publicationDate stringlengths 1 2.79k | title stringlengths 1 36.5k ⌀ | abstract stringlengths 1 37.3k ⌀ | id stringlengths 9 47 |
|---|---|---|---|
2007-12-01 | On Myopic Sensing for Multi-Channel Opportunistic Access: Structure, Optimality, and Performance | We consider a multi-channel opportunistic communication system where the
states of these channels evolve as independent and statistically identical
Markov chains (the Gilbert-Elliot channel model). A user chooses one channel to
sense and access in each slot and collects a reward determined by the state of
the chosen ch... | 0712.0035v3 |
2007-12-12 | Two-connected graphs with prescribed three-connected components | We adapt the classical 3-decomposition of any 2-connected graph to the case
of simple graphs (no loops or multiple edges). By analogy with the
block-cutpoint tree of a connected graph, we deduce from this decomposition a
bicolored tree tc(g) associated with any 2-connected graph g, whose white
vertices are the 3-compon... | 0712.1869v2 |
2008-03-13 | Optimal spatial transportation networks where link-costs are sublinear in link-capacity | Consider designing a transportation network on $n$ vertices in the plane,
with traffic demand uniform over all source-destination pairs. Suppose the cost
of a link of length $\ell$ and capacity $c$ scales as $\ell c^\beta$ for fixed
$0<\beta<1$. Under appropriate standardization, the cost of the minimum cost
Gilbert ne... | 0803.2037v1 |
2008-03-24 | Was the Andromeda Stream Produced by a Disk Galaxy? | The halo region of M31 exhibits a startling level of stellar inhomogeneities,
the most prominent of which is the "giant southern stream". Our previous
analysis indicates that this stream, as well as several other observed
features, are products of the tidal disruption of a single satellite galaxy
with stellar mass ~10^... | 0803.3476v2 |
2008-04-23 | Geometric dynamics of Vlasov kinetic theory and its moments | The Vlasov equation of kinetic theory is introduced and the Hamiltonian
structure of its moments is presented. Then we focus on the geodesic evolution
of the Vlasov moments. As a first step, these moment equations generalize the
Camassa-Holm equation to its multi-component version. Subsequently, adding
electrostatic fo... | 0804.3676v1 |
2008-05-05 | On Expanded Cyclic Codes | The paper has a threefold purpose. The first purpose is to present an
explicit description of expanded cyclic codes defined in $\GF(q^m)$. The
proposed explicit construction of expanded generator matrix and expanded parity
check matrix maintains the symbol-wise algebraic structure and thus keeps many
important original... | 0805.0615v2 |
2008-05-14 | Path Diversity over Packet Switched Networks: Performance Analysis and Rate Allocation | Path diversity works by setting up multiple parallel connections between the
end points using the topological path redundancy of the network. In this paper,
\textit{Forward Error Correction} (FEC) is applied across multiple independent
paths to enhance the end-to-end reliability. Network paths are modeled as
erasure Gi... | 0805.2185v1 |
2008-06-25 | HAT-P-9b: A Low Density Planet Transiting a Moderately Faint F star | We report the discovery of a planet transiting a moderately faint (V=12.3
mag) late F star, with an orbital period of 3.92289 +/- 0.00004 days. From the
transit light curve and radial velocity measurements we determine that the
radius of the planet is R_p = 1.40 +/- 0.06 R_Jup and that the mass is M_p =
0.78 +/- 0.09 M... | 0806.4008v2 |
2008-07-07 | Micropropagation of three genotypes of Indian mustard [{Brassica juncea} (L.) Czern.] using seedling-derived transverse thin cell layer (tTCL) explants | Micropropagation of three genotypes of Indian mustard [\textit{Brassica
juncea} (L.) Czern.] using 7-days old seedling-derived transverse thin cell
layer (tTCL) explants was accomplished.
The genotype, explant source and addition of silver nitrate to the medium
significantly influenced shoot bud induction. MS medium ... | 0807.1061v1 |
2008-07-18 | On Probability Distributions for Trees: Representations, Inference and Learning | We study probability distributions over free algebras of trees. Probability
distributions can be seen as particular (formal power) tree series [Berstel et
al 82, Esik et al 03], i.e. mappings from trees to a semiring K . A widely
studied class of tree series is the class of rational (or recognizable) tree
series which ... | 0807.2983v1 |
2008-11-02 | Stretch-Twist torus dynamo in compact Riemannian manifolds | Earlier Arnold, Zeldovich, Ruzmaikin and Sokoloff [\textbf{JETP (1982)}] have
computed the eigenvalue of a uniform stretching torus transformation which
result on the first Riemann metric solution of the dynamo action problem.
Recently some other attempts to obtain Riemann metrics representing dynamo
action through con... | 0811.0142v1 |
2008-11-21 | Geodesic dynamo chaotic flows and non-Anosov maps in twisted magnetic flux tubes | Recently Tang and Boozer [{\textbf{Phys. Plasmas (2000)}}], have investigated
the anisotropies in magnetic field dynamo evolution, from local Lyapunov
exponents, giving rise to a metric tensor, in the Alfven twist in magnetic flux
tubes (MFTs). Thiffeault and Boozer [\textbf{Chaos}(2001)] have investigated
the how the ... | 0811.3630v1 |
2008-12-03 | Gravitino Dark Matter and the Cosmic Lithium Abundances | Supersymmetric extensions of the standard model of particle physics assuming
the gravitino to be the lightest supersymmetric particle (LSP), and with the
next-to-LSP decaying to the gravitino during Big Bang nucleosynthesis, are
analyzed. Particular emphasis is laid on their potential to solve the "Li7
problem", an app... | 0812.0788v2 |
2009-01-26 | A Bayesian framework for estimating vaccine efficacy per infectious contact | In vaccine studies for infectious diseases such as human immunodeficiency
virus (HIV), the frequency and type of contacts between study participants and
infectious sources are among the most informative risk factors, but are often
not adequately adjusted for in standard analyses. Such adjustment can improve
the assessm... | 0901.4025v1 |
2009-01-28 | Theoretical characterization of a model of aragonite crystal orientation in red abalone nacre | Nacre, commonly known as mother-of-pearl, is a remarkable biomineral that in
red abalone consists of layers of 400-nm thick aragonite crystalline tablets
confined by organic matrix sheets, with the $(001)$ crystal axes of the
aragonite tablets oriented to within $\pm$ 12 degrees from the normal to the
layer planes. Rec... | 0901.4482v1 |
2009-02-07 | Partially-erupting prominences: a comparison between observations and model-predicted observables | AIM: To investigate several partially-erupting prominences to study their
relationship with other CME-associated phenomena and to compare these
observations with observables predicted by a model of partially-expelled flux
ropes (Gibson & Fan, 2006a, b).
METHODS: We have studied 6 selected events with partially-erupti... | 0902.1228v1 |
2009-03-03 | Proportional hazards models with continuous marks | For time-to-event data with finitely many competing risks, the proportional
hazards model has been a popular tool for relating the cause-specific outcomes
to covariates [Prentice et al. Biometrics 34 (1978) 541--554]. This article
studies an extension of this approach to allow a continuum of competing risks,
in which t... | 0903.0487v1 |
2009-03-06 | Five More Massive Binaries in the Cygnus OB2 Association | We present the orbital solutions for four OB spectroscopic binaries, MT145,
GSC 03161-00815, 2MASS J20294666+4105083, and Schulte 73, and the partial
orbital solution to the B spectroscopic binary, MT372, as part of an ongoing
study to determine the distribution of orbital parameters for massive binaries
in the Cygnus ... | 0903.1265v1 |
2009-03-16 | The Transit Light Curve Project. XII. Six Transits of the Exoplanet XO-2b | We present photometry of six transits of the exoplanet XO-2b. By combining
the light-curve analysis with theoretical isochrones to determine the stellar
properties, we find the planetary radius to be 0.996 +0.031/-0.018 rjup and the
planetary mass to be 0.565 +/- 0.054 mjup. These results are consistent with
those repo... | 0903.2687v1 |
2009-03-19 | Approximation of Bounds on Mixed Level Orthogonal Arrays | Mixed level orthogonal arrays are basic structures in experimental design. We
develop three algorithms that compute Rao and Gilbert-Varshamov type bounds for
mixed level orthogonal arrays. The computational complexity of the terms
involved in these bounds can grow fast as the parameters of the arrays increase
and this ... | 0903.3438v2 |
2009-04-16 | Good Concatenated Code Ensembles for the Binary Erasure Channel | In this work, we give good concatenated code ensembles for the binary erasure
channel (BEC). In particular, we consider repeat multiple-accumulate (RMA) code
ensembles formed by the serial concatenation of a repetition code with multiple
accumulators, and the hybrid concatenated code (HCC) ensembles recently
introduced... | 0904.2482v1 |
2009-10-10 | Multi-channel Opportunistic Access: A Case of Restless Bandits with Multiple Plays | This paper considers the following stochastic control problem that arises in
opportunistic spectrum access: a system consists of n channels (Gilbert-Elliot
channels)where the state (good or bad) of each channel evolves as independent
and identically distributed Markov processes. A user can select exactly k
channels to ... | 0910.1954v1 |
2010-03-12 | Anosov branches of dynamo spectra in one dimensional plasmas | Recently Guenther et al the globally diagonalized ${\alpha}^{2}$ dynamo
operator spectrum [J Phys A 2007) in mean field media, and its Krein space
related perturbation theory [J Phys A 2006). Earlier, an example of fast
dynamos in stretch shear and fold Anosov maps have been given by Gilbert [PRSA
[1993)). In this pape... | 1003.2482v1 |
2010-04-05 | A Prograde, Low-Inclination Orbit for the Very Hot Jupiter WASP-3b | We present new spectroscopic and photometric observations of the transiting
exoplanetary system WASP-3. Spectra obtained during two separate transits
exhibit the Rossiter-McLaughlin (RM) effect and allow us to estimate the
sky-projected angle between the planetary orbital axis and the stellar rotation
axis, lambda = 3.... | 1004.0692v2 |
2010-06-09 | NLTT 41135: a field M-dwarf + brown dwarf eclipsing binary in a triple system, discovered by the MEarth observatory | We report the discovery of an eclipsing companion to NLTT 41135, a nearby M5
dwarf that was already known to have a wider, slightly more massive common
proper motion companion, NLTT 41136, at 2.4 arcsec separation. Analysis of
combined-light and radial velocity curves of the system indicates that NLTT
41135B is a 31-34... | 1006.1793v1 |
2010-09-28 | Connectivity in Sub-Poisson Networks | We consider a class of point processes (pp), which we call {\em sub-Poisson};
these are pp that can be directionally-convexly ($dcx$) dominated by some
Poisson pp. The $dcx$ order has already been shown useful in comparing various
point process characteristics, including Ripley's and correlation functions as
well as sh... | 1009.5696v1 |
2010-10-23 | Closure method for spatially averaged dynamics of particle chains | We study the closure problem for continuum balance equations that model
mesoscale dynamics of large ODE systems. The underlying microscale model
consists of classical Newton equations of particle dynamics. As a mesoscale
model we use the balance equations for spatial averages obtained earlier by a
number of authors: Mu... | 1010.4832v1 |
2010-10-26 | Dualities and Identities for Entanglement-Assisted Quantum Codes | The dual of an entanglement-assisted quantum error-correcting (EAQEC) code is
the code resulting from exchanging the original code's information qubits with
its ebits. To introduce this notion, we show how entanglement-assisted (EA)
repetition codes and accumulator codes are dual to each other, much like their
classica... | 1010.5506v4 |
2010-11-12 | Magnetization Dynamics, Bennett Clocking and Associated Energy Dissipation in Multiferroic Logic | It has been recently shown that multiferroic logic - where logic bits are
encoded in the magnetization orientation of a nanoscale magnetostrictive layer
elastically coupled to a piezoelectric layer - can be Bennett clocked with
small electrostatic potentials of few tens of mV applied to the piezoelectric
layer. The pot... | 1011.2914v2 |
2010-12-30 | One-dimensional Gromov minimal filling | The present paper opens a new branch in the theory of variational problems
with branching extremals, the investigation of one-dimensional minimal fillings
of finite pseudo-metric spaces. On the one hand, this problem is a
one-dimensional version of a generalization of Gromov's minimal fillings
problem to the case of st... | 1101.0106v2 |
2011-02-02 | Kepler Input Catalog: Photometric Calibration and Stellar Classification | We describe the photometric calibration and stellar classification methods
used to produce the Kepler Input Catalog (KIC). The KIC is a catalog containing
photometric and physical data for sources in the Kepler Mission field of view;
it is used by the mission to select optimal targets. We derived atmospheric
extinction... | 1102.0342v2 |
2011-05-10 | Interstellar Solid Hydrogen | We consider the possibility that solid molecular hydrogen is present in
interstellar space. If so cosmic-rays and energetic photons cause ionisation in
the solid leading to the formation of H6+. This ion is not produced by
gas-phase reactions and its radiative transitions therefore provide a signature
of solid H2 in th... | 1105.1861v1 |
2011-05-12 | The History of Star Formation in Galaxy Disks in the Local Volume as Measured by the ACS Nearby Galaxy Survey Treasury | We present a measurement of the age distribution of stars residing in spiral
disks and dwarf galaxies. We derive a complete star formation history of the
~140 Mpc^3 covered by the volume-limited sample of galaxies in the Advanced
Camera for Surveys (ACS) Nearby Galaxy Survey Treasury (ANGST). The total star
formation r... | 1105.2571v1 |
2011-06-30 | Revisiting No-Scale Supergravity Inspired Scenarios: Updated Theoretical and Phenomenological Constraints | We consider no-scale inspired supergravity scenarios, where the gravitino
mass and related soft supersymmetry-breaking parameters are determined
dynamically by radiative corrections to an essentially flat tree-level
potential in the supersymmetry breaking hidden sector. We examine the
theoretical and phenomenological v... | 1106.6325v2 |
2012-02-21 | Making Evildoers Pay: Resource-Competitive Broadcast in Sensor Networks | Consider a time-slotted, single-hop, wireless sensor network (WSN) consisting
of n correct devices and and t=f*n Byzantine devices where f>=0 is any
constant; that is, the Byzantine devices may outnumber the correct ones. There
exists a trusted sender Alice who wishes to deliver a message m over a single
channel to the... | 1202.4576v4 |
2012-03-28 | Bispectrum of the Sunyaev-Zel'dovich Effect | We perform a detailed study of the bispectrum of the Sunyaev-Zel'dovich
effect. Using an analytical model for the pressure profiles of the intracluster
medium, we demonstrate the SZ bispectrum to be a sensitive probe of the
amplitude of the matter power spectrum parameter sigma_8. We find that the
bispectrum amplitude ... | 1203.6368v3 |
2012-05-01 | A quasi-analytical model for energy-delay-reliability tradeoff studies during write operations in perpendicular STT-RAM cell | One of the biggest challenges the current STT-RAM industry faces is
maintaining a high thermal stability while trying to switch within a given
voltage pulse and energy cost. In this paper, we present a physics based
analytical model that uses a modified Simmons' tunneling expression to capture
the spin dependent tunnel... | 1205.0183v1 |
2012-05-16 | Transients in porous media: asymptotic time-domain Green functions and limits of current frequency-domain models | Time domain responses of porous media have been studied by some authors, but
generally the possible descriptions have been given in the frequency domain.
The aim of this paper, limited to materials with rigid skeleton considered as
equivalent fluids, is to compare the descriptions by Johnson-Allard ($JA$%) as
well as b... | 1205.3775v2 |
2012-05-20 | Externally-driven transformations of vortex textures in flat submicrometer magnets | Two effects of oscillatory transformations of vortex textures in flat
nanomagnets due to the application of an external field or a spin-polarized
electric current are analytically described with relevance to soft-magnetic
structures of submicrometer sizes (whose thickness is significantly bigger than
the magnetostatic ... | 1205.5008v1 |
2012-06-11 | Multi-Gigabit Wireless data transfer at 60 GHz | In this paper we describe the status of the first prototype of the 60 GHz
wireless Multi-gigabit data transfer topology currently under development at
University of Heidelberg using IBM 130 nm SiGe HBT BiCMOS technology. The 60
GHz band is very suitable for high data rate and short distance applications as
for example ... | 1206.2287v1 |
2012-06-14 | On the Interpretation of the Foundations of Quantum Mechanics | This study discusses the quantum behavior of a particle, which is controlled
by fluctuations in the physical space-time (ST) variables, rather than provides
a novel interpretation of quantum theory. The fluctuations, i.e.,
inhomogeneities in a homogeneous phase ST, are prescribed by their probability.
They determine th... | 1206.2998v1 |
2012-08-08 | RMR-Efficient Randomized Abortable Mutual Exclusion | Recent research on mutual exclusion for shared-memory systems has focused on
"local spin" algorithms. Performance is measured using the "remote memory
references" (RMRs) metric. As common in recent literature, we consider a
standard asynchronous shared memory model with N processes, which allows atomic
read, write and ... | 1208.1723v1 |
2012-08-16 | QIRAL: A High Level Language for Lattice QCD Code Generation | Quantum chromodynamics (QCD) is the theory of subnuclear physics, aiming at
mod- eling the strong nuclear force, which is responsible for the interactions
of nuclear particles. Lattice QCD (LQCD) is the corresponding discrete
formulation, widely used for simula- tions. The computational demand for the
LQCD is tremendou... | 1208.4035v1 |
2012-08-22 | Entanglement Spectrum Classification of $C_n$-invariant Noninteracting Topological Insulators in Two Dimensions | We study the single particle entanglement spectrum in 2D topological
insulators which possess $n$-fold rotation symmetry. By defining a series of
special choices of subsystems on which the entanglement is calculated, or real
space cuts, we find that the number of protected in-gap states for each type of
these real spac... | 1208.4603v1 |
2012-09-25 | Multiscale modeling in micromagnetics: existence of solutions and numerical integration | Various applications ranging from spintronic devices, giant magnetoresistance
sensors, and magnetic storage devices, include magnetic parts on very different
length scales. Since the consideration of the Landau-Lifshitz-Gilbert equation
(LLG) constrains the maximum element size to the exchange length within the
media, ... | 1209.5548v2 |
2012-10-05 | Rapid Size-Controlled Synthesis of Dextran-Coated, 64Cu-Doped Iron Oxide Nanoparticles | Research into developing dual modality probes enabled for magnetic resonance
imaging (MRI) and positron emission tomography (PET) has been on the rise
recently due to the potential to combine the high resolution of MRI and the
high sensitivity of PET. Current synthesis techniques for developing multimodal
probes is lar... | 1210.1823v1 |
2012-10-05 | Rapid Microwave-Assisted Synthesis of Dextran-Coated Iron Oxide Nanoparticles for Magnetic Resonance Imaging | Currently, magnetic iron oxide nanoparticles are the only nano-sized magnetic
resonance imaging (MRI) contrast agents approved for clinical use, yet
commercial manufacturing of these agents has been limited or discontinued.
Though there is still widespread demand for these particles both for clinical
use and research, ... | 1210.1827v1 |
2012-10-16 | Dark Matter Substructure Detection Using Spatially Resolved Spectroscopy of Lensed Dusty Galaxies | We investigate how strong lensing of dusty, star-forming galaxies by
foreground galaxies can be used as a probe of dark matter halo substructure. We
find that spatially resolved spectroscopy of lensed sources allows dramatic
improvements to measurements of lens parameters. In particular we find that
modeling of the ful... | 1210.4562v1 |
2012-10-22 | Shared Information -- New Insights and Problems in Decomposing Information in Complex Systems | How can the information that a set ${X_{1},...,X_{n}}$ of random variables
contains about another random variable $S$ be decomposed? To what extent do
different subgroups provide the same, i.e. shared or redundant, information,
carry unique information or interact for the emergence of synergistic
information?
Recentl... | 1210.5902v1 |
2012-10-23 | Lensing Noise in mm-wave Galaxy Cluster Surveys | We study the effects of gravitational lensing by galaxy clusters of the
background of dusty star-forming galaxies (DSFGs) and the Cosmic Microwave
Background (CMB), and examine the implications for Sunyaev-Zel'dovich-based
(SZ) galaxy cluster surveys. At the locations of galaxy clusters, gravitational
lensing modifies ... | 1210.6354v1 |
2012-10-29 | Spin-Transfer Torque Magnetization Reversal in Uniaxial Nanomagnets with Thermal Noise | We consider the general Landau-Lifshitz-Gilbert (LLG) dynamical theory
underlying the magnetization switching rates of a thin film uniaxial magnet
subject to spin-torque effects and thermal fluctuations (thermal noise). After
discussing the various dynamical regimes governing the switching phenomena, we
present analyti... | 1210.7675v3 |
2012-12-06 | Splittings and automorphisms of relatively hyperbolic groups | We study automorphisms of a relatively hyperbolic group G. When G is
one-ended, we describe Out(G) using a preferred JSJ tree over subgroups that
are virtually cyclic or parabolic. In particular, when G is toral relatively
hyperbolic, Out(G) is virtually built out of mapping class groups and subgroups
of GL_n(Z) fixing... | 1212.1434v3 |
2013-01-23 | Localization, metabelian groups, and the isomorphism problem | If G and H are finitely generated, residually nilpotent metabelian groups, H
is termed para-G if there is a homomorphism of G into H which induces an
isomorphism between the corresponding terms of their lower central quotient
groups. We prove that this is an equivalence relation. It is a much coarser
relation than isom... | 1301.5533v2 |
2013-01-26 | Crystal nucleation and near-epitaxial growth in nacre | Nacre is a layered, iridescent lining found inside many mollusk shells, with
a unique brick-and-mortar periodic structure at the sub-micron scale, and
remarkable resistance to fracture. Despite extensive studies, it remains
unclear how nacre forms. Here we present 20-nm, 2{\deg}-resolution
Polarization-dependent Imagin... | 1301.6273v2 |
2013-02-03 | A generalization of variable elimination for separable inverse problems beyond least squares | In linear inverse problems, we have data derived from a noisy linear
transformation of some unknown parameters, and we wish to estimate these
unknowns from the data. Separable inverse problems are a powerful
generalization in which the transformation itself depends on additional unknown
parameters and we wish to determ... | 1302.0441v2 |
2013-04-05 | City versus wetland: Predicting urban growth in the Vecht area with a cellular automaton model | There are many studies dealing with the protection or restoration of wetlands
and the sustainable economic growth of cities as separate subjects. This study
investigates the conflict between the two in an area where city growth is
threatening a protected wetland area. We develop a stochastic cellular
automaton model fo... | 1304.1609v1 |
2013-04-22 | Topological Insulators with Commensurate Antiferromagnetism | We study the topological features of non-interacting insulators subject to an
antiferromangetic (AFM) Zeeman field, or AFM insulators, the period of which is
commensurate with the lattice period. These insulators can be classified by the
presence/absence of an emergent anti-unitary symmetry: the combined operation
of t... | 1304.6081v3 |
2013-05-17 | Spectral gap for stochastic energy exchange model with nonuniformly positive rate function | We give a lower bound on the spectral gap for a class of stochastic energy
exchange models. In 2011, Grigo et al. introduced the model and showed that,
for a class of stochastic energy exchange models with a uniformly positive rate
function, the spectral gap of an $N$-component system is bounded from below by
a functio... | 1305.4066v3 |
2013-08-18 | Layered Constructions for Low-Delay Streaming Codes | We propose a new class of error correction codes for low-delay streaming
communication. We consider an online setup where a source packet arrives at the
encoder every $M$ channel uses, and needs to be decoded with a maximum delay of
$T$ packets. We consider a sliding-window erasure channel --- $\cC(N,B,W)$ ---
which in... | 1308.3827v1 |
2013-08-31 | Delay Minimization for Instantly Decodable Network Coding in Persistent Channels with Feedback Intermittence | In this paper, we consider the problem of minimizing the multicast decoding
delay of generalized instantly decodable network coding (G-IDNC) over
persistent forward and feedback erasure channels with feedback intermittence.
In such an environment, the sender does not always receive acknowledgement from
the receivers af... | 1309.0145v2 |
2013-09-06 | Energy release from impacting prominence material following the 2011 June 7 eruption | Solar filaments exhibit a range of eruptive-like dynamic activity, ranging
from the full or partial eruption of the filament mass and surrounding magnetic
structure as a coronal mass ejection (CME), to a fully confined or 'failed'
eruption. On 2011 June 7, a dramatic partial eruption of a filament was
observed by multi... | 1309.1769v1 |
2013-09-26 | Constraints on a second planet in the WASP-3 system | There have been previous hints that the transiting planet WASP-3 b is
accompanied by a second planet in a nearby orbit, based on small deviations
from strict periodicity of the observed transits. Here we present 17 precise
radial velocity measurements and 32 transit light curves that were acquired
between 2009 and 2011... | 1309.6733v1 |
2013-09-28 | Synthetic Multiferroic Interconnects for Magnetic Logic Circuits | In this work, we consider the possibility of using synthetic multiferroics
comprising piezoelectric and magnetostrictive materials as an interconnect for
nano magnetic logic circuits. The proposed interconnect resembles a parallel
plate capacitor filled with a piezoelectric, where one of the plates is made of
a magneto... | 1309.7399v1 |
2013-10-01 | Ionized Plasma and Neutral Gas Coupling in the Sun's Chromosphere and Earth's Ionosphere/Thermosphere | We review our understanding of ionized plasma and neutral gas coupling in the
weakly ionized, stratified, electromagnetically-permeated regions of the Sun's
chromosphere and Earth's ionosphere/thermosphere. Using representative models
for each environment we derive fundamental descriptions of the coupling of the
consti... | 1310.0405v4 |
2013-11-13 | Excitation of radial collective modes in a quantum dot: Beyond linear response | We compare the response of five different models of two interacting electrons
in a quantum dot to an external short lived radial excitation that is strong
enough to excite the system well beyond the linear response regime. The models
considered describe the Coulomb interaction between the electrons in different
ways ra... | 1311.3252v2 |
2013-11-20 | Neutron-induced dpa, transmutations, gas production, and helium embrittlement of fusion materials | In a fusion reactor materials will be subjected to significant fluxes of
high-energy neutrons. As well as causing radiation damage, the neutrons also
initiate nuclear reactions leading to changes in the chemical composition of
materials (transmutation). Many of these reactions produce gases, particularly
helium, which ... | 1311.5079v1 |
2013-12-19 | The availability of research data declines rapidly with article age | Policies ensuring that research data are available on public archives are
increasingly being implemented at the government [1], funding agency [2-4], and
journal [5,6] level. These policies are predicated on the idea that authors are
poor stewards of their data, particularly over the long term [7], and indeed
many stud... | 1312.5670v1 |
2014-01-13 | On List-decodability of Random Rank Metric Codes | In the present paper, we consider list decoding for both random rank metric
codes and random linear rank metric codes. Firstly, we show that, for arbitrary
$0<R<1$ and $\epsilon>0$ ($\epsilon$ and $R$ are independent), if
$0<\frac{n}{m}\leq \epsilon$, then with high probability a random rank metric
code in $F_{q}^{m\ti... | 1401.2693v2 |
2014-01-30 | Quantitative Decoding of Interactions in Tunable Nanomagnet Arrays Using First Order Reversal Curves | To develop a full understanding of interactions in nanomagnet arrays is a
persistent challenge, critically impacting their technological acceptance. This
paper reports the experimental, numerical and analytical investigation of
interactions in arrays of Co nanoellipses using the first-order reversal curve
(FORC) techni... | 1401.7749v1 |
2014-02-07 | For-all Sparse Recovery in Near-Optimal Time | An approximate sparse recovery system in $\ell_1$ norm consists of parameters
$k$, $\epsilon$, $N$, an $m$-by-$N$ measurement $\Phi$, and a recovery
algorithm, $\mathcal{R}$. Given a vector, $\mathbf{x}$, the system approximates
$x$ by $\widehat{\mathbf{x}} = \mathcal{R}(\Phi\mathbf{x})$, which must satisfy
$\|\widehat... | 1402.1726v2 |
2014-03-11 | Measuring the power spectrum of dark matter substructure using strong gravitational lensing | In recent years, it has become possible to detect individual dark matter
subhalos near images of strongly lensed extended background galaxies.
Typically, only the most massive subhalos in the strong lensing region may be
detected this way. In this work, we show that strong lenses may also be used to
constrain the much ... | 1403.2720v3 |
2014-03-14 | Cosmological Spectral Deconvolution | One of the main goals of modern observational cosmology is to map the large
scale structure of the Universe. A potentially powerful approach for doing this
would be to exploit three-dimensional spectral maps, i.e. the specific
intensity of extragalactic light as a function of wavelength and direction on
the sky, to mea... | 1403.3727v1 |
2014-03-27 | On the Performance of Short Block Codes over Finite-State Channels in the Rare-Transition Regime | As the mobile application landscape expands, wireless networks are tasked
with supporting different connection profiles, including real-time traffic and
delay-sensitive communications. Among many ensuing engineering challenges is
the need to better understand the fundamental limits of forward error
correction in non-as... | 1403.7232v1 |
2014-04-08 | Cost-oblivious storage reallocation | Databases need to allocate and free blocks of storage on disk. Freed blocks
introduce holes where no data is stored. Allocation systems attempt to reuse
such deallocated regions in order to minimize the footprint on disk. If
previously allocated blocks cannot be moved, the problem is called the memory
allocation proble... | 1404.2019v3 |
2014-04-14 | Magneto-photonic phenomena at terahertz frequencies | Magneto-terahertz phenomena are the main focus of the thesis. This work
started as supporting research for the science of an X-ray laser (SwissFEL).
X-ray lasers have recently drawn great attention as an unprecedented tool for
scientific research on the ultrafast scale..... To answer this fundamental
question, we perfo... | 1404.3764v1 |
2014-05-13 | The Star Formation Histories of Local Group Dwarf Galaxies II. Searching For Signatures of Reionization | We search for signatures of reionization in the star formation histories
(SFHs) of 38 Local Group dwarf galaxies (10$^4$ $<$ M$_{\star}$ $<$ 10$^9$
M$_{\odot}$). The SFHs are derived from color-magnitude diagrams using archival
Hubble Space Telescope/Wide Field Planetary Camera 2 imaging. Only five
quenched galaxies (A... | 1405.3281v1 |
2014-05-26 | Constraints for the Progenitor Masses of 17 Historic Core-Collapse Supernovae | Using resolved stellar photometry measured from archival HST imaging, we
generate color-magnitude diagrams of the stars within 50 pc of the locations of
historic core-collapse supernovae that took place in galaxies within 8 Mpc. We
fit these color-magnitude distributions with stellar evolution models to
determine the b... | 1405.6626v1 |
2014-06-09 | Calibrating CHIME, A New Radio Interferometer to Probe Dark Energy | The Canadian Hydrogen Intensity Mapping Experiment (CHIME) is a transit
interferometer currently being built at the Dominion Radio Astrophysical
Observatory (DRAO) in Penticton, BC, Canada. We will use CHIME to map neutral
hydrogen in the frequency range 400 -- 800\,MHz over half of the sky, producing
a measurement of ... | 1406.2267v1 |
2014-07-10 | Beating the Heat! Automated Characterization of Piezoelectric Tubes for Starbugs | The Australian Astronomical Observatory has extensively prototyped a new
robotic positioner to allow simultaneous positioning of optical fibers at the
focal plane called 'Starbugs'. The Starbug devices each consist of two
concentric piezoelectric tubes that 'walk' the optical fiber over the focal
plane to accuracy of s... | 1407.2681v1 |
2014-07-16 | TriAnd and its Siblings: Satellites of Satellites in the Milky Way Halo | We explore the Triangulum-Andromeda (TriAnd) overdensity in the SPLASH
(Spectroscopic and Photometric Landscape of Andromeda's Stellar Halo) and SEGUE
(the Sloan Extension for Galactic Understanding and Exploration) spectroscopic
surveys. Milky Way main sequence turn-off stars in the SPLASH survey reveal
that the TriAn... | 1407.4458v2 |
2014-07-17 | The Green's Function for the Hückel (Tight Binding) Model | Applications of the H\"uckel (tight binding) model are ubiquitous in quantum
chemistry and solid state physics. The matrix representation of this model is
isomorphic to an unoriented vertex adjacency matrix of a bipartite graph, which
is also the Laplacian matrix plus twice the identity. In this paper, we
analytically ... | 1407.4780v4 |
2014-07-29 | Formation of magnetic skyrmions with tunable properties in PdFe bilayer deposited on Ir(111) | We perform an extensive study of the spin-configurations in a PdFe bilayer on
Ir(111) in terms of ab initio and spin-model calculations. We use the
spin-cluster expansion technique to obtain spin model parameters, and solve the
Landau-Lifshitz-Gilbert equations at zero temperature. In particular, we focus
on effects of... | 1407.7718v2 |
2014-08-14 | Developing Structural, High-heat flux and Plasma Facing Materials for a near-term DEMO Fusion Power Plant: the EU Assessment | The findings of the EU 'Materials Assessment Group' (MAG), within the 2012 EU
Fusion Roadmap exercise, are discussed. MAG analysed the technological
readiness of structural, plasma facing and high heat flux materials for a DEMO
concept to be constructed in the early 2030s, proposing a coherent strategy for
R&D up to a ... | 1408.3546v1 |
2014-08-26 | Weedy adaptation in Setaria spp.: IX. Effects of salinity, temperature, light and seed dormancy on Setaria faberi seed germination | Life in salty habitats is a function of tolerance to those chemicals at all
critical phases of a plant's life history. The ability to withstand salt as an
established plant may require different mechanisms and plant traits than those
needed to germinate in salty soils. Seeds establishing themselves in high salt
content... | 1408.6187v1 |
2014-09-02 | Accessing Different Spin-Disordered States using First Order Reversal Curves | Combined first order reversal curve (FORC) analyses of the magnetization
(M-FORC) and magnetoresistance (MR-FORC) have been employed to provide a
comprehensive study of the M-MR correlation in two canonical systems: a
NiFe/Cu/FePt pseudo spin-valve (PSV) and a [Co/Cu]8 multilayer. In the PSV, due
to the large differenc... | 1409.0825v1 |
2014-10-20 | Momentum space imaging of Cooper pairing in a half-Dirac-gas topological superconductor (a helical 2D topological superconductor) | Superconductivity in Dirac electrons has recently been proposed as a new
platform between novel concepts in high-energy and condensed matter physics. It
has been proposed that supersymmetry and exotic quasiparticles, both of which
remain elusive in particle physics, may be realized as emergent particles in
superconduct... | 1410.5405v1 |
2014-12-23 | Dynamical symmetries of Markov processes with multiplicative white noise | We analyse various properties of stochastic Markov processes with
multiplicative white noise. We take a single-variable problem as a simple
example, and we later extend the analysis to the Landau-Lifshitz-Gilbert
equation for the stochastic dynamics of a magnetic moment. In particular, we
focus on the non-equilibrium t... | 1412.7564v2 |
2015-01-09 | Random Triangle Theory with Geometry and Applications | What is the probability that a random triangle is acute? We explore this old
question from a modern viewpoint, taking into account linear algebra, shape
theory, numerical analysis, random matrix theory, the Hopf fibration, and much
much more. One of the best distributions of random triangles takes all six
vertex coordi... | 1501.03053v1 |
2015-02-03 | The use of covariates and random effects in evaluating predictive biomarkers under a potential outcome framework | Predictive or treatment selection biomarkers are usually evaluated in a
subgroup or regression analysis with focus on the treatment-by-marker
interaction. Under a potential outcome framework (Huang, Gilbert and Janes
[Biometrics 68 (2012) 687-696]), a predictive biomarker is considered a
predictor for a desirable treat... | 1502.00757v1 |
2015-02-03 | The Blackhole-Dark Matter Halo Connection | We explore the connection between the central supermassive blackholes (SMBH)
in galaxies and the dark matter halo through the relation between the masses of
the SMBHs and the maximum circular velocities of the host galaxies, as well as
the relationship between stellar velocity dispersion of the spheroidal
component and... | 1502.00775v1 |
2015-03-01 | Computing in continuous space with self-assembling polygonal tiles | In this paper we investigate the computational power of the polygonal tile
assembly model (polygonal TAM) at temperature 1, i.e. in non-cooperative
systems. The polygonal TAM is an extension of Winfree's abstract tile assembly
model (aTAM) which not only allows for square tiles (as in the aTAM) but also
allows for tile... | 1503.00327v2 |
2015-03-05 | Nonparametric Bounds and Sensitivity Analysis of Treatment Effects | This paper considers conducting inference about the effect of a treatment (or
exposure) on an outcome of interest. In the ideal setting where treatment is
assigned randomly, under certain assumptions the treatment effect is
identifiable from the observable data and inference is straightforward.
However, in other settin... | 1503.01598v1 |
2015-03-16 | Dynamics of Current and Field Driven Domain Wall Motion under the Influence of Transverse Magnetic Field | The dynamics of transverse Neel domain wall in a ferromagnetic nanostrip in
the presence of driving field, current and transverse magnetic field is
investigated by the Landau-Lifshitz-Gilbert(LLG) equation with the adiabatic
and non-adiabatic spin-transfer torques both analytically and numerically. The
analytical expre... | 1503.04560v2 |
2015-03-17 | Single Hit Energy-resolved Laue Diffraction | In-situ white light Laue diffraction has been successfully used to
interrogate the structure of single crystal materials undergoing rapid
(nanosecond) dynamic compression up to megabar pressures. However, information
on strain state accessible via this technique is limited, reducing its
applicability for a range of app... | 1503.05131v2 |
2015-03-24 | No variations in transit times for Qatar-1 b | The transiting hot Jupiter planet Qatar-1 b was presented to exhibit
variations in transit times that could be of perturbative nature. A hot Jupiter
with a planetary companion on a nearby orbit would constitute an unprecedented
planetary configuration, important for theories of formation and evolution of
planetary syst... | 1503.07191v1 |
2015-03-25 | Rigorous numerical study of strong microwave photon-magnon coupling in all-dielectric magnetic multilayers | We demonstrate theoretically a strong local enhancement of the intensity of
the in-plane microwave magnetic field in multilayered structures made from a
magneto-insulating yttrium iron garnet (YIG) layer sandwiched between two
non-magnetic layers with a high dielectric constant matching that of YIG. The
enhancement is ... | 1503.07282v1 |
2015-04-22 | Thermally Driven Ratchet Motion of Skyrmion Microcrystal and Topological Magnon Hall Effect | Spontaneously emergent chirality is an issue of fundamental importance across
the natural sciences. It has been argued that a unidirectional (chiral)
rotation of a mechanical ratchet is forbidden in thermal equilibrium, but
becomes possible in systems out of equilibrium. Here we report our finding that
a topologically ... | 1504.05860v1 |
2015-05-05 | Evaluating the Potential of a Dual Randomized Kaczmarz Solver for Laplacian Linear Systems | A new method for solving Laplacian linear systems proposed by Kelner et al.
involves the random sampling and update of fundamental cycles in a graph.
Kelner et al. proved asymptotic bounds on the complexity of this method but did
not report experimental results. We seek to both evaluate the performance of
this approach... | 1505.00875v3 |
2015-06-18 | Area-Delay-Energy Tradeoffs of Strain-Mediated Multiferroic Devices | Multiferroic devices hold profound promise for ultra-low energy computing in
beyond Moore's law era. The magnetization of a magnetostrictive
shape-anisotropic single-domain nanomagnet strain-coupled with a piezoelectric
layer in a multiferroic composite structure can be switched between its two
stable states (separated... | 1506.07859v1 |
2015-07-30 | Confirmation of the Planetary Microlensing Signal and Star and Planet Mass Determinations for Event OGLE-2005-BLG-169 | We present Hubble Space Telescope (HST) Wide Field Camera 3 (WFC3)
observations of the source and lens stars for planetary microlensing event
OGLE-2005-BLG-169, which confirm the relative proper motion prediction due to
the planetary light curve signal observed for this event. This (and the
companion Keck result) provi... | 1507.08661v1 |
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