publicationDate stringlengths 1 2.79k | title stringlengths 1 36.5k ⌀ | abstract stringlengths 1 37.3k ⌀ | id stringlengths 9 47 |
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2019-06-27 | Indications for Dzyaloshinskii-Moriya Interaction at the Pd/Fe Interface Studied by \textit{In Situ} Polarized Neutron Reflectometry | Using \textit{in situ} polarized neutron reflectometry, the depth resolved
evolution of the magnetism and structure in a Pd/Fe/Pd trilayer thin-film is
measured during growth. The initial film structure of Pd/Fe shows a small
proximity induced magnetism in the underlayer and a magnetization in the Fe
layer of $\approx1... | 1906.11532v1 |
2019-07-01 | Robust Formation of Ultrasmall Room-Temperature Neél Skyrmions in Amorphous Ferrimagnets from Atomistic Simulations | Ne\'el skyrmions originate from interfacial Dzyaloshinskii Moriya interaction
(DMI). Recent studies have explored using thin-film ferromagnets and
ferrimagnets to host Ne\'el skyrmions for spintronic applications. However, it
is unclear if ultrasmall (10 nm or less) skyrmions can ever be stabilized at
room temperature ... | 1907.00647v1 |
2019-07-03 | Effect of Zeeman coupling on the Majorana vortex modes in iron-based topological superconductors | In the superconducting regime of FeTe$_{(1-x)}$Se$_x$, there exist two types
of vortices which are distinct by the presence or absence of zero energy states
in their core. To understand their origin, we examine the interplay of Zeeman
coupling and superconducting pairings in three-dimensional metals with band
inversion... | 1907.02077v2 |
2019-07-10 | Increasing Gender Diversity and Inclusion in Scientific Committees and Related Activities at STScI | We present a new initiative by the Women in Astronomy Forum at Space
Telescope Science Institute (STScI) to increase gender diversity and inclusion
in STScI's scientific committees and the activities they generate. This
initiative offers new and uniform guidelines on binary gender representation
goals for each committe... | 1907.04880v1 |
2019-07-19 | Sparse Recovery for Orthogonal Polynomial Transforms | In this paper we consider the following sparse recovery problem. We have
query access to a vector $\vx \in \R^N$ such that $\vhx = \vF \vx$ is
$k$-sparse (or nearly $k$-sparse) for some orthogonal transform $\vF$. The goal
is to output an approximation (in an $\ell_2$ sense) to $\vhx$ in sublinear
time. This problem ha... | 1907.08362v1 |
2019-08-28 | Interplay of spin and mass superfluidity in antiferromagnetic spin-1 BEC and bicirculation vortices | The paper investigates the coexistence and interplay of spin and mass
superfluidity in the antiferromagnetic spin-1 BEC. The hydrodynamical theory
describes the spin degree of freedom by the equations similar to the
Landau--Lifshitz--Gilbert theory for bipartite antiferromagnetic insulator. The
variables in the spin sp... | 1908.10633v2 |
2019-09-23 | The NASA Probe space mission concept, Cosmic Evolution Through UV Surveys (CETUS) | The mission concept, Cosmic Origins Through UV Surveys (CETUS) is an all-UV
space mission concept that was selected and funded by NASA for study in 2017.
The main capabilities of CETUS that even Hubble doesn't have are: (1)
wide-field (17.4'x17.4') imaging and spectroscopy of astronomical sources with
<0.5'' resolution... | 1909.10437v1 |
2019-09-25 | Towards an improved understanding of molecular evolution: the relative roles of selection, drift, and everything in between | A major goal of molecular evolutionary biology is to identify loci or regions
of the genome under selection versus those evolving in a neutral manner.
Correct identification allows accurate inference of the evolutionary process
and thus comprehension of historical and contemporary processes driving
phenotypic change an... | 1909.11490v4 |
2019-10-08 | Correlated fluctuations in spin orbit torque-coupled perpendicular nanomagnets | Low barrier nanomagnets have attracted a lot of research interest for their
use as sources of high quality true random number generation. More recently,
low barrier nanomagnets with tunable output have been shown to be a natural
hardware platform for unconventional computing paradigms such as probabilistic
spin logic. ... | 1910.03184v1 |
2019-10-09 | Prophets, Secretaries, and Maximizing the Probability of Choosing the Best | Suppose a customer is faced with a sequence of fluctuating prices, such as
for airfare or a product sold by a large online retailer. Given distributional
information about what price they might face each day, how should they choose
when to purchase in order to maximize the likelihood of getting the best price
in retros... | 1910.03798v1 |
2019-10-24 | Order and Information in the Patterns of Spinning Magnetic Micro-disks at the Air-water Interface | The application of the Shannon entropy to study the relationship between
information and structures has yielded insights into molecular and material
systems. However, the difficulty in directly observing and manipulating atoms
and molecules hampers the ability of these systems to serve as model systems
for further expl... | 1910.11226v3 |
2019-11-15 | A geometric look at MHD and the Braginsky dynamo | This paper considers magnetohydrodynamics (MHD) and some of its applications
from the perspective of differential geometry, considering the dynamics of an
ideal fluid flow and magnetic field on a general three-dimensional manifold,
equipped with a metric and an induced volume form. The benefit of this level of
abstract... | 1911.06592v2 |
2019-11-17 | Interfacial-Redox-Induced Tuning of Superconductivity in YBa$_{2}$Cu$_{3}$O$_{7-δ}$ | Solid state ionic approaches for modifying ion distributions in getter/oxide
heterostructures offer exciting potentials to control material properties. Here
we report a simple, scalable approach allowing for total control of the
superconducting transition in optimally doped YBa$_{2}$Cu$_{3}$O$_{7-{\delta}}$
(YBCO) film... | 1911.07275v1 |
2019-12-10 | Integration of Neural Network-Based Symbolic Regression in Deep Learning for Scientific Discovery | Symbolic regression is a powerful technique that can discover analytical
equations that describe data, which can lead to explainable models and
generalizability outside of the training data set. In contrast, neural networks
have achieved amazing levels of accuracy on image recognition and natural
language processing ta... | 1912.04825v2 |
2019-12-17 | New search for mirror neutron regeneration | The possibility of relatively fast neutron oscillations into a mirror neutron
state is not excluded experimentally when a mirror magnetic field is
considered. Direct searches for the disappearance of neutrons into mirror
neutrons in a controlled magnetic field have previously been performed using
ultracold neutrons, wi... | 1912.08264v1 |
2020-01-06 | Highly efficient spin orbit torque in Pt/Co/Ir multilayers with antiferromagnetic interlayer exchange coupling | We have studied the spin orbit torque (SOT) in Pt/Co/Ir multilayers with 3
repeats of the unit structure. As the system exhibits oscillatory interlayer
exchange coupling (IEC) with varying Ir layer thickness, we compare the SOT of
films when the Co layers are coupled ferromagnetically and
antiferromagnetically. SOT is ... | 2001.01454v1 |
2019-11-24 | Cybernetical Concepts for Cellular Automaton and Artificial Neural Network Modelling and Implementation | As a discipline cybernetics has a long and rich history. In its first
generation it not only had a worldwide span, in the area of computer modelling,
for example, its proponents such as John von Neumann, Stanislaw Ulam, Warren
McCulloch and Walter Pitts, also came up with models and methods such as
cellular automata an... | 2001.02037v3 |
2020-02-12 | Competition between magnetic order and charge localization in Na$_2$IrO$_3$ thin crystal devices | Spin orbit assisted Mott insulators such as sodium iridate (Na$_2$IrO$_3$)
have been an important subject of study in the recent years. In these
materials, the interplay of electronic correlations, spin-orbit coupling,
crystal field effects and a honeycomb arrangement of ions bring exciting ground
states, predicted in ... | 2002.04785v1 |
2020-02-13 | Electron Beam-Induced Nanopores in Bernal-Stacked Hexagonal Boron Nitride | Controlling the size and shape of nanopores in two-dimensional materials is a
key challenge in applications such as DNA sequencing, sieving, and quantum
emission in artificial atoms. We here investigate experimentally and
theoretically triangular vacancies in (unconventional) Bernal-stacked AB-h-BN
formed using a high-... | 2002.05795v3 |
2020-02-26 | Effect of chemical substitution on the skyrmion phase in Cu$_2$OSeO$_3$ | Magnetic skyrmions have been the focus of intense research due to their
unique qualities which result from their topological protections. Previous work
on Cu$_2$OSeO$_3$, the only known insulating multiferroic skyrmion material,
has shown that chemical substitution alters the skyrmion phase. We chemically
substitute Zn... | 2002.11827v1 |
2020-03-10 | Smart City IoT Services Creation through Large Scale Collaboration | Smart cities solutions are often monolithically implemented, from sensors
data handling through to the provided services. The same challenges are
regularly faced by different developers, for every new solution in a new city.
Expertise and know-how can be re-used and the effort shared. In this article we
present the met... | 2003.04843v1 |
2020-03-23 | Low Power Unsupervised Anomaly Detection by Non-Parametric Modeling of Sensor Statistics | This work presents AEGIS, a novel mixed-signal framework for real-time
anomaly detection by examining sensor stream statistics. AEGIS utilizes Kernel
Density Estimation (KDE)-based non-parametric density estimation to generate a
real-time statistical model of the sensor data stream. The likelihood estimate
of the senso... | 2003.10088v1 |
2020-03-30 | Efficient nonparametric inference on the effects of stochastic interventions under two-phase sampling, with applications to vaccine efficacy trials | The advent and subsequent widespread availability of preventive vaccines has
altered the course of public health over the past century. Despite this
success, effective vaccines to prevent many high-burden diseases, including
HIV, have been slow to develop. Vaccine development can be aided by the
identification of immun... | 2003.13771v2 |
2020-04-05 | Effects of the Affordable Care Act Dependent Coverage Mandate on Health Insurance Coverage for Individuals in Same-Sex Couples | A large body of research documents that the 2010 dependent coverage mandate
of the Affordable Care Act was responsible for significantly increasing health
insurance coverage among young adults. No prior research has examined whether
sexual minority young adults also benefitted from the dependent coverage
mandate, despi... | 2004.02296v1 |
2020-04-07 | A general framework for inference on algorithm-agnostic variable importance | In many applications, it is of interest to assess the relative contribution
of features (or subsets of features) toward the goal of predicting a response
-- in other words, to gauge the variable importance of features. Most recent
work on variable importance assessment has focused on describing the importance
of featur... | 2004.03683v2 |
2020-04-15 | Magic DIAMOND: Multi-Fascicle Diffusion Compartment Imaging with Tensor Distribution Modeling and Tensor-Valued Diffusion Encoding | Diffusion tensor imaging provides increased sensitivity to microstructural
tissue changes compared to conventional anatomical imaging but also presents
limited specificity. To tackle this problem, the DIAMOND model subdivides the
voxel content into diffusion compartments and draws from diffusion-weighted
data to estima... | 2004.07340v2 |
2020-04-16 | Measuring Human and Economic Activity from Satellite Imagery to Support City-Scale Decision-Making during COVID-19 Pandemic | The COVID-19 outbreak forced governments worldwide to impose lockdowns and
quarantines to prevent virus transmission. As a consequence, there are
disruptions in human and economic activities all over the globe. The recovery
process is also expected to be rough. Economic activities impact social
behaviors, which leave s... | 2004.07438v4 |
2020-04-16 | Subjectifying Objectivity: Delineating Tastes in Theoretical Quantum Gravity Research | Research in Theoretical Quantum Gravity has continued expansively even as it
has become detached from classic arbiters of research such as direct empirical
falsification. This makes it an interesting test case for social-scientific
theories of what motivates and mediates contemporary scientific research and
the nature ... | 2004.07450v2 |
2020-04-22 | Excitation of high-frequency magnon modes in magnetoelastic films by short strain pulses | Development of energy efficient techniques for generation of spin waves
(magnons) is important for implementation of low-dissipation spin-wave-based
logic circuits and memory elements. A promising approach to achieve this goal
is based on the injection of short strain pulses into ferromagnetic films with
a strong magne... | 2004.10838v1 |
2020-04-23 | Correlation-driven eightfold magnetic anisotropy in a two-dimensional oxide monolayer | Engineering magnetic anisotropy in two-dimensional systems has enormous
scientific and technological implications. The uniaxial anisotropy universally
exhibited by two-dimensional magnets has only two stable spin directions,
demanding 180 degrees spin switching between states. We demonstrate a novel
eightfold anisotrop... | 2004.10939v1 |
2020-04-27 | Dynamic Predictions of Postoperative Complications from Explainable, Uncertainty-Aware, and Multi-Task Deep Neural Networks | Accurate prediction of postoperative complications can inform shared
decisions regarding prognosis, preoperative risk-reduction, and postoperative
resource use. We hypothesized that multi-task deep learning models would
outperform random forest models in predicting postoperative complications, and
that integrating high... | 2004.12551v2 |
2020-05-08 | Tree! I am no Tree! I am a Low Dimensional Hyperbolic Embedding | Given data, finding a faithful low-dimensional hyperbolic embedding of the
data is a key method by which we can extract hierarchical information or learn
representative geometric features of the data. In this paper, we explore a new
method for learning hyperbolic representations by taking a metric-first
approach. Rathe... | 2005.03847v4 |
2020-07-08 | On the production of He$^+$ of solar origin in the solar wind | Solar wind measurements in the heliosphere are predominantly comprised of
protons, alphas, and minor elements in a highly ionized state. The majority of
low charge states, such as He$^{+}$, measured in situ are often attributed to
pick up ions of non-solar origin. However, through inspection of the velocity
distributio... | 2007.04402v2 |
2020-07-28 | Towers and the first-order theory of hyperbolic groups | This paper is devoted to the first-order theory of torsion-free hyperbolic
groups. One of its purposes is to review some results and to provide precise
and correct statements and definitions, as well as some proofs and new results.
A key concept is that of a tower (Sela) or NTQ system
(Kharlampovich-Myasnikov). We di... | 2007.14148v1 |
2020-08-13 | Prediction of magnetization dynamics in a reduced dimensional feature space setting utilizing a low-rank kernel method | We establish a machine learning model for the prediction of the magnetization
dynamics as function of the external field described by the
Landau-Lifschitz-Gilbert equation, the partial differential equation of motion
in micromagnetism. The model allows for fast and accurate determination of the
response to an external ... | 2008.05986v3 |
2020-07-20 | Artificial Intelligence is stupid and causal reasoning won't fix it | Artificial Neural Networks have reached Grandmaster and even super-human
performance across a variety of games: from those involving perfect-information
(such as Go) to those involving imperfect-information (such as Starcraft). Such
technological developments from AI-labs have ushered concomitant applications
across th... | 2008.07371v1 |
2020-08-19 | Dynamical decoupling in interacting systems: applications to signal-enhanced hyperpolarized readout | Methods that preserve coherence broadly impact all quantum information
processing and metrology applications. Dynamical decoupling methods accomplish
this by protecting qubits in noisy environments but are typically constrained
to the limit where the qubits themselves are non-interacting. Here we consider
the alternate... | 2008.08323v1 |
2020-08-30 | Microwave and spin transfer torque driven coherent control in ferromagnets | Coherent control is a method used to manipulate the state of matter using
oscillatory electromagnetic radiation which relies on the non-adiabatic
interaction. It is commonly applied in quantum processing applications. This
technique is interesting in the context of ferromagnetic materials because of
the ability to comb... | 2008.13139v3 |
2020-08-31 | Philosophy-Guided Modelling and Implementation of Adaptation and Control in Complex Systems | Control was from its very beginning an important concept in cybernetics.
Later on, with the works of W. Ross Ashby, for example, biological concepts
such as adaptation were interpreted in the light of cybernetic systems theory.
Adaptation is the process by which a system is capable of regulating or
controlling itself i... | 2009.00110v4 |
2020-09-02 | X-ray linear dichroic ptychography | Biominerals such as seashells, corals skeletons, bone, and enamel are
optically anisotropic crystalline materials with unique nano- and micro-scale
organization that translates into exceptional macroscopic mechanical
properties, providing inspiration for engineering new and superior biomimetic
structures. Here we use p... | 2009.01093v1 |
2020-09-18 | The effect of the surface magnetic anisotropy of the neodymium atoms on the coercivity in the neodymium permanent magnet | The Nd permanent magnet (Nd$_{2}$Fe$_{14}$B) is an indispensable material
used in modern energy conversion devices. The realization of high coercivity at
finite temperatures is a burning issue. One of the important ingredients for
controlling the coercive force is the surface property of magnetic grains. It
has been re... | 2009.08572v1 |
2020-09-18 | Information- and Coding-Theoretic Analysis of the RLWE Channel | Several cryptosystems based on the \emph{Ring Learning with Errors} (RLWE)
problem have been proposed within the NIST post-quantum cryptography
standardization process, e.g., NewHope. Furthermore, there are systems like
Kyber which are based on the closely related MLWE assumption. Both previously
mentioned schemes resu... | 2009.08681v3 |
2020-09-28 | Precise control of $J_\mathrm{eff}=1/2$ magnetic properties in Sr$_2$IrO$_4$ epitaxial thin films by variation of strain and thin film thickness | We report on a comprehensive investigation of the effects of strain and film
thickness on the structural and magnetic properties of epitaxial thin films of
the prototypal $J_\mathrm{eff}=1/2$ compound Sr$_2$IrO$_4$ by advanced X-ray
scattering. We find that the Sr$_2$IrO$_4$ thin films can be grown fully
strained up to... | 2009.13185v1 |
2020-10-03 | WinterLab: Developing a low-cost, portable experiment platform to encourage engagement in the electronics lab | Encouraging student engagement is a key aim in any educational setting, and
allowing students the freedom to pursue their own methods of solving problems
through independent experimentation has been shown to markedly improve this. In
many contexts, however, allowing students this flexibility in their learning is
hamper... | 2010.01426v2 |
2020-10-16 | Hyperspectral interference tomography of nacre | Structural characterization of biologically formed materials is essential for
understanding biological phenomena and their environment, and generating new
bio-inspired engineering concepts. For example, nacre -- formed by mollusks in
the ocean -- encodes local environmental conditions throughout its formation
and has e... | 2010.08170v1 |
2020-11-03 | Recent results for the Landau-Lifshitz equation | We give a survey on some recent results concerning the Landau-Lifshitz
equation, a fundamental nonlinear PDE with a strong geometric content,
describing the dynamics of the magnetization in ferromagnetic materials. We
revisit the Cauchy problem for the anisotropic Landau-Lifshitz equation,
without dissipation, for smoo... | 2011.01692v3 |
2020-11-10 | The Virtual Goniometer: A new method for measuring angles on 3D models of fragmentary bone and lithics | The contact goniometer is a commonly used tool in lithic and
zooarchaeological analysis, despite suffering from a number of shortcomings due
to the physical interaction between the measuring implement, the object being
measured, and the individual taking the measurements. However, lacking a simple
and efficient alterna... | 2011.04898v2 |
2020-11-17 | Competing energy scales in topological superconducting heterostructures | Artificially engineered topological superconductivity has emerged as a viable
route to create Majorana modes, exotic quasiparticles which have raised great
expectations for storing and manipulating information in topological quantum
computational schemes. The essential ingredients for their realization are spin
non-deg... | 2011.08812v1 |
2020-12-01 | Phase-field modeling of biomineralization in mollusks and corals: Microstructure vs. formation mechanism | While biological crystallization processes have been studied on the
microscale extensively, models addressing the mesoscale aspects of such
phenomena are rare. In this work, we investigate whether the phase-field theory
developed in materials science for describing complex polycrystalline
structures on the mesoscale ca... | 2012.00666v1 |
2020-12-02 | Symmetry of the Magnetoelastic Interaction of Rayleigh and Shear Horizontal Magnetoacoustic Waves in Nickel Thin Films on LiTaO$_3$ | We study the interaction of Rayleigh and shear horizontal surface acoustic
waves (SAWs) with spin waves in thin Ni films on a piezoelectric LiTaO$_3$
substrate, which supports both SAW modes simultaneously. Because Rayleigh and
shear horizontal modes induce different strain components in the Ni thin films,
the symmetri... | 2012.01055v2 |
2020-12-03 | Localization of Malaria Parasites and White Blood Cells in Thick Blood Smears | Effectively determining malaria parasitemia is a critical aspect in assisting
clinicians to accurately determine the severity of the disease and provide
quality treatment. Microscopy applied to thick smear blood smears is the de
facto method for malaria parasitemia determination. However, manual
quantification of paras... | 2012.01994v1 |
2020-12-05 | Age-Optimal Low-Power Status Update over Time-Correlated Fading Channel | In this paper, we consider transmission scheduling in a status update system,
where updates are generated periodically and transmitted over a Gilbert-Elliott
fading channel. The goal is to minimize the long-run average age of information
(AoI) at the destination under an average energy constraint. We consider two
pract... | 2012.02958v2 |
2020-11-30 | Procode: the Swiss Multilingual Solution for Automatic Coding and Recoding of Occupations and Economic Activities | Objective. Epidemiological studies require data that are in alignment with
the classifications established for occupations or economic activities. The
classifications usually include hundreds of codes and titles. Manual coding of
raw data may result in misclassification and be time consuming. The goal was to
develop an... | 2012.07521v1 |
2020-12-16 | Dynamic clay microstructures emerge via ion complexation waves | Clays control carbon, water and nutrient transport in the lithosphere,
promote cloud formation5 and lubricate fault slip through interactions among
hydrated mineral interfaces. Clay mineral properties are difficult to model
because their structures are disordered, curved and dynamic. Consequently,
interactions at the c... | 2012.09295v1 |
2020-12-17 | Age-optimal Scheduling over Hybrid Channels | We consider the problem of minimizing the age of information when a source
can transmit status updates over two heterogeneous channels. Our work is
motivated by recent developments in 5G mmWave technology, where transmissions
may occur over an unreliable but fast (e.g., mmWave) channel or a slow reliable
(e.g., sub-6GH... | 2012.09403v6 |
2020-12-21 | Variations on the Maiani-Testa approach and the inverse problem | We discuss a method to construct hadronic scattering and decay amplitudes
from Euclidean correlators, by combining the approach of a regulated inverse
Laplace transform with the work of Maiani and Testa. Revisiting the original
result, we observe that the key observation, i.e. that only threshold
scattering information... | 2012.11488v1 |
2021-01-13 | PID passivity-based droop control of power converters: Large-signal stability, robustness and performance | We present a full review of PID passivity-based controllers (PBC) applied to
power electronic converters, discussing limitations, unprecedented merits and
potential improvements in terms of large-signal stability, robustness and
performance. We provide four main contributions. The nominal case is first
considered and i... | 2101.05047v2 |
2021-02-15 | Recent Developments in Blockchain Technology and their Impact on Energy Consumption | The enormous power consumption of Bitcoin has led to undifferentiated
discussions in science and practice about the sustainability of blockchain and
distributed ledger technology in general. However, blockchain technology is far
from homogeneous - not only with regard to its applications, which now go far
beyond crypto... | 2102.07886v1 |
2021-03-11 | Toward the Next Generation of News Recommender Systems | This paper proposes a vision and research agenda for the next generation of
news recommender systems (RS), called the table d'hote approach. A table d'hote
(translates as host's table) meal is a sequence of courses that create a
balanced and enjoyable dining experience for a guest. Likewise, we believe news
RS should s... | 2103.06909v1 |
2021-03-16 | Machine learning methods for the prediction of micromagnetic magnetization dynamics | Machine learning (ML) entered the field of computational micromagnetics only
recently. The main objective of these new approaches is the automatization of
solutions of parameter-dependent problems in micromagnetism such as fast
response curve estimation modeled by the Landau-Lifschitz-Gilbert (LLG)
equation. Data-drive... | 2103.09079v2 |
2021-03-18 | Bounding the detection efficiency threshold in Bell tests using multiple copies of the maximally entangled two-qubit state carried by a single pair of particles | In this paper, we investigate the critical efficiency of detectors to observe
Bell nonlocality using multiple copies of the maximally entangled two-qubit
state carried by a single pair of particles, such as hyperentangled states, and
the product of Pauli measurements. It is known that in a
Clauser-Horne-Shimony-Holt (C... | 2103.10413v2 |
2021-04-05 | When Can Liquid Democracy Unveil the Truth? | In this paper, we investigate the so-called ODP-problem that has been
formulated by Caragiannis and Micha [10]. Here, we are in a setting with two
election alternatives out of which one is assumed to be correct. In ODP, the
goal is to organise the delegations in the social network in order to maximize
the probability t... | 2104.01828v1 |
2021-04-05 | Floquet prethermalization with lifetime exceeding 90s in a bulk hyperpolarized solid | We report the observation of long-lived Floquet prethermal states in a bulk
solid composed of dipolar-coupled $^{13}$C nuclei in diamond at room
temperature. For precessing nuclear spins prepared in an initial transverse
state, we demonstrate pulsed spin-lock Floquet control that prevents their
decay over multiple-minu... | 2104.01988v2 |
2021-04-14 | Generalized Simple Streaming Codes from MDS Codes | Streaming codes represent a packet-level FEC scheme for achieving reliable,
low-latency communication. In the literature on streaming codes, the
commonly-assumed Gilbert-Elliott channel model, is replaced by a more
tractable, delay-constrained, sliding-window (DCSW) channel model that can
introduce either random or bur... | 2104.07005v1 |
2021-04-22 | COVID-19 and Big Data: Multi-faceted Analysis for Spatio-temporal Understanding of the Pandemic with Social Media Conversations | COVID-19 has been devastating the world since the end of 2019 and has
continued to play a significant role in major national and worldwide events,
and consequently, the news. In its wake, it has left no life unaffected. Having
earned the world's attention, social media platforms have served as a vehicle
for the global ... | 2104.10807v1 |
2021-05-05 | exoplanet: Gradient-based probabilistic inference for exoplanet data & other astronomical time series | "exoplanet" is a toolkit for probabilistic modeling of astronomical time
series data, with a focus on observations of exoplanets, using PyMC3 (Salvatier
et al., 2016). PyMC3 is a flexible and high-performance model-building language
and inference engine that scales well to problems with a large number of
parameters. "e... | 2105.01994v2 |
2021-05-05 | Elemental Abundances in M31: Gradients in the Giant Stellar Stream | We analyze existing measurements of [Fe/H] and [$\alpha$/Fe] for individual
red giant branch (RGB) stars in the Giant Stellar Stream (GSS) of M31 to
determine whether spatial abundance gradients are present. These measurements
were obtained from low- ($R \sim 3000$) and moderate- ($R \sim 6000$)
resolution Keck/DEIMOS ... | 2105.02339v1 |
2021-05-17 | A Unified Adaptive Recoding Framework for Batched Network Coding | Batched network coding is a variation of random linear network coding which
has low computational and storage costs. In order to adapt to random
fluctuations in the number of erasures in individual batches, it is not optimal
to recode and transmit the same number of packets for all batches. Different
distributed optimi... | 2105.07614v2 |
2021-05-18 | Magnetic flux structuring of the quiet Sun internetwork. Center-to-limb analysis of solar-cycle variations | It is now well established that the quiet Sun contains in total more magnetic
flux than active regions and represents an important reservoir of magnetic
energy. But the nature and evolution of these fields remain largely unknown.
We investigate the solar-cycle and center-to-limb variations of magnetic-flux
structures... | 2105.08657v1 |
2021-05-21 | Hybrid Machine Learning for Scanning Near-field Optical Spectroscopy | The underlying physics behind an experimental observation often lacks a
simple analytical description. This is especially the case for scanning probe
microscopy techniques, where the interaction between the probe and the sample
is nontrivial. Realistic modeling to include the details of the probe is always
exponentiall... | 2105.10551v1 |
2021-05-26 | Contention Resolution with Predictions | In this paper, we consider contention resolution algorithms that are
augmented with predictions about the network. We begin by studying the natural
setup in which the algorithm is provided a distribution defined over the
possible network sizes that predicts the likelihood of each size occurring. The
goal is to leverage... | 2105.12706v1 |
2021-05-27 | Balancing Static Vacuum Black Holes with Signed Masses in 4 and 5 Dimensions | We construct a new set of asymptotically flat, static vacuum solutions to the
Einstein equations in dimensions 4 and 5, which may be interpreted as a
superposition of positive and negative mass black holes. The resulting
spacetimes are axisymmetric in 4-dimensions and bi-axisymmetric in
5-dimensions, and are regular aw... | 2105.13260v2 |
2021-06-11 | Inference for treatment-specific survival curves using machine learning | In the absence of data from a randomized trial, researchers often aim to use
observational data to draw causal inference about the effect of a treatment on
a time-to-event outcome. In this context, interest often focuses on the
treatment-specific survival curves; that is, the survival curves were the
entire population ... | 2106.06602v1 |
2021-06-10 | Hard Choices in Artificial Intelligence | As AI systems are integrated into high stakes social domains, researchers now
examine how to design and operate them in a safe and ethical manner. However,
the criteria for identifying and diagnosing safety risks in complex social
contexts remain unclear and contested. In this paper, we examine the vagueness
in debates... | 2106.11022v1 |
2021-06-30 | A long-period substellar object exhibiting a single transit in Kepler | We report the detection of a single transit-like signal in the Kepler data of
the slightly evolved F star KIC4918810. The transit duration is ~45 hours, and
while the orbital period ($P\sim10$ years) is not well constrained, it is one
of the longest among companions known to transit. We calculate the size of the
transi... | 2107.00027v1 |
2021-07-02 | Scaling of Turbulent Viscosity and Resistivity: Extracting a Scale-dependent Turbulent Magnetic Prandtl Number | Turbulent viscosity $\nu_t$ and resistivity $\eta_t$ are perhaps the simplest
models for turbulent transport of angular momentum and magnetic fields,
respectively. The associated turbulent magnetic Prandtl number $Pr_t\equiv
\nu_t/\eta_t$ has been well recognized to determine the final magnetic
configuration of accreti... | 2107.00861v1 |
2021-07-24 | Dual-Attention Enhanced BDense-UNet for Liver Lesion Segmentation | In this work, we propose a new segmentation network by integrating DenseUNet
and bidirectional LSTM together with attention mechanism, termed as
DA-BDense-UNet. DenseUNet allows learning enough diverse features and enhancing
the representative power of networks by regulating the information flow.
Bidirectional LSTM is ... | 2107.11645v1 |
2021-08-03 | Comparative study of magnetic properties of Mn$^{3+}$ magnetic clusters in GaN using classical and quantum mechanical approach | Currently, simulations of many-body quantum systems are known to be
computationally too demanding to be solved on classical computers. The main
problem is that the computation time and memory necessary for performing the
calculations usually grow exponentially with the number of particles $N$. An
efficient approach to ... | 2108.01474v1 |
2021-08-06 | Performance trade-offs in cyber-physical control applications with multi-connectivity | Modern communication devices are often equipped with multiple wireless
communication interfaces with diverse characteristics. This enables exploiting
a form of multi-connectivity known as interface diversity to provide path
diversity with multiple communication interfaces. Interface diversity helps to
combat the proble... | 2108.03035v1 |
2021-08-16 | $Q$-ary non-overlapping codes: a generating function approach | Non-overlapping codes are a set of codewords in $\bigcup_{n \ge 2}
\mathbb{Z}_q^n$, where $\mathbb{Z}_q = \{0,1,\dots,q-1\}$, such that, the
prefix of each codeword is not a suffix of any codeword in the set, including
itself; and for variable-length codes, a codeword does not contain any other
codeword as a subword. I... | 2108.06934v1 |
2021-08-17 | Searching For or Reviewing Evidence Improves Crowdworkers' Misinformation Judgments and Reduces Partisan Bias | Can crowd workers be trusted to judge whether news-like articles circulating
on the Internet are misleading, or does partisanship and inexperience get in
the way? And can the task be structured in a way that reduces partisanship? We
assembled pools of both liberal and conservative crowd raters and tested three
ways of ... | 2108.07898v3 |
2021-08-23 | The Multiverse: Logical Modularity for Proof Assistants | Proof assistants play a dual role as programming languages and logical
systems. As programming languages, proof assistants offer standard modularity
mechanisms such as first-class functions, type polymorphism and modules. As
logical systems, however, modularity is lacking, and understandably so:
incompatible reasoning ... | 2108.10259v1 |
2021-08-27 | Distributed Control and Optimization of DC Microgrids: A Port-Hamiltonian Approach | This article proposes a distributed secondary control scheme that drives a dc
microgrid to an equilibrium point where the generators share optimal currents,
and their voltages have a weighted average of nominal value. The scheme does
not rely on the electric system topology nor its specifications; it guarantees
plug-an... | 2108.12341v1 |
2021-10-23 | Bootstrap percolation in random geometric graphs | Following Bradonji\'c and Saniee, we study a model of bootstrap percolation
on the Gilbert random geometric graph on the $2$-dimensional torus. In this
model, the expected number of vertices of the graph is $n$, and the expected
degree of a vertex is $a\log n$ for some fixed $a>1$. Each vertex is added with
probability... | 2110.12166v1 |
2021-11-02 | Orbital Dynamics and the Evolution of Planetary Habitability in the AU Mic System | The diversity of planetary systems that have been discovered are revealing
the plethora of possible architectures, providing insights into planet
formation and evolution. They also increase our understanding of system
parameters that may affect planetary habitability, and how such conditions are
influenced by initial c... | 2111.01816v1 |
2021-11-17 | Privacy-preserving Federated Learning for Residential Short Term Load Forecasting | With high levels of intermittent power generation and dynamic demand
patterns, accurate forecasts for residential loads have become essential. Smart
meters can play an important role when making these forecasts as they provide
detailed load data. However, using smart meter data for load forecasting is
challenging due t... | 2111.09248v4 |
2021-11-30 | The AiiDA-Spirit plugin for automated spin-dynamics simulations and multi-scale modelling based on first-principles calculations | Landau-Lifshitz-Gilbert (LLG) spin-dynamics calculations based on the
extended Heisenberg Hamiltonian is an important tool in computational materials
science involving magnetic materials. LLG simulations allow to bridge the gap
from expensive quantum mechanical calculations with small unit cells to large
supercells whe... | 2111.15229v1 |
2021-12-10 | A Framework for Fairness: A Systematic Review of Existing Fair AI Solutions | In a world of daily emerging scientific inquisition and discovery, the
prolific launch of machine learning across industries comes to little surprise
for those familiar with the potential of ML. Neither so should the congruent
expansion of ethics-focused research that emerged as a response to issues of
bias and unfairn... | 2112.05700v1 |
2021-12-12 | Effect of Topological Non-hexagonal Rings and Stone Wale Defects on the Vibrational Response of Single and Multi-Layer Ion Irradiated Graphene | Present study explores the observation of topological non-hexagonal rings
(NHR) and Stone Wale (SW) defects by Raman experiments in both single (SLG) and
multi-layer graphene (MLG) after they are irradiated with 100- 300 eV Ar ions.
Although predicted by theoretical studies, here it is experimentally shown for
the firs... | 2112.06294v1 |
2021-12-16 | Minimal blowing pressure allowing periodic oscillations in a model of bass brass instruments | In this study, an acoustic resonator -- a bass brass instrument -- with
multiple resonances coupled to an exciter -- the player's lips -- with one
resonance is modelled by a multidimensional dynamical system, and studied using
a continuation and bifurcation software. Bifurcation diagrams are explored with
respect to th... | 2112.08751v2 |
2021-12-20 | Refined modelling of the radio SZ signal: kinematic terms, relativistic temperature corrections and anisotropies in the radio background | A significant cosmological radio background will inevitably lead to a radio
Sunyaev-Zeldovich (SZ) effect. In the simplest limit, the combined signal from
the scattered radio and cosmic microwave background exhibits a null at around
$\nu \simeq 735$ MHz. Here, we show that kinematic and relativistic temperature
correct... | 2112.10666v2 |
2021-12-22 | Conductive and convective heat transfer in inductive heating of subsea buried pipelines | Inductive heating with high-voltage cables reduces the risk of hydrate
formation by raising the temperature of the production fluid in pipelines.
Heating the pipeline results in losing a certain fraction of the heat to the
surrounding soil through conduction or convection-dominated flow through the
soil. However, the a... | 2112.11826v1 |
2021-12-28 | Phonon, Electron, and Magnon Excitations in Antiferromagnetic L1$_{0}$-type MnPt | Antiferromagnetic L1$_{0}$-type MnPt is a material with relatively simple
crystal and magnetic structure, recently attracting interest due to its high
N{\'{e}}el temperature and wide usage as a pinning layer in magnetic devices.
While it is experimentally well characterized, the theoretical understanding is
much less d... | 2112.13954v1 |
2022-01-22 | Estimation and Hypothesis Testing of Strain-Specific Vaccine Efficacy with Missing Strain Types, with Applications to a COVID-19 Vaccine Trial | Statistical methods are developed for analysis of clinical and virus genetics
data from phase 3 randomized, placebo-controlled trials of vaccines against
novel coronavirus COVID-19. Vaccine efficacy (VE) of a vaccine to prevent
COVID-19 caused by one of finitely many genetic strains of SARS-CoV-2 may vary
by strain. Th... | 2201.08946v1 |
2022-01-30 | OverChain: Building a robust overlay with a blockchain | Blockchains use peer-to-peer networks for disseminating information among
peers, but these networks currently do not have any provable guarantees for
desirable properties such as Byzantine fault tolerance, good connectivity and
small diameter. This is not just a theoretical problem, as recent works have
exploited unsaf... | 2201.12809v1 |
2022-02-04 | Three-axis torque investigation of interfacial exchange coupling in a NiFe/CoO bilayer micromagnetic disk | Micrometer diameter bilayers of NiFe (permalloy, Py) and cobalt oxide (CoO)
deposited on nanomechanical resonators were used to investigate exchange bias
effects. The mechanical compliances of two resonator axes were enhanced by
severing one torsion arm, resulting in a unique three-axis resonator that
responds resonant... | 2202.02386v1 |
2022-02-11 | Choices, Risks, and Reward Reports: Charting Public Policy for Reinforcement Learning Systems | In the long term, reinforcement learning (RL) is considered by many AI
theorists to be the most promising path to artificial general intelligence.
This places RL practitioners in a position to design systems that have never
existed before and lack prior documentation in law and policy. Public agencies
could intervene o... | 2202.05716v1 |
2022-02-22 | Entropy-driven order in an array of nanomagnets | Long-range ordering is typically associated with a decrease in entropy. Yet,
it can also be driven by increasing entropy in certain special cases. We
demonstrate that artificial spin ice arrays of single-domain nanomagnets can be
designed to produce entropy-driven order. We focus on the tetris artificial
spin ice struc... | 2202.11010v1 |
2022-03-30 | Kinematics and Metallicity of Red Giant Branch Stars in the Northeast Shelf of M31 | We obtained Keck/DEIMOS spectra of 556 individual red giant branch stars in 4
spectroscopic fields spanning $13-31$ projected kpc along the Northeast (NE)
shelf of M31. We present the first detection of a complete wedge pattern in the
space of projected M31-centric radial distance versus line-of-sight velocity
for this... | 2203.16675v1 |
2022-04-06 | Stability and Safety through Event-Triggered Intermittent Control with Application to Spacecraft Orbit Stabilization | In systems where the ability to actuate is a scarce resource, e.g.,
spacecrafts, it is desirable to only apply a given controller in an
intermittent manner--with periods where the controller is on and periods where
it is off. Motivated by the event-triggered control paradigm, where
state-dependent triggers are utilized... | 2204.03110v1 |
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