMD and perform the "gold standard"
examination only on participants who screen positively. Unfortunately, some
participants may leave the study before receiving the "gold standard"
examination. Within the framework of survival analysis, this results in missing
failure indicators. Motivated by the Orofacial Pain: Prospective Evaluation and
Risk Assessment (OPPERA) study, a large cohort study of TMD, we propose a
method for parameter estimation in survival models with missing failure
indicators. We estimate the probability of being an incident case for those
lacking a "gold standard" examination using logistic regression. These
estimated probabilities are used to generate multiple imputations of case
status for each missing examination that are combined with observed data in
appropriate regression models. The variance introduced by the procedure is
estimated using multiple imputation. The method can be used to estimate both
regression coefficients in Cox proportional hazard models as well as incidence
rates using Poisson regression. We simulate data with missing failure
indicators and show that our method performs as well as or better than
competing methods. Finally, we apply the proposed method to data from the
OPPERA study.


title: A New Homogeneity Inter-Clusters Measure in SemiSupervised Clustering

abstract:
  Many studies in data mining have proposed a new learning called
semi-Supervised. Such type of learning combines unlabeled and labeled data
which are hard to obtain. However, in unsupervised methods, the only unlabeled
data are used. The problem of significance and the effectiveness of
semi-supervised clustering results is becoming of main importance. This paper
pursues the thesis that muchgreater accuracy can be achieved in such clustering
by improving the similarity computing. Hence, we introduce a new approach of
semisupervised clustering using an innovative new homogeneity measure of
generated clusters. Our experimental results demonstrate significantly improved
accuracy as a result.


title:
The risks of mixing dependency lengths from sequences of different
  length

abstract:
  Mixing dependency lengths from sequences of different length is a common
practice in language research. However, the empirical distribution of
dependency lengths of sentences of the same length differs from that of
sentences of varying length and the distribution of dependency lengths depends
on sentence length for real sentences and also under the null hypothesis that
dependencies connect vertices located in random positions of the sequence. This
suggests that certain results, such as the distribution of syntactic dependency
lengths mixing dependencies from sentences of varying length, could be a mere
consequence of that mixing. Furthermore, differences in the global averages of
dependency length (mixing lengths from sentences of varying length) for two
different languages do not simply imply a priori that one language optimizes
dependency lengths better than the other because those differences could be due
to differences in the distribution of sentence lengths and other factors.


title:
Proceedings of the Sixteenth Conference on Uncertainty in Artificial
  Intelligence (2000)

abstract:
  This is the Proceedings of the Sixteenth Conference on Uncertainty in
Artificial Intelligence, which was held in San Francisco, CA, June 30 - July 3,
2000


title:
Proceedings of the Fifteenth Conference on Uncertainty in Artificial
  Intelligence (1999)

abstract:
  This is the Proceedings of the Fifteenth Conference on Uncertainty in
Artificial Intelligence, which was held in Stockholm Sweden, July 30 - August
1, 1999


title:
Proceedings of the Fourteenth Conference on Uncertainty in Artificial
  Intelligence (1998)

abstract:
  This is the Proceedings of the Fourteenth Conference on Uncertainty in
Artificial Intelligence, which was held in Madison, WI, July 24-26, 1998


title:
The Impact of Situation Clustering in Contextual-Bandit Algorithm for
  Context-Aware Recommender Systems

abstract:
  Most existing approaches in Context-Aware Recommender Systems (CRS) focus on
recommending relevant items to users taking into account contextual
information, such as time, location, or social aspects. However, few of them
have considered the problem of user's content dynamicity. We introduce in this
paper an algorithm that tackles the user's content dynamicity by modeling the
CRS as a contextual bandit algorithm and by including a situation clustering
algorithm to improve the precision of the CRS. Within a deliberately designed
offline simulation framework, we conduct evaluations with real online event log
data. The experimental results and detailed analysis reveal several important
discoveries in context aware recommender system.


title:
Proceedings of the Thirteenth Conference on Uncertainty in Artificial
  Intelligence (1997)

abstract:
  This is the Proceedings of the Thirteenth Conference on Uncertainty in
Artificial Intelligence, which was held in Providence, RI, August 1-3, 1997


title:
Proceedings of the Twelfth Conference on Uncertainty in Artificial
  Intelligence (1996)

abstract:
  This is the Proceedings of the Twelfth Conference on Uncertainty in
Artificial Intelligence, which was held in Portland, OR, August 1-4, 1996


title:
Proceedings of the Eleventh Conference on Uncertainty in Artificial
  Intelligence (1995)

abstract:
  This is the Proceedings of the Eleventh Conference on Uncertainty in
Artificial Intelligence, which was held in Montreal, QU, August 18-20, 1995


title:
Proceedings of the Tenth Conference on Uncertainty in Artificial
  Intelligence (1994)

abstract:
  This is the Proceedings of the Tenth Conference on Uncertainty in Artificial
Intelligence, which was held in Seattle, WA, July 29-31, 1994


title: Polar Coding for Fading Channels

abstract:
  A polar coding scheme for fading channels is proposed in this paper. More
specifically, the focus is Gaussian fading channel with a BPSK modulation
technique, where the equivalent channel could be modeled as a binary symmetric
channel with varying cross-over probabilities. To deal with variable channel
states, a coding scheme of hierarchically utilizing polar codes is proposed. In
particular, by observing the polarization of different binary symmetric
channels over different fading blocks, each channel use corresponding to a
different polarization is modeled as a binary erasure channel such that polar
codes could be adopted to encode over blocks. It is shown that the proposed
coding scheme, without instantaneous channel state information at the
transmitter, achieves the capacity of the corresponding fading binary symmetric
channel, which is constructed from the underlying fading AWGN channel through
the modulation scheme.


title:
Proceedings of the Ninth Conference on Uncertainty in Artificial
  Intelligence (1993)

abstract:
  This is the Proceedings of the Ninth Conference on Uncertainty in Artificial
Intelligence, which was held in Washington, DC, July 9-11, 1993


title:
Proceedings of the Eighth Conference on Uncertainty in Artificial
  Intelligence (1992)

abstract:
  This is the Proceedings of the Eighth Conference on Uncertainty in Artificial
Intelligence, which was held in Stanford, CA, July 17-19, 1992


title:
Proceedings of the Seventh Conference on Uncertainty in Artificial
  Intelligence (1991)

abstract:
  This is the Proceedings of the Seventh Conference on Uncertainty in
Artificial Intelligence, which was held in Los Angeles, CA, July 13-15, 1991


title:
Proceedings of the Sixth Conference on Uncertainty in Artificial
  Intelligence (1990)

abstract:
  This is the Proceedings of the Sixth Conference on Uncertainty in Artificial
Intelligence, which was held in Cambridge, MA, Jul 27 - Jul 29, 1990


title:
Proceedings of the Fifth Conference on Uncertainty in Artificial
  Intelligence (1989)

abstract:
  This is the Proceedings of the Fifth Conference on Uncertainty in Artificial
Intelligence, which was held in Windsor, ON, August 18-20, 1989


title:
Proceedings of the Fourth Conference on Uncertainty in Artificial
  Intelligence (1988)

abstract:
  This is the Proceedings of the Fourth Conference on Uncertainty in Artificial
Intelligence, which was held in Minneapolis, MN, July 10-12, 1988


title:
Proceedings of the Third Conference on Uncertainty in Artificial
  Intelligence (1987)

abstract:
  This is the Proceedings of the Third Conference on Uncertainty in Artificial
Intelligence, which was held in Seattle, WA, July 10-12, 1987


title:
Calorimetry of GRB 030329: Simultaneous Fitting to the Broadband Radio
  Afterglow and the Observed Image Expansion Rate

abstract:
  We perform calorimetry on the bright gamma ray burst (GRB) 030329 by fitting
simultaneously the broadband radio afterglow and the observed afterglow image
size to a semi-analytic magnetohydrodynamical (MHD) and afterglow emission
model. Our semi-analytic method is valid in both the relativistic and
non-relativistic regimes, and incorporates a model of the interstellar
scintillation that substantially effects the broadband afterglow below 10 GHz.
The model is fitted to archival measurements of the afterglow flux from 1 day
to 8.3 years after the burst. Values for the initial burst parameters are
determined and the nature of the circumburst medium is explored. Additionally,
direct measurements of the lateral expansion rate of the radio afterglow image
size allow us to estimate the initial Lorentz factor of the jet.


title:
Proceedings of the Second Conference on Uncertainty in Artificial
  Intelligence (1986)

abstract:
  This is the Proceedings of the Second Conference on Uncertainty in Artificial
Intelligence, which was held in Philadelphia, PA, August 8-10, 1986


title: Justificatory and Explanatory Argumentation for Committing Agents

abstract:
  In the interaction between agents we can have an explicative discourse, when
communicating preferences or intentions, and a normative discourse, when
considering normative knowledge. For justifying their actions our agents are
endowed with a Justification and Explanation Logic (JEL), capable to cover both
the justification for their commitments and explanations why they had to act in
that way, due to the current situation in the environment. Social commitments
are used to formalise justificatory and explanatory patterns. The combination
of ex- planation, justification, and commitments


title: Caustics of plane curves, their birationality and matrix projections

abstract:
  After recalling the notion of caustics of plane curves and basic equations,
we first show the birationality of the caustic map for a general source point S
in the plane. Then we prove more generally a theorem for curves D in the
projective space of 3x3 symmetric matrices B. For a general 3x1 vector S the
projection to the plane given by B --- BS is birational on D, unless D is not a
line and D is contained in a plane of the form Delta_v = {B | Bv = 0}.


title:
Absolutely Continuous Spectrum for random Schroedinger operators on the
  Fibonacci and similar tree-strips

abstract:
  We will consider cross products of finite graphs with a class of trees that
have arbitrarily but finitely long line segments, such as the Fibonacci tree.
Such cross products are called tree-strips. We prove that for small disorder
random Schr\"odinger operators on such tree-strips have purely absolutely
continuous spectrum in a certain set.


title: From Forbidden Coronal Lines to Meaningful Coronal Magnetic Fields

abstract:
  We review methods to measure magnetic fields within the corona using the
polarized light in magnetic-dipole (M1) lines. We are particularly interested
in both the global magnetic-field evolution over a solar cycle, and the local
storage of magnetic free energy within coronal plasmas. We address commonly
held skepticisms concerning angular ambiguities and line-of-sight confusion. We
argue that ambiguities are in principle no worse than more familiar remotely
sensed photospheric vector-fields, and that the diagnosis of M1 line data would
benefit from simultaneous observations of EUV lines. Based on calculations and
data from eclipses, we discuss the most promising lines and different
approaches that might be used. We point to the S-like [Fe {\sc XI}] line (J=2
to J=1) at 789.2nm as a prime target line (for ATST for example) to augment the
hotter 1074.7 and 1079.8 nm Si-like lines of [Fe {\sc XIII}] currently observed
by the Coronal Multi-channel Polarimeter (CoMP). Significant breakthroughs will
be made possible with the new generation of coronagraphs, in three distinct
ways: (i) through single point inversions (which encompasses also the analysis
of MHD wave modes), (ii) using direct comparisons of synthetic MHD or
force-free models with polarization data, and (iii) using tomographic
techniques.


title:
Reply to "Comment on 'Witnessed entanglement and the geometric measure
  of quantum discord' "

abstract:
  We show that the mistakes pointed out by Rana and Parashar [Phys. Rev. A 87,
016301 (2013)] do not invalidate the main conclusion of our work [Phys. Rev. A
86, 024302 (2012)]. We show that the errors affected only a particular
application of our general results, and present the correction.


title:
Distributed Cognitive Multiple Access Networks: Power Control,
  Scheduling and Multiuser Diversity

abstract:
  This paper studies optimal distributed power allocation and scheduling
policies (DPASPs) for distributed total power and interference limited (DTPIL)
cognitive multiple access networks in which secondary users (SU) independently
perform power allocation and scheduling tasks using their local knowledge of
secondary transmitter secondary base-station (STSB) and secondary transmitter
primary base-station (STPB) channel gains. In such networks, transmission
powers of SUs are limited by an average total transmission power constraint and
by a constraint on the average interference power that SUs cause to the primary
base-station. We first establish the joint optimality of water-filling power
allocation and threshold-based scheduling policies for DTPIL networks. We then
show that the secondary network throughput under the optimal DPASP scales
according to $\frac{1}{\e{}n_h}\log\logp{N}$, where $n_h$ is a parameter
obtained from the distribution of STSB channel power gains and $N$ is the total
number of SUs. From a practical point of view, our results signify the fact
that distributed cognitive multiple access networks are capable of harvesting
multiuser diversity gains without employing centralized schedulers and feedback
links as well as without disrupting primary's quality-of-service (QoS)


title: Fingerprint databases for theorems

abstract:
  We discuss the advantages of searchable, collaborative, language-independent
databases of mathematical results, indexed by "fingerprints" of small and
canonical data. Our motivating example is Neil Sloane's massively influential
On-Line Encyclopedia of Integer Sequences. We hope to encourage the greater
mathematical community to search for the appropriate fingerprints within each
discipline, and to compile fingerprint databases of results wherever possible.
The benefits of these databases are broad - advancing the state of knowledge,
enhancing experimental mathematics, enabling researchers to discover unexpected
connections between areas, and even improving the refereeing process for
journal publication.


title: Demazure Character Formulas for Generalized Kac--Moody Algebras

abstract:
  For a dominant integral weight $lambda $, we introduce a family of $U_q ^+
(mathfrak{g})$-submodules $V_w (lambda)$ of the irreducible highest weight $U_q
(mathfrak{g})$-module $V(lambda)$ of highest weight $lambda $ for a generalized
Kac--Moody algebra $mathfrak{g}$. We prove that the module $V_w (lambda)$ is
spanned by its global basis, and then give a character formula for $V_w
(lambda)$, which generalizes the Demazure character formula for ordinary
Kac--Moody algebras.


title: Network Design with Coverage Costs

abstract:
  We study network design with a cost structure motivated by redundancy in data
traffic. We are given a graph, g groups of terminals, and a universe of data
packets. Each group of terminals desires a subset of the packets from its
respective source. The cost of routing traffic on any edge in the network is
proportional to the total size of the distinct packets that the edge carries.
Our goal is to find a minimum cost routing. We focus on two settings. In the
first, the collection of packet sets desired by source-sink pairs is laminar.
For this setting, we present a primal-dual based 2-approximation, improving
upon a logarithmic approximation due to Barman and Chawla (2012). In the second
setting, packet sets can have non-trivial intersection. We focus on the case
where each packet is desired by either a single terminal group or by all of the
groups, and the graph is unweighted. For this setting we present an O(log
g)-approximation.
  Our approximation for the second setting is based on a novel spanner-type
construction in unweighted graphs that, given a collection of g vertex subsets,
finds a subgraph of cost only a constant factor more than the minimum spanning
tree of the graph, such that every subset in the collection has a Steiner tree
in the subgraph of cost at most O(log g) that of its minimum Steiner tree in
the original graph. We call such a subgraph a group spanner.


title: Regulator of modular units and Mahler measures

abstract:
  We present a proof of the formula, due to Mellit and Brunault, which
evaluates an integral of the regulator of two modular units to the value of the
$L$-series of a modular form of weight 2 at $s=2$. Applications of the formula
to computing Mahler measures are discussed.


title: Influence of initial conditions on the large-scale dynamo growth rate

abstract:
  To investigate the effect of energy and helicity on the growth of magnetic
field, helical kinetic forcing was applied to the magnetohydrodynamic(MHD)
system that had a specific distribution of energy and helicity as initial
conditions. Simulation results show the saturation of a system is not
influenced by the initial conditions, but the growth rate of large scale
magnetic field is proportionally dependent on the initial large scale magnetic
energy and helicity. It is already known that the helical component of small
scale magnetic field(i.e., current helicity $<{\bf j}\cdot {\bf b}>$) quenches
the growth of large scale magnetic field. However, $<{\bf j}\cdot {\bf b}>$ can
also boost the growth of large scale magnetic field by changing its sign and
magnitude. In addition, simulation shows the nonhelical magnetic field can
suppress the velocity field through Lorentz force. Comparison of the profiles
of evolving magnetic and kinetic energy indicates that kinetic energy migrates
backward when the external energy flows into the three dimensional MHD system,
which means the velocity field may play a preceding role in the very early MHD
dynamo stage.


title: Morrey-Sobolev Spaces on Metric Measure Spaces

abstract:
  In this article, the authors introduce the Newton-Morrey-Sobolev space on a
metric measure space $(\mathscr{X},d,\mu)$. The embedding of the
Newton-Morrey-Sobolev space into the H\"older space is obtained if
$\mathscr{X}$ supports a weak Poincar\'e inequality and the measure $\mu$ is
doubling and satisfies a lower bounded condition. Moreover, in the Ahlfors
$Q$-regular case, a Rellich-Kondrachov type embedding theorem is also obtained.
Using the Haj{\l}asz gradient, the authors also introduce the
Haj{\l}asz-Morrey-Sobolev spaces, and prove that the Newton-Morrey-Sobolev
space coincides with the Haj{\l}asz-Morrey-Sobolev space when $\mu$ is doubling
and $\mathscr{X}$ supports a weak Poincar\'e inequality. In particular, on the
Euclidean space ${\mathbb R}^n$, the authors obtain the coincidence among the
Newton-Morrey-Sobolev space, the Haj{\l}asz-Morrey-Sobolev space and the
classical Morrey-Sobolev space. Finally, when $(\mathscr{X},d)$ is
geometrically doubling and $\mu$ a non-negative Radon measure, the boundedness
of some modified (fractional) maximal operators on modified Morrey spaces is
presented; as an application, when $\mu$ is doubling and satisfies some measure
decay property, the authors further obtain the boundedness of some (fractional)
maximal operators on Morrey spaces, Newton-Morrey-Sobolev spaces and
Haj{\l}asz-Morrey-Sobolev spaces.


title: All Sampling Methods Produce Outliers

abstract:
  Given a computable probability measure P over natural numbers or infinite
binary sequences, there is no computable, randomized method that can produce an
arbitrarily large sample such that none of its members are outliers of P.


title: A note on weak convergence of singular integrals in metric spaces

abstract:
  We prove that in any metric space $(X,d)$ the singular integral operators
{equation*} T^k_{\mu,\ve}(f)(x)=\int_{X\setminus
B(x,\varepsilon)}k(x,y)f(y)d\mu (y).{equation*} converge weakly in some dense
subspaces of $L^2(\mu)$ under minimal regularity assumptions for the measures
and the kernels.


title:
Sparsity-Aware STAP Algorithms Using $L_1$-norm Regularization For Radar
  Systems

abstract:
  This article proposes novel sparsity-aware space-time adaptive processing
(SA-STAP) algorithms with $l_1$-norm regularization for airborne phased-array
radar applications. The proposed SA-STAP algorithms suppose that a number of
samples of the full-rank STAP data cube are not meaningful for processing and
the optimal full-rank STAP filter weight vector is sparse, or nearly sparse.
The core idea of the proposed method is imposing a sparse regularization
($l_1$-norm type) to the minimum variance (MV) STAP cost function. Under some
reasonable assumptions, we firstly propose a $l_1$-based sample matrix
inversion (SMI) to compute the optimal filter weight vector. However, it is
impractical due to its matrix inversion, which requires a high computational
cost when in a large phased-array antenna. Then, we devise lower complexity
algorithms based on conjugate gradient (CG) techniques. A computational
complexity comparison with the existing algorithms and an analysis of the
proposed algorithms are conducted. Simulation results with both simulated and
the Mountain Top data demonstrate that fast
signal-to-interference-plus-noise-ratio (SINR) convergence and good performance
of the proposed algorithms are achieved.


title:
Game-theoretic Understanding of Price Dynamics in Mobile Communication
  Services

abstract:
  In the mobile communication services, users wish to subscribe to high quality
service with a low price level, which leads to competition between mobile
network operators (MNOs). The MNOs compete with each other by service prices
after deciding the extent of investment to improve quality of service (QoS).
Unfortunately, the theoretic backgrounds of price dynamics are not known to us,
and as a result, effective network planning and regulative actions are hard to
make in the competitive market. To explain this competition more detail, we
formulate and solve an optimization problem applying the two-stage Cournot and
Bertrand competition model. Consequently, we derive a price dynamics that the
MNOs increase and decrease their service prices periodically, which completely
explains the subsidy dynamics in the real world. Moving forward, to avoid this
instability and inefficiency, we suggest a simple regulation rule which leads
to a Pareto-optimal equilibrium point. Moreover, we suggest regulator's optimal
actions corresponding to user welfare and the regulator's revenue.


title:
Power of the interactive proof systems with verifiers modeled by
  semi-quantum two-way finite automata

abstract:
  In this paper we explore the power of AM for the case that verifiers are {\em
two-way finite automata with quantum and classical states} (2QCFA)--introduced
by Ambainis and Watrous in 2002--and the communications are classical. It is of
interest to consider AM with such "semi-quantum" verifiers because they use
only limited quantum resources. Our main result is that such Quantum
Arthur-Merlin proof systems (QAM(2QCFA)) with polynomial expected running time
are more powerful than in the case verifiers are two-way probabilistic finite
automata (AM(2PFA)) with polynomial expected running time. Moreover, we prove
that there is a language which can be recognized by an exponential expected
running time QAM(2QCFA), but can not be recognized by any AM(2PFA), and that
the NP-complete language $L_{knapsack}$ can also be recognized by a QAM(2QCFA)
working only on quantum pure states using unitary operators.


title: Linear models based on noisy data and the Frisch scheme

abstract:
  We address the problem of identifying linear relations among variables based
on noisy measurements. This is, of course, a central question in problems
involving "Big Data." Often a key assumption is that measurement errors in each
variable are independent. This precise formulation has its roots in the work of
Charles Spearman in 1904 and of Ragnar Frisch in the 1930's. Various topics
such as errors-in-variables, factor analysis, and instrumental variables, all
refer to alternative formulations of the problem of how to account for the
anticipated way that noise enters in the data. In the present paper we begin by
describing the basic theory and provide alternative modern proofs to some key
results. We then go on to consider certain generalizations of the theory as
well applying certain novel numerical techniques to the problem. A central role
is played by the Frisch-Kalman dictum which aims at a noise contribution that
allows a maximal set of simultaneous linear relations among the noise-free
variables --a rank minimization problem. In the years since Frisch's original
formulation, there have been several insights including trace minimization as a
convenient heuristic to replace rank minimization. We discuss convex
relaxations and certificates guaranteeing global optimality. A complementary
point of view to the Frisch-Kalman dictum is introduced in which models lead to
a min-max quadratic estimation error for the error-free variables. Points of
contact between the two formalisms are discussed and various alternative
regularization schemes are indicated.


title:
Statistical physics of isotropic-genesis nematic elastomers: I.
  Structure and correlations at high temperatures

abstract:
  Isotropic-genesis nematic elastomers (IGNEs) are liquid crystalline polymers
(LCPs) that have been randomly, permanently cross-linked in the
high-temperature state so as to form an equilibrium random solid. Thus, instead
of being free to diffuse throughout the entire volume, as they would be in the
liquid state, the constituent LCPs in an IGNE are mobile only over a finite
length-scale controlled by the density of cross-links. We address the effects
that such network-induced localization have on the liquid-crystalline
characteristics of an IGNE, as probed via measurements made at high
temperatures. In contrast with the case of uncross-linked LCPs, for IGNEs these
characteristics are determined not only by thermal fluctuations but also by the
quenched disorder associated with the cross-link constraints. To study IGNEs,
we consider a microscopic model of dimer nematogens in which the dimers
interact via orientation-dependent excluded volume forces. The dimers are,
furthermore, randomly, permanently cross-linked via short Hookean springs, the
statistics of which we model by means of a Deam-Edwards type of distribution.
We show that at length-scales larger than the size of the nematogens this
approach leads to a recently proposed phenomenological Landau theory of IGNEs
[Lu et al., Phys. Rev. Lett. 108, 257803 (2012)], and hence predicts a regime
of short-ranged oscillatory spatial correlations in the nematic alignment, of
both thermal and glassy types. In addition, we consider two alternative
microscopic models of IGNEs: (i) a wormlike chain model of IGNEs that are
formed via the cross-linking of side-chain LCPs; and (ii) a jointed chain model
of IGNEs that are formed via the cross-linking of main-chain LCPs. At large
length-scales, both of these models give rise to liquid-crystalline
characteristics that are qualitatively in line with those predicted by the
dimer-and-springs model.


title:
Automatic case acquisition from texts for process-oriented case-based
  reasoning

abstract:
  This paper introduces a method for the automatic acquisition of a rich case
representation from free text for process-oriented case-based reasoning. Case
engineering is among the most complicated and costly tasks in implementing a
case-based reasoning system. This is especially so for process-oriented
case-based reasoning, where more expressive case representations are generally
used and, in our opinion, actually required for satisfactory case adaptation.
In this context, the ability to acquire cases automatically from procedural
texts is a major step forward in order to reason on processes. We therefore
detail a methodology that makes case acquisition from processes described as
free text possible, with special attention given to assembly instruction texts.
This methodology extends the techniques we used to extract actions from cooking
recipes. We argue that techniques taken from natural language processing are
required for this task, and that they give satisfactory results. An evaluation
based on our implemented prototype extracting workflows from recipe texts is
provided.


title: Learning and comparing functional connectomes across subjects

abstract:
  Functional connectomes capture brain interactions via synchronized
fluctuations in the functional magnetic resonance imaging signal. If measured
during rest, they map the intrinsic functional architecture of the brain. With
task-driven experiments they represent integration mechanisms between
specialized brain areas. Analyzing their variability across subjects and
conditions can reveal markers of brain pathologies and mechanisms underlying
cognition. Methods of estimating functional connectomes from the imaging signal
have undergone rapid developments and the literature is full of diverse
strategies for comparing them. This review aims to clarify links across
functional-connectivity methods as well as to expose different steps to perform
a group study of functional connectomes.


title: A family of rational maps with buried Julia components

abstract:
  It is known that the disconnected Julia set of any polynomial map does not
contain buried Julia components. But such Julia components may arise for
rational maps. The first example is due to Curtis T. McMullen who provided a
family of rational maps for which the Julia sets are Cantor of Jordan curves.
However all known examples of buried Julia components, up to now, are points or
Jordan curves and comes from rational maps of degree at least 5.
  This paper introduce a family of hyperbolic rational maps with disconnected
Julia set whose exchanging dynamics of postcritically separating Julia
components is encoded by a weighted dynamical tree. Each of these Julia sets
presents buried Julia components of several types: points, Jordan curves, but
also Julia components which are neither points nor Jordan curves. Moreover this
family contains some rational maps of degree 3 with explicit formula that
answers a question McMullen raised.


title: Infrared [Fe II] and Dust Emissions from Supernova Remnants

abstract:
  Supernova remnants (SNRs) are strong thermal emitters of infrared radiation.
The most prominent lines in the near-infrared spectra of SNRs are [Fe II]
lines. The [Fe II] lines are from shocked dense atomic gases, so they trace
SNRs in dense environments. After briefly reviewing the physics of the [Fe II]
emission in SNR shocks, I describe the observational results which show that
there are two groups of SNRs bright in [Fe II] emission: middle-aged SNRs
interacting with molecular clouds and young core-collapse SNRs in dense
circumstellar medium. The SNRs belonging to the former group are also bright in
near-infrared H$_2$ emission, indicating that both atomic and molecular shocks
are pervasive in these SNRs. The SNRs belonging to the latter group have
relatively small radii in general, implying that most of them are likely the
remnants of SN IIL/b or SN IIn that had strong mass loss before the explosion.
I also comment on the "[Fe II]-H$_2$ reversal" in SNRs and on using the [Fe
II]-line luminosity as an indicator of the supernova (SN) rate in galaxies. In
the mid- and far-infrared regimes, thermal dust emission is dominant. The dust
in SNRs can be heated either by collisions with gas species in a hot plasma or
by radiation from a shock front. I discuss the characteristics of the infrared
morphology of the SNRs interacting with molecular clouds and their dust heating
processes. Finally, I give a brief summary of the detection of SN dust and
crystalline silicate dust in SNRs.


title: On caustics by reflection of algebraic surfaces

abstract:
  Given a point S (the light position) in P^3 and an algebraic surface Z (the
mirror) of P^3, the caustic by reflection of Z from S is the Zariski closure of
the envelope of the reflected lines got by reflection of the incident lines
(Sm) on Z at m in Z. We use the ramification method to identify the caustic by
reflection with the Zariski closure of the image, by a rational map, of an
algebraic 2-covering space of Z. We also give a general formula for the degree
(with multiplicity) of caustics (by reflection) of algebraic surfaces.


title: Spin structures on 3-manifolds via arbitrary triangulations

abstract:
  Let M be an oriented compact 3-manifold and let T be a (loose) triangulation
of M, with ideal vertices at the components of the boundary of M and possibly
internal vertices. We show that any spin structure s on M can be encoded by
extra combinatorial structures on T. We then analyze how to change these extra
structures on T, and T itself, without changing s, thereby getting a
combinatorial realization, in the usual "objects/moves" sense, of the set of
all pairs (M,s). Our moves have a local nature, except one, that has a global
flavour but is explicitly described anyway. We also provide an alternative
approach where the global move is replaced by simultaneous local ones.


title: Thermodynamics of electron-hole liquids in graphene

abstract:
  The impact of renormalization of the electron spectrum on the chemical
potential, heat capacity, and oscillating magnetic moment is studied. The cases
of low and high temperatures are considered. At low temperatures, doped
graphene behaves as the usual Fermi liquids with the power temperature laws for
thermodynamic properties. However, at high temperatures and relatively low
carrier concentrations, it exhibits the collective electron-holes features: the
chemical potential tends to its value in the undoped case going with the
temperature to the charge neutrality point. Simultaneously, the electron
contribution into the heat capacity tends to the constant value, as in the case
of the Boltzmann statistics.


title:
Minimum Variance Estimation of a Sparse Vector within the Linear
  Gaussian Model: An RKHS Approach

abstract:
  We consider minimum variance estimation within the sparse linear Gaussian
model (SLGM). A sparse vector is to be estimated from a linearly transformed
version embedded in Gaussian noise. Our analysis is based on the theory of
reproducing kernel Hilbert spaces (RKHS). After a characterization of the RKHS
associated with the SLGM, we derive novel lower bounds on the minimum variance
achievable by estimators with a prescribed bias function. This includes the
important case of unbiased estimation. The variance bounds are obtained via an
orthogonal projection of the prescribed mean function onto a subspace of the
RKHS associated with the SLGM. Furthermore, we specialize our bounds to
compressed sensing measurement matrices and express them in terms of the
restricted isometry and coherence parameters. For the special case of the SLGM
given by the sparse signal in noise model (SSNM), we derive closed-form
expressions of the minimum achievable variance (Barankin bound) and the
corresponding locally minimum variance estimator. We also analyze the effects
of exact and approximate sparsity information and show that the minimum
achievable variance for exact sparsity is not a limiting case of that for
approximate sparsity. Finally, we compare our bounds with the variance of three
well-known estimators, namely, the maximum-likelihood estimator, the
hard-thresholding estimator, and compressive reconstruction using the
orthogonal matching pursuit.


title:
Fourier-Mukai Transforms and Bridgeland Stability Conditions on Abelian
  Threefolds

abstract:
  We show that the construction of Bayer, Bertram, Macri and Toda gives rise to
a Bridgeland stability condition on a principally polarized abelian threefold
with Picard rank one by establishing their conjectural generalized
Bogomolov-Gieseker inequality for certain tilt stable objects. We do this by
proving that a suitable Fourier-Mukai transform preserves the heart of a
particular conjectural stability condition. We also show that the only
reflexive sheaves with zero first and second Chern classes are the flat line
bundles.


title:
Minimal Ward-Takahashi Vertices and Pion Light Cone Distribution
  Amplitudes from Gauge Invariant, Nonlocal, Dynamical Quark Model

abstract:
  The gauge-invariant, nonlocal, dynamical quark model is proved to generate
the minimal vertices which satisfy the Ward-Takahashi identities. In the chiral
limit, the momentum-dependent quark self-energy results in a flat-like form
with some end point delta-funtions for the light-cone pion distribution
amplitudes, similarly found in the Nambu Jona-Lasino model with constant
constituent mass. The leading order nonzero pion and current quark masses
corrections lead concave type asymptotic-like form modifications to twist-2
pion distribution amplitude with end point pillars and twist-3 tensor pion
distribution amplitude above the flat-like form backgrounds. A by-product of
our investigation shows that the variable u appearing in pion light-cone
distribution amplitudes is just the standard Feynman parameter in the Feynman
parameter integrals; also chiral perturbation works well for these amplitudes.


title:
Galaxy And Mass Assembly (GAMA): The connection between metals,
  specific-SFR, and HI gas in galaxies: the Z-SSFR relation

abstract:
  We study the interplay between gas phase metallicity (Z), specific star
formation rate (SSFR) and neutral hydrogen gas (HI) for galaxies of different
stellar masses. Our study uses spectroscopic data from GAMA and SDSS star
forming galaxies, as well as HI-detection from the ALFALFA and GASS public
catalogues. We present a model based on the Z-SSFR relation that shows that at
a given stellar mass, depending on the amount of gas, galaxies will follow
opposite behaviours. Low-mass galaxies with a large amount of gas will show
high SSFR and low metallicities, while low-mass galaxies with small amounts of
gas will show lower SSFR and high metallicities. In contrast, massive galaxies
with a large amount of gas will show moderate SSFR and high metallicities,
while massive galaxies with small amounts of gas will show low SSFR and low
metallicities. Using ALFALFA and GASS counterparts, we find that the amount of
gas is related to those drastic differences in Z and SSFR for galaxies of a
similar stellar mass.


title:
The rise and fall of cosmical physics: notes for a history, ca.
  1850-1920

abstract:
  In the period from about 1890 to 1915 an interdisciplinary and unifying
research programme known as "cosmical physics" attracted much scientific and
public attention. It typically included aspects of the earth sciences (such as
magnetic storms and atmospheric electricity) combined with astronomical
subjects (such as the solar corona and cometary tails), but there was no
unanimity as to the precise meaning of cosmical physics, which collapsed after
World War I. The essay covers the history of cosmical physics as it unfolded in
particular in Germany, Austria, England and Scandinavia. Among the scientists
who contributed to the development of cosmical physics were Wilhelm Foerster
from Germany, Wilhelm Trabert from Austria, Kristian Birkeland from Norway and
Svante Arrhenius from Sweden. While cosmical physics did not usually involve a
cosmological dimension, both Birkeland and Arrhenius constructed cosmologies
based on their work on auroral and other phenomena.


title: Asymptotic effects of boundary perturbations in excitable systems

abstract:
  A Neumann problem in the strip for the Fitzhugh Nagumo system is consid-
ered. The transformation in a non linear integral equation permits to deduce a
priori estimates for the solution. A complete asymptotic analysis shows that
for large t the effects of the initial data vanish while the effects of bound-
ary disturbances depend on the properties of the data. When they are convergent
for large t, the solution is everywhere bounded; when theirs first derivatives
belong to L one too, the effects are vanishing.


title: An accelerated CLPSO algorithm

abstract:
  The particle swarm approach provides a low complexity solution to the
optimization problem among various existing heuristic algorithms. Recent
advances in the algorithm resulted in improved performance at the cost of
increased computational complexity, which is undesirable. Literature shows that
the particle swarm optimization algorithm based on comprehensive learning
provides the best complexity-performance trade-off. We show how to reduce the
complexity of this algorithm further, with a slight but acceptable performance
loss. This enhancement allows the application of the algorithm in time critical
applications, such as, real-time tracking, equalization etc.


title: Remarks on profinite groups having few open subgroups

abstract:
  Examples are given of profinite groups that are not strongly complete, and
have other `bad' properties, yet have only finitely many open subgroups of each
finite index. It is shown that a profinite group with the latter property must
be finite if it has finite exponent. The problem of characterizing strongly
complete groups in terms of their power subgroups is discussed.


title: Zeros of Pairs of Quadratic Forms

abstract:
  We prove the Hasse principle and weak approximation for varieties defined
over number fields by the nonsingular intersection of pairs of quadratic forms
in 8 variables. The argument develops work of Colliot-Thelene, Sansuc and
Swinnerton-Dyer, and centres on a purely local problem about forms which split
off 3 hyperbolic planes.


title:
Diffuse emission of TeV Neutrinos and Gamma-rays from young pulsars by
  Photo-meson interaction in the galaxy

abstract:
  It's generally believed that young and rapidly rotating pulsars are important
sites of particle's acceleration, in which protons can be accelerated to
relativistic energy above the polar cap region if the magnetic moment is
antiparallel to the spin axis($\vec{\mu}\cdot\vec{\Omega}<0$). To obtain the
galactic diffusive neutrinos and gamma-rays for TeV, firstly,we use Monte
Carlo(MC) method to generate a sample of young pulsars with ages less than
$10^6$ yrs in our galaxy ; secondly, the neutrinos and high-energy gamma-rays
can be produced through photomeson process with the interaction of energetic
protons and soft X-ray photons ($p+\gamma\rightarrow \Delta^+\rightarrow
n+\pi^+/p+\pi^0$) for single pulsar, and these X-ray photons come from the
neutron star surface. The results suggest that the diffusive TeV flux of
neutrinos are lower than background flux, which indicated it is difficult to be
detected by the current neutrino telescopes.


title: Lefschetz theorem for abelian fundamental group with modulus

abstract:
  We prove a Lefschetz hypersurface theorem for abelian fundamental groups
allowing wild ramification along some divisor. In fact, we show that
isomorphism holds if the degree of the hypersurface is large relative to the
ramification along the divisor.


title:
Generalization of different type integral inequalities for s-convex
  functions via fractional integrals

abstract:
  In this paper, a general integral identity for twice differentiable functions
is derived. By using of this identity, the author establish some new estimates
on Hermite-Hadamard type and Simpson type inequalities for s-convex via Riemann
Liouville fractional integral.


title:
Analyzing user behavior of the micro-blogging website Sinaweibo during
  hot social events

abstract:
  The spread and resonance of users' opinions on SinaWeibo, the most popular
micro-blogging website in China, are tremendously influential, having
significantly affected the processes of many real-world hot social events. We
select 21 hot events that were widely discussed on SinaWeibo in 2011, and do
some statistical analyses. Our main findings are that (i) male users are more
likely to be involved, (ii) messages that contain pictures and those posted by
verified users are more likely to be reposted, while those with URLs are less
likely, (iii) gender factor, for most events, presents no significant
difference in reposting likelihood.


title: Star Formation in Nuclear Rings of Barred Galaxies

abstract:
  Nuclear rings in barred galaxies are sites of active star formation. We use
hydrodynamic simulations to study temporal and spatial behavior of star
formation occurring in nuclear rings of barred galaxies where radial gas
inflows are triggered solely by a bar potential. The star formation recipes
include a density threshold, an efficiency, conversion of gas to star
particles, and delayed momentum feedback via supernova explosions. We find that
star formation rate (SFR) in a nuclear ring is roughly equal to the mass inflow
rate to the ring, while it has a weak dependence on the total gas mass in the
ring. The SFR typically exhibits a strong primary burst followed by weak
secondary bursts before declining to very small values. The primary burst is
associated with the rapid gas infall to the ring due to the bar growth, while
the secondary bursts are caused by re-infall of the ejected gas from the
primary burst. While star formation in observed rings persists episodically
over a few Gyr, the duration of active star formation in our models lasts for
only about a half of the bar growth time, suggesting that the bar potential
alone is unlikely responsible for gas supply to the rings. When the SFR is low,
most star formation occurs at the contact points between the ring and the dust
lanes, leading to an azimuthal age gradient of young star clusters. When the
SFR is large, on the other hand, star formation is randomly distributed over
the whole circumference of the ring, resulting in no apparent azimuthal age
gradient. Since the ring shrinks in size with time, star clusters also exhibit
a radial age gradient, with younger clusters found closer to the ring. The
cluster mass function is well described by a power law, with a slope depending
on the SFR. Giant gas clouds in the rings have supersonic internal velocity
dispersions and are gravitationally bound.


title:
Depth resolved grazing incidence scattering from the solid-liquid
  interface

abstract:
  We have applied small angle scattering in grazing incidence beam geometry on
a time-of-flight neutron instrument. Due to the broad wavelength distribution
provided for a specific incident beam angle the penetration depth of the
neutron beam is varied over a broad range in a single measurement. The near
surface structure of polymer micelles close to silicon substrates with distinct
surface energy is resolved. It is observed that the very near-surface structure
strongly depends on the surface coating whereas further away from the surface
bulk like ordering is found. A more pronounced ordering is found close to
surfaces with high surface energy.


title: Quantum limits on probabilistic amplifiers

abstract:
  An ideal phase-preserving linear amplifier is a deterministic device that
adds to an input signal the minimal amount of noise consistent with the
constraints imposed by quantum mechanics. A noiseless linear amplifier takes an
input coherent state to an amplified coherent state, but only works part of the
time. Such a device is actually better than noiseless, since the output has
less noise than the amplified noise of the input coherent state; for this
reason we refer to such devices as {\em immaculate}. Here we bound the working
probabilities of probabilistic and approximate immaculate amplifiers and
construct theoretical models that achieve some of these bounds. Our chief
conclusions are the following: (i) the working probability of any
phase-insensitive immaculate amplifier is very small in the phase-plane region
where the device works with high fidelity; (ii) phase-sensitive immaculate
amplifiers that work only on coherent states sparsely distributed on a
phase-plane circle centered at the origin can have a reasonably high working
probability.


title:
Multipoint Lax operator algebras. Almost-graded structure and central
  extensions

abstract:
  Recently, Lax operator algebras appeared as a new class of higher genus
current type algebras. Based on I.Krichever's theory of Lax operators on
algebraic curves they were introduced by I. Krichever and O. Sheinman. These
algebras are almost-graded Lie algebras of currents on Riemann surfaces with
marked points (in-points, out-points, and Tyurin points). In a previous joint
article of the author with Sheinman the local cocycles and associated
almost-graded central extensions are classified in the case of one in-point and
one out-point. It was shown that the almost-graded extension is essentially
unique. In this article the general case of Lax operator algebras corresponding
to several in- and out-points is considered. In a first step it is shown that
they are almost-graded. The grading is given by the splitting of the marked
points which are non-Tyurin points into in- and out-points. Next,
classification results both for local and bounded cocycles are shown. The
uniqueness theorem for almost-graded central extensions follows. For this
generalization additional techniques are needed which are presented in this
article.


title: When Matter Matters

abstract:
  We study a recently proposed scenario for the early universe: Subluminal
Galilean Genesis. We prove that without any other matter present in the
spatially flat Friedmann universe, the perturbations of the Galileon scalar
field propagate with a speed at most equal to the speed of light. This proof
applies to all cosmological solutions -- to the whole phase space.
  However, in a more realistic situation, when one includes any matter which is
not directly coupled to the Galileon, there always exists a region of phase
space where these perturbations propagate superluminally, indeed with
arbitrarily high speed. We illustrate our analytic proof with numerical
computations. We discuss the implications of this result for the possible UV
completion of the model.


title: A survey on energy efficiency for wireless mesh network

abstract:
  Reducing CO2 emissions is an important global environmental issue. Over the
recent years, wireless and mobile communications have increasingly become
popular with consumers. An increasingly popular type of wireless access is the
so-called Wireless Mesh Networks (WMNs) that provide wireless connectivity
through much cheaper and more flexible backhaul infrastructure compared with
wired solutions. Wireless Mesh Network (WMN) is an emerging new technology
which is being adopted as the wireless internetworking solution for the near
future. Due to increased energy consumption in the information and
communication technology (ICT) industries, and its consequent environmental
effects, energy efficiency has become a key factor to evaluate the performance
of a communication network. This paper mainly focuses on classification layer
of the largest existing approaches dedicated to energy conservation. It is also
discussing the most interesting works on energy saving in WMNs networks.


title: CP phase from Higgs's boundary condition

abstract:
  We propose a new mechanism to generate a CP phase originating from a
non-trivial Higgs vacuum expectation value in an extra dimension. A twisted
boundary condition for the Higgs doublet can produce an extra dimensional
coordinate-dependent vacuum expectation value containing a CP phase degree of
freedom. With this mechanism, we construct a phenomenological model on S^{1}
which can simultaneously and naturally explain the origins of the fermion
generations, the quark mass hierarchy and the structure of the
Cabibbo-Kobayashi-Maskawa matrix with the CP phase.


title:
On CW complexes supporting Eliahou-Kervaire type resolutions of Borel
  fixed ideals

abstract:
  We prove that the Eliahou-Kervaire resolution of a Cohen-Macaulay stable
monomial is supported by a regular CW complex whose underlying space is a
closed ball. We also show that the modified Eliahou-Kervaire resolutions of
variants of a Borel fixed ideal (e.g., a squarefree strongly stable ideal) are
supported by regular CW complexes, and their underlying spaces are closed balls
in the Cohen-Macaulay case.


title:
126 GeV Higgs boson and universality relations in the $SO(5) \times
  U(1)$ gauge-Higgs unification

abstract:
  The Higgs boson mass $m_H=126 $GeV in the $SO(5) \times U(1)$ gauge-Higgs
unification in the Randall-Sundrum space leads to important consequences. An
universal relation is found between the Kaluza-Klein (KK) mass scale $m_{KK}$
and the Aharonov-Bohm phase $\theta_H$ in the fifth dimension; $m_{KK} \sim
1350\,{\rm GeV}/(\sin \theta_H)^{0.787}$. The cubic and quartic self-couplings
of the Higgs boson become smaller than those in the SM, having universal
dependence on $\theta_H$. The decay rates $H \rightarrow \gamma \gamma, gg$ are
evaluated by summing contributions from KK towers. Corrections coming from KK
excited states turn out very small. With $\theta_H= 0.1 \sim 0.35$, the mass of
the first KK $Z$ is predicted to be $2.5 \sim 6 \, $TeV.


title:
Enzyme-Based Logic Analysis of Biomarkers at Physiological
  Concentrations: AND Gate with Double-Sigmoid "Filter" Response

abstract:
  We report the first realization of a biomolecular AND gate function with
double-sigmoid response (sigmoid in both inputs). Two enzyme biomarker inputs
activate the gate output signal which can then be used as indicating liver
injury, but only when both of these inputs have elevated pathophysiological
concentrations, effectively corresponding to logic-1 of the binary gate
functioning. At lower, normal physiological concentrations, defined as logic-0
inputs, the liver-injury output levels are not obtained. High-quality gate
functioning in handling of various sources of noise, on time scales of
relevance to potential applications is enabled by utilizing "filtering"
effected by a simple added biocatalytic process. The resulting gate response is
sigmoid in both inputs when proper system parameters are chosen, and the gate
properties are theoretically analyzed within a model devised to evaluate its
noise-handling properties.


title:
Virgin curve outside the envelope in isothermal M-H: a Comment on Nayak
  et al PRL 110 (2013) 127204 [arXiv:1302.5229]

abstract:
  This is a Comment on Nayak et al, Phys. Rev. Lett. 110 (2013) 127204
[arXiv:1302.5229]. This comments on one conclusion of that paper, and support
for the comment has now appeared.


title: Weak Orlicz-Hardy Martingale Spaces

abstract:
  In this paper, several weak Orlicz-Hardy martingale spaces associated with
concave functions are introduced, and some weak atomic decomposition theorems
for them are established. With the help of weak atomic decompositions, a
sufficient condition for a sublinear operator defined on the weak Orlicz-Hardy
martingale spaces to be bounded is given. Further, we investigate the duality
of weak Orlicz-Hardy martingale spaces and obtain a new John-Nirenberg type
inequality when the stochastic basis is regular. These results can be regarded
as weak versions of the Orlicz-Hardy martingale spaces due to Miyamoto, Nakai
and Sadasue.


title:
Least Mean Square/Fourth Algorithm with Application to Sparse Channel
  Estimation

abstract:
  Broadband signal transmission over frequency-selective fading channel often
requires accurate channel state information at receiver. One of the most
attracting adaptive channel estimation methods is least mean square (LMS)
algorithm. However, LMS-based method is often degraded by random scaling of
input training signal. To improve the estimation performance, in this paper we
apply the standard least mean square/fourth (LMS/F) algorithm to adaptive
channel estimation (ACE). Since the broadband channel is often described by
sparse channel model, such sparsity could be exploited as prior information.
First, we propose an adaptive sparse channel estimation (ASCE) method using
zero-attracting LMS/F (ZA-LMS/F) algorithm. To exploit the sparsity
effectively, an improved channel estimation method is also proposed, using
reweighted zero-attracting LMS/F (RZA-LMS/F) algorithm. We explain the reason
why sparse LMS/F algorithms using l_1-norm sparse constraint function can
improve the estimation performance by virtual of geometrical interpretation. In
addition, for different channel sparsity, we propose a Monte Carlo method to
select a regularization parameter for RA-LMS/F and RZA-LMS/F to achieve
approximate optimal estimation performance. Finally, simulation results show
that the proposed ASCE methods achieve better estimation performance than the
conventional one.


title: Comparative Study and Analysis of Variability Tools

abstract:
  The dissertation provides a comparative analysis of a number of variability
tools currently in use. It serves as a catalogue for practitioners interested
in the topic. We compare a range of modelling, configuring, and management
tools for product line engineering. The tools surveyed are compared against the
following criteria: functional, non-functional, governance issues and Technical
aspects. The outcome of the analysis is provided in tabular format.


title: Finite W-superalgebras and truncated super Yangians

abstract:
  We give a new proof of the fact that the super Yangian of general linear Lie
superalgebra is isomorphic to the finite W-superalgebra of the general linear
Lie superalgebra associated to a rectangular nilpotent element.


title:
Progress on Quantum Discord of Two Qubit states: Optimization and Upper
  Bound

abstract:
  Calculation of the quantum discord requires to find the minimum of the
quantum conditional entropy $S(\rho^{AB}|\{\Pi^B_{k}\})$ over all measurements
on the subsystem $B$. In this paper, we provide a simple relation for the
conditional entropy as the difference of two Shannon entropies. The relation is
suitable for calculation of the quantum discord in the sense that it can by
used to obtain the quantum discord for some classes of two-qubit states,
without the need for minimization. We also present an analytical procedure of
optimization and obtain conditions under which the quantum conditional entropy
of a general two-qubit state is stationary. The presented relation is also used
to find a tight upper bound on the quantum discord.


title: Single View Depth Estimation from Examples

abstract:
  We describe a non-parametric, "example-based" method for estimating the depth
of an object, viewed in a single photo. Our method consults a database of
example 3D geometries, searching for those which look similar to the object in
the photo. The known depths of the selected database objects act as shape
priors which constrain the process of estimating the object's depth. We show
how this process can be performed by optimizing a well defined target
likelihood function, via a hard-EM procedure. We address the problem of
representing the (possibly infinite) variability of viewing conditions with a
finite (and often very small) example set, by proposing an on-the-fly example
update scheme. We further demonstrate the importance of non-stationarity in
avoiding misleading examples when estimating structured shapes. We evaluate our
method and present both qualitative as well as quantitative results for
challenging object classes. Finally, we show how this same technique may be
readily applied to a number of related problems. These include the novel task
of estimating the occluded depth of an object's backside and the task of
tailoring custom fitting image-maps for input depths.


title:
Correlated diffusion of colloidal particles near a liquid-liquid
  interface

abstract:
  Optical microscopy and multi-particle tracking are used to investigate the
cross-correlated diffusion of quasi two-dimensional (2D) colloidal particles
near an oil-water interface. It is shown that the effect of the interface on
correlated diffusion is asymmetric. Along the line joining the centers of
particles, the amplitude of correlated diffusion coefficient ${D}_{\|}(r)$ is
enhanced by the interface, while the decay rate of ${D}_{\|}(r)$ is hardly
affected. At the direction perpendicular to the line, the decay rate of
${D}_{\bot}(r)$ is enhanced at short inter-particle separation $r$. This
enhancing effect fades at the long $r$. In addition, both $D_{\|}(r)$ and
$D_{\bot}(r)$ are independent of the colloidal area fraction $n$ at long $r$,
which indicates that the hydrodynamic interactions (HIs) among the particles
are dominated by that through the surrounding fluid at this region. However, at
short $r$, $D_{\bot}(r)$ is dependent on $n$, which suggests the HIs are more
contributed from the 2D particle monolayer self.


title: RGE of a Cold Dark Matter Two-Singlet Model

abstract:
  We study via the renormalization group equations at one-loop order the
perturbativity and vacuum stability of a two-singlet model of cold dark matter
(DM) that consists in extending the Standard Model with two real gauge-singlet
scalar fields. We then investigate the regions in the parameter space in which
the model is viable. For this, we require the model to reproduce the observed
DM relic density abundance, to comply with the measured XENON 100
direct-detection upper bounds, and to be consistent with the RGE perturbativity
and vacuum-stability criteria up to $40\mathrm{TeV}$. For small mixing angle
$\theta $ between the physical Higgs $h$ and auxiliary field, and DM-$h$ mutual
coupling constant $\lambda_{0}^{(4)}$, we find that the auxiliary-field mass is
confined to the interval $116\mathrm{GeV}-138\mathrm{GeV}$ while the DM mass is
mainly confined to the region above $57\mathrm{GeV}$. Increasing $\theta $
enriches the existing viability regions without relocating them, while
increasing $\lambda_{0}^{(4)}$ shrinks them with a tiny relocation. We show
that the model is consistent with the recent Higgs boson-like discovery by the
ATLAS and CMS experiments, while very light dark matter (masses below
$5\mathrm{GeV}$) is ruled out by the same experiments.


title: Elemental unbiased estimators for the Generalized Pareto tail

abstract:
  Unbiased location- and scale-invariant `elemental' estimators for the GPD
tail parameter are constructed. Each involves three log-spacings. The
estimators are unbiased for finite sample sizes, even as small as N=3. It is
shown that the elementals form a complete basis for unbiased location- and
scale-invariant estimators constructed from linear combinations of
log-spacings. Preliminary numerical evidence is presented which suggests that
elemental combinations can be constructed which are consistent estimators of
the tail parameter for samples drawn from the pure GPD family.


title: Modular Analysis of Almost Block Diagonal Systems of Equations

abstract:
  Almost block diagonal linear systems of equations can be exemplified by two
modules. This makes it possible to construct all sequential forms of band
and/or block elimination methods, six old and fourteen new. It allows easy
assessment of the methods on the basis of their operation counts, storage
needs, and admissibility of partial pivoting. It unveils a robust partial
pivoting strategy- local pivoting. Extension of modular analysis to bordered
systems is also included.


title:
Possible existence of viable models of bi-gravity with detectable
  graviton oscillations by gravitational wave detectors

abstract:
  We discuss graviton oscillations based on the ghost free bi-gravity theory.
We point out that this theory possesses a natural cosmological background
solution which is very close to the case of general relativity. Furthermore,
interesting parameter range of the graviton mass, which can be explored by the
observations of gravitational waves, is not at all excluded by the constraint
from the solar system tests. Therefore the graviton oscillation with possible
inverse chirp signal would be an interesting scientific target of KAGRA, adv
LIGO, adv Virgo and GEO.


title:
Mathisson-Papapetrou Equations as Conditions for Compatibility of
  General Relativity and Continuum Physics

abstract:
  In continuum physics is presupposed that general-relativistic balance
equations are valid which are created from the Lorentz-covariant ones by
application of the equivalence principle. Consequently, the question arises,
how to make these general-covariant balances compatible with Einstein's field
equations. The compatibility conditions are derived by performing a modified
Belinfante-Rosenfeld symmetrization for the non-symmetric and not
divergence-free general-relativistic energy-momentum tensor. The procedure
results in the Mathisson-Papapetrou equations.


title: Secant Zeta Functions

abstract:
  We study the series $\psi_s(z):=\sum_{n=1}^{\infty} \sec(n\pi z)n^{-s}$, and
prove that it converges under mild restrictions on $z$ and $s$. The function
possesses a modular transformation property, which allows us to evaluate
$\psi_{s}(z)$ explicitly at certain quadratic irrational values of $z$. This
supports our conjecture that $\pi^{-k} \psi_{k}(\sqrt{j})\in\mathbb{Q}$
whenever $k$ and $j$ are positive integers with $k$ even. We conclude with some
speculations on Bernoulli numbers.


title: Normal functions and spread of zero locus

abstract:
  If there is a topologically locally constant family of smooth algebraic
varieties together with an admissible normal function on the total space, then
the latter is constant on any fiber if this holds on some fiber. Combined with
spreading out, it implies for instance that an irreducible component of the
zero locus of an admissible normal function is defined over k if it has a
k-rational point where k is an algebraically closed subfield of the complex
number field with finite transcendence degree. This generalizes a result of F.
Charles that was shown in case the normal function is associated with an
algebraic cycle defined over k.


title:
Best-in-class and Strategic Benchmarking of Scientific Subject
  Categories of Web of Science in 2010

abstract:
  Here we show a novel technique for comparing subject categories, where the
prestige of academic journals in each category is represented statistically by
an impact-factor histogram. For each subject category we compute the
probability of occurrence of scholarly journals with impact factor in different
intervals. Here impact factor is measured with Thomson Reuters Impact Factor,
Eigenfactor Score, and Immediacy Index. Assuming the probabilities associated
with a pair of subject categories our objective is to measure the degree of
dissimilarity between them. To do so, we use an axiomatic characterization for
predicting dissimilarity between subject categories. The scientific subject
categories of Web of Science in 2010 were used to test the proposed approach
for benchmarking Cell Biology and Computer Science Information Systems with the
rest as two case studies. The former is best-in-class benchmarking that
involves studying the leading competitor category; the latter is strategic
benchmarking that involves observing how other scientific subject categories
compete.


title:
Long-range entanglement is necessary for a topological storage of
  quantum information

abstract:
  A general inequality between entanglement entropy and a number of
topologically ordered states is derived, even without using the properties of
the parent Hamiltonian or the formalism of topological quantum field theory.
Given a quantum state $\ket{\psi}$, we obtain an upper bound on the number of
distinct states that are locally indistinguishable from $\ket{\psi}$. The upper
bound is determined only by the entanglement entropy of some local subsystems.
As an example, we show that $\log N \leq 2\gamma$ for a large class of
topologically ordered systems on a torus, where $N$ is the number of
topologically protected states and $\gamma$ is the constant subcorrection term
of the entanglement entropy. We discuss applications to quantum many-body
systems that do not have any low-energy topological quantum field theory
description, as well as tradeoff bounds for general quantum error correcting
codes.


title:
FFLO or Majorana superfluids: The fate of fermionic cold atoms in
  spin-orbit coupled optical lattices

abstract:
  The recent experimental realization of spin-orbit coupling (SOC) for
ultra-cold atoms opens a completely new avenue for exploring new quantum
matter. In experiments, the SOC is implemented simultaneously with a Zeeman
field. Such spin-orbit coupled Fermi gases are predicted to support Majorana
fermions with non-Abelian exchange statistics in one dimension (1D). However,
as shown in recent theory and experiments for 1D spin-imbalanced Fermi gases,
the Zeeman field can lead to the long-sought Fulde-Ferrell-Larkin-Ovchinnikov
(FFLO) superfluids with non-zero momentum Cooper pairings, in contrast to the
zero momentum pairing in Majorana superfluids. Therefore a natural question to
ask is which phase, FFLO or Majorana superfluids, will survive in spin-orbit
coupled Fermi gases in the presence of a large Zeeman field. In this paper, we
address this question by studying the mean field quantum phases of 1D
(quasi-1D) spin-orbit coupled fermionic cold atom optical lattices.


title:
A Family of Multiple Harmonic Sum and Multiple Zeta Star Value
  Identities

abstract:
  In this paper we present a new family of identities for multiple harmonic
sums which generalize a recent result of Hessami Pilehrood et al. We then apply
it to obtain a family of identities relating multiple zeta star values to
alternating Euler sums. In such a typical identity the entries of the multiple
zeta star values consist of blocks of arbitrarily long 2-strings separated by
positive integers greater than two while the largest depth of the alternating
Euler sums depends only on the number of 2-string blocks but not on their
lengths.


title:
Rational curves, Dynkin diagrams and Fano manifolds with nef tangent
  bundle

abstract:
  A Fano manifold $X$ with nef tangent bundle is of flag-type if it has the
same type of elementary contractions as a complete flag manifold. In this paper
we present a method to associate a Dynkin diagram $\mathcal{D}(X)$ with any
such $X$, based on the numerical properties of its contractions. We then show
that $\mathcal{D}(X)$ is the Dynkin diagram of a semisimple Lie group. As an
application we prove that Campana-Peternell conjecture holds when $X$ is a
flag-type manifold whose Dynkin diagram is $A_n$ ($X$ is shown to be the
complete flag in $\mathbb{P}^n$).


title: Theory of Conductivity of Chiral Particles

abstract:
  In this methodology focused paper we scrutinize the application of the
band-coherent Boltzmann equation approach to calculating the conductivity of
chiral particles. As the ideal testing ground we use the two-band kinetic
Hamiltonian with an N-fold chiral twist that arise in a low-energy description
of charge carriers in rhombohedrally stacked multilayer graphene. To understand
the role of chirality in the conductivity of such particles we also consider
the artificial model with the chiral winding number decoupled from the power of
the dispersion. We first utilize the approximate but analytically solvable
band-coherent Boltzmann approach including the ill-understood principal value
terms that are a byproduct of several quantum-many body theory derivations of
Boltzmann collision integrals. Further on, we employ the finite-size Kubo
formula with the exact diagonalization of the total Hamiltonian perturbed by
disorder. Finally, we compare several choices of Ansatz in the derivation of
the Boltzmann equation according to the qualitative agreement between the
Boltzmann and Kubo conductivities. We find that the best agreement can be
reached in the approach where the principle value terms in the collision
integral are absent.


title:
Irradiated Interfaces in the Ara OB1, Carina, Eagle Nebula, and Cyg OB2
  Massive Star Formation Regions

abstract:
  Regions of massive star formation offer some of the best and most
easily-observed examples of radiation hydrodynamics. Boundaries where
fully-ionized H II regions transition to neutral/molecular photodissociation
regions (PDRs) are of particular interest because marked temperature and
density contrasts across the boundaries lead to evaporative flows and fluid
dynamical instabilities that can evolve into spectacular pillar-like
structures. When detached from their parent clouds, pillars become ionized
globules that often harbor one or more young stars. H2 molecules at the
interface between a PDR and an H II region absorb ultraviolet light from
massive stars, and the resulting fluoresced infrared emission lines are an
ideal way to trace this boundary independent of obscuring dust. This paper
presents H2 images of four regions of massive star formation that illustrate
different types of PDR boundaries. The Ara OB1 star formation region contains a
striking long wall that has several wavy structures which are present in H2,
but the emission is not particularly bright because the ambient UV fluxes are
relatively low. In contrast, the Carina star formation region shows strong H2
fluorescence both along curved walls and at the edges of spectacular pillars
that in some cases have become detached from their parent clouds. The
less-spectacular but more well-known Eagle Nebula has two regions that have
strong fluorescence in addition to its pillars. While somewhat older than the
other regions, Cyg OB2 has the highest number of massive stars of the regions
surveyed and contains many isolated, fluoresced globules that have head-tail
morphologies which point towards the sources of ionizing radiation. These
images provide a collection of potential astrophysical analogs that may relate
to ablated interfaces observed in laser experiments of radiation hydrodynamics.


title: Matrix-valued Monge-Kantorovich Optimal Mass Transport

abstract:
  We formulate an optimal transport problem for matrix-valued density
functions. This is pertinent in the spectral analysis of multivariable
time-series. The "mass" represents energy at various frequencies whereas, in
addition to a usual transportation cost across frequencies, a cost of rotation
is also taken into account. We show that it is natural to seek the
transportation plan in the tensor product of the spaces for the two
matrix-valued marginals. In contrast to the classical Monge-Kantorovich
setting, the transportation plan is no longer supported on a thin zero-measure
set.


title: Local Hardy-Littlewood maximal opeator in variable Lebesgue spaces

abstract:
  We investigate the class $\mathcal{B}^{loc}(\mathbb{R}^{n})$ of exponents
$p(\cdot)$ for with local Hardy-Littlewood maximal operator is bounded in
$L^{p(\cdot)}(\mathbb{R}^{n})$ space. Littlewood-Paley square-function
characterization of $L^{p(\cdot)}(\mathbb{R}^{n})$ spaces with the above class
of exponent are also obtained.


title:
Study of phase diagram and superconducting states in
  LaFeAsO$_{1-x}$H$_x$ based on the multiorbital extended Hubbard model

abstract:
  To understand the recently established unique magnetic and superconducting
phase diagram of LaFeAsO$_{1-x}$H$_x$, we analyze the realistic multiorbital
tight-binding model for $x=0 \sim 0.4$ beyond the rigid band approximation.
Both the spin and orbital susceptibilities are calculated in the presence of
the Coulomb and charge quadrupole interactions. It is found that both orbital
and spin fluctuations strongly develop at both $x \sim 0$ and 0.4, due to the
strong violation of the rigid band picture in LaFeAsO$_{1-x}$H$_x$. Based on
this result, we discuss the experimental phase diagram, especially the
double-dome superconducting phase. Moreover, we show that the quadrupole
interaction is effectively produced by the vertex correction due to Coulomb
interaction, resulting in the mutual development of spin and orbital
fluctuations.


title: The recursive Green's function method for graphene

abstract:
  We describe how to apply the recursive Green's function method to the
computation of electronic transport properties of graphene sheets and
nanoribbons in the linear response regime. This method allows for an amenable
inclusion of several disorder mechanisms at the microscopic level, as well as
inhomogeneous gating, finite temperature, and, to some extend, dephasing. We
present algorithms for computing the conductance, density of states, and
current densities for armchair and zigzag atomic edge alignments. Several
numerical results are presented to illustrate the usefulness of the method.


title:
Bidirectional Collision Detection and Faster Deterministic Isomorphism
  Testing

abstract:
  In this work, we introduce bidirectional collision detection --- a new
algorithmic tool that applies to the collision problems that arise in many
isomorphism problems. For the group isomorphism problem, we show that
bidirectional collision detection yields a deterministic n^((1 / 2) log n +
O(1)) time algorithm whereas previously the n^(log n + O(1))
generator-enumeration algorithm was the best result for several decades. For
the hard special case of solvable groups, we combine bidirectional collision
detection with methods from the author's previous work to obtain a
deterministic square-root speedup over the best previous algorithm. We also
show a deterministic square-root speedup over the best previous algorithm for
testing isomorphism of rings. We can even apply bidirectional collision
detection to the graph isomorphism problem to obtain a deterministic T^(1 /
sqrt(2)) speedup over the best previous deterministic algorithm. Although the
space requirements for our algorithms are greater than those for previous
deterministic isomorphism tests, we show time-space tradeoffs that interpolate
between the resource requirements of our algorithms and previous work.


title:
The redshift-evolution of the distribution of star formation among dark
  matter halos as seen in the infrared

abstract:
  [Abridged] Recent studies revealed a strong correlation between the star
formation rate (SFR) and stellar mass of star-forming galaxies, the so-called
star-forming main sequence. An empirical modeling approach (2-SFM) which
distinguishes between the main sequence and rarer starburst galaxies is capable
of reproducing most statistical properties of infrared galaxies. In this paper,
we extend this approach by establishing a connection between stellar mass and
halo mass with the technique of abundance matching. Based on a few, simple
assumptions and a physically motivated formalism, our model successfully
predicts the (cross-)power spectra of the cosmic infrared background (CIB), the
cross-correlation between CIB and cosmic microwave background (CMB) lensing,
and the correlation functions of bright, resolved infrared galaxies measured by
Herschel, Planck, ACT and SPT. We use this model to infer the redshift
distribution these observables, as well as the level of correlation between
CIB-anisotropies at different wavelengths. We also predict that more than 90%
of cosmic star formation activity occurs in halos with masses between 10^11.5
and 10^13.5 Msun. Taking into account subsequent mass growth of halos, this
implies that the majority of stars were initially (at z>3) formed in the
progenitors of clusters, then in groups at 0.5<z<3 and finally in
Milky-Way-like halos at z<0.5. At all redshifts, the dominant contribution to
the star formation rate density stems from halos of mass ~10^12 Msun, in which
the instantaneous star formation efficiency is maximal (~70%). The strong
redshift-evolution of SFR in the galaxies that dominate the CIB is thus
plausibly driven by increased accretion from the cosmic web onto halos of this
characteristic mass scale. Material available at
http://irfu.cea.fr/Sap/Phocea/Page/index.php?id=537.


title: Exploring the Outer Limits of Numerical Relativity

abstract:
  We perform several black-hole binary evolutions using fully nonlinear
numerical relativity techniques at separations large enough that low-order
post-Newtonian expansions are expected to be accurate. As a case study, we
evolve an equal-mass nonspinning black-hole binary from a quasicircular orbit
at an initial coordinate separation of D=100M for three different resolutions.
We find that the orbital period of this binary (in the numerical coordinates)
is T=6422M. The orbital motion agrees with post-Newtonian predictions to within
1%. Interestingly, we find that the time derivative of the coordinate
separation is dominated by a purely gauge effect leading to an apparent
contraction and expansion of the orbit at twice the orbital frequency. Based on
these results, we improved our evolution techniques and studied a set of black
hole binaries in quasi-circular orbits starting at D=20M, D=50M, and D=100M for
~ 5, 3, and 2 orbits, respectively. We find good agreement between the
numerical results and post-Newtonian predictions for the orbital frequency and
radial decay rate, radiated energy and angular momentum, and waveform amplitude
and phases. The results are relevant for the future computation of long-term
waveforms to assist in the detection and analysis of gravitational waves by the
next generation of detectors as well as the long-term simulations of black-hole
binaries required to accurately model astrophysically realistic circumbinary
accretion disks.

categories: gr-qc astro-ph.CO astro-ph.GA astro-ph.HE


title: On black hole thermodynamics from super Yang-Mills

abstract:
  We consider maximally supersymmetric U(N) Yang-Mills in (1+p)-dimensions for
p < 3. In the 't Hooft large N limit this is conjectured to be dual to N
Dp-branes in the decoupling limit. At low temperatures T << \lambda^{1/(3-p)}
governed by the dimensionful 't Hooft coupling \lambda, supergravity black
holes predict the free energy density goes as ~ N^2 T^{2(7-p)/(5-p)} and the
expectation value of the scalars goes as ~ T^{2/(5-p)}, with dimensions made up
by \lambda. The purpose of this work is to explain the origin of these peculiar
powers of temperature. We argue that these powers naturally arise by requiring
that the low energy moduli of the theory become strongly coupled at low
temperature. As an application, we consider the BMN quantum mechanics that
results from a supersymmetric deformation of the p=0 theory. The black holes
dual to this deformed theory have not yet been constructed, and our analysis
can be used to make an explicit prediction for their thermodynamic behaviour.


title:
Peculiarities of performance of the spin valve for the superconducting
  current

abstract:
  The spin valve effect for the superconducting current based on the
superconductor/ferromagnet proximity effect has been studied for a
CoO_x/Fe1/Cu/Fe2/Cu/Pb multilayer. The magnitude of the effect $\Delta T_c$ =
T_c^{AP} - T_c^{P}, where T_c^{P} and T_c^{AP} are the superconducting
transition temperatures for the parallel (P) and antiparallel (AP) orientation
of magnetizations, respectively, has been measured for different thicknesses of
the Fe1 layer d_{Fe1}. The obtained dependence of the effect on d_{Fe1} reveals
that $\Delta T_c$ can be increased in comparison with the case of a
half-infinite Fe1 layer considered by the previous theory. A maximum of the
spin valve effect occurs at d_{Fe1} ~ d_{Fe2}. At the optimal value of d_{Fe1},
almost full switching from the normal to the superconducting state when
changing the mutual orientation of magnetizations of the iron layers Fe1 and
Fe2 from P to AP is demonstrated.


title: Unveiling the link between logical fallacies and web persuasion

abstract:
  In the last decade Human-Computer Interaction (HCI) has started to focus
attention on forms of persuasive interaction where computer technologies have
the goal of changing users behavior and attitudes according to a predefined
direction. In this work, we hypothesize a strong connection between logical
fallacies (forms of reasoning which are logically invalid but cognitively
effective) and some common persuasion strategies adopted within web
technologies. With the aim of empirically evaluating our hypothesis, we carried
out a pilot study on a sample of 150 e-commerce websites.