cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Asteroseismology of rapidly rotating neutron stars - an alternative approach
Creators: name: Doneva, Daniela D.
name: Kokkotas, Kostas D.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In the present paper we examine gravitational wave asteroseismology relations for f-modes of rapidly rotating neutron stars. An approach different to the previous studies is employed - first, the moment of inertia is used instead of the stellar radius, and second, the normalization of the oscillation frequencies and damping times is different. It was shown that in the non-rotating case this can lead to a much stronger equation of state independence and our goal is to generalize the static relations to the rapidly rotating case and values of the spherical mode number $l\ge2$. We employ realistic equations of state that cover a very large range of stiffness in order to check better the universality of the relations. At the end we explore the inverse problem, i.e. obtain the neutron star parameters from the observed gravitational frequencies and damping times. It turns out that with this new set of relations we can solve the inverse problem with a very good accuracy using three frequencies that was not possible in the previous studies where one needs also the damping times. The asteroseismology relations are also particularly good for the massive rapidly rotating models that are subject to secular instabilities.
description: 3 figures, 4 tables
Products of sequentially compact spaces and compactness with respect to a set of filters
Creators: name: Lipparini, Paolo
Publisher: name: arXiv
Year: 2013
Subjects: subject: General Topology (math.GN)
subject: Logic (math.LO)
subject: FOS: Mathematics
subject: 54A20, 54B10, 54D20, 03E17

description: We show that, under suitably general formulations, covering properties, accumulation properties and filter convergence are all equivalent notions. This general correspondence is exemplified in the study of products. Let $X$ be a product of topological spaces. We prove that $X$ is sequentially compact if and only if all subproducts by $\leq \mathfrak s$ factors are sequentially compact. If $\mathfrak s = \mathfrak h$, then $X$ is sequentially compact if and only if all factors are sequentially compact and all but at most $<\mathfrak s$ factors are ultraconnected. We give a topological proof of the inequality ${\rm cf} \mathfrak s \geq \mathfrak h$. Recall that $\mathfrak s$ denotes the splitting number and $\mathfrak h$ the distributivity number. The product $X$ is Lindelöf if and only if all subproducts by $\leq ω_1 $ factors are Lindelöf. Parallel results are obtained for final $ ω_n$-compactness, $[ λ, μ]$-compactness, the Menger and Rothberger properties.
description: v3, entirely rewritten with many additions; v4, fixed some details; v5, a few improvements
Silk Painting and Other Stories
Creators: name: Bendixen, Melissa
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2014

description: Contents: Boats and Bridges; Buffer; The Eye of the Beholder; Fish in a Tank; Indians; Changing Times: Part I; Changing Times: Part II; Molten Glass; Shits and Giggles; Garrett and John; Naked; Every Boy and His Dog; Silk Painting
Observation of long-range elliptic anisotropies in $\sqrt{s}=$13 and 2.76 TeV $pp$ collisions with the ATLAS detector
Creators: name: ATLAS Collaboration
Publisher: name: arXiv
Year: 2015
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: ATLAS has measured two-particle correlations as a function of relative azimuthal-angle, $Δϕ$, and pseudorapidity, $Δη$, in $\sqrt{s}$=13 and 2.76 TeV $pp$ collisions at the LHC using charged particles measured in the pseudorapidity interval $|η|$<2.5. The correlation functions evaluated in different intervals of measured charged-particle multiplicity show a multiplicity-dependent enhancement at $Δϕ\sim 0$ that extends over a wide range of $Δη$, which has been referred to as the "ridge". Per-trigger-particle yields, $Y(Δϕ)$, are measured over 2
description: 10 pages plus author list + cover pages (26 pages total), 4 figures, no tables, published in Physical Review Letters, All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/HION-2015-09
Spikebench: An open benchmark for spike train time-series classification
Creators: name: Lazarevich, Ivan
name: Prokin, Ilya
name: Gutkin, Boris
name: Kazantsev, Victor
Publisher: name: arXiv
Year: 2018
Subjects: subject: Neurons and Cognition (q-bio.NC)
subject: Applications (stat.AP)
subject: FOS: Biological sciences
subject: FOS: Computer and information sciences

description: Modern well-performing approaches to neural decoding are based on machine learning models such as decision tree ensembles and deep neural networks. The wide range of algorithms that can be utilized to learn from neural spike trains, which are essentially time-series data, results in the need for diverse and challenging benchmarks for neural decoding, similar to the ones in the fields of computer vision and natural language processing. In this work, we propose a spike train classification benchmark, based on open-access neural activity datasets and consisting of several learning tasks such as stimulus type classification, animal's behavioral state prediction, and neuron type identification. We demonstrate that an approach based on hand-crafted time-series feature engineering establishes a strong baseline performing on par with state-of-the-art deep learning-based models for neural decoding. We release the code allowing to reproduce the reported results.
Spin-$1$ $J_1-J_2-J_3$ ferromagnetic Heisenberg model with an easy-plane crystal field on the cubic lattice: A bosonic approach
Creators: name: Carvalho, D. C.
name: Pires, A. S. T.
name: Mól, L. A. S.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We examine the phase diagram of the spin-$1$ $J_1-J_2-J_3$ ferromagnetic Heisenberg model with an easy-plane crystal field on the cubic lattice, in which $J_1$ is the ferromagnetic exchange interaction between nearest neighbors, $J_2$ is the antiferromagnetic exchange interaction between next-nearest neighbors and $J_3$ is the antiferromagnetic exchange interaction between next-next-nearest neighbors. Using the bond-operator formalism, we investigate the phase transitions between the disordered paramagnetic phase and the ordered ones. We show that the nature of the quantum phase transitions change as the frustration parameters ($\frac{J_2}{J_1}$, $\frac{J_3}{J_1}$) are varied. The zero-temperature phase diagram exhibits second- and first-order transitions, depending on the energy gap behavior. Remarkably, we find a disordered nonmagnetic phase, even in the absence of a crystal field, which is suggested to be a quantum spin liquid candidate. We also depict the phase diagram at finite temperature for some values of crystal field and frustration parameters.
The $P_2^1$ Margolis homology of connective topological modular forms
Creators: name: Bhattacharya, Prasit
name: Bobkova, Irina
name: Thomas, Brian
Publisher: name: arXiv
Year: 2018
Subjects: subject: Algebraic Topology (math.AT)
subject: FOS: Mathematics

description: The element $P_2^1$ of the mod 2 Steenrod algebra has the property $(P_2^1)^2=0$. This property allows one to view $P_2^1$ as a differential on $H_*(X, \mathbb{F}_2)$ for any spectrum $X$. Homology with respect to this differential, $\mathcal{M}(X, P_2^1)$, is called the $P_2^1$ Margolis homology of $X$. In this paper we give a complete calculation of the $P_2^1$ Margolis homology of the 2-local spectrum of topological modular forms $tmf$ and identify its $\mathbb{F}_2$ basis via an iterated algorithm. We apply the same techniques to calculate $P_2^1$ Margolis homology for any smash power of $tmf$.
Optical addressing of an individual erbium ion in silicon
Creators: name: Yin, Chunming
name: Rancic, Milos
name: de Boo, Gabriele G.
name: Stavrias, Nikolas
name: McCallum, Jeffrey C.
name: Sellars, Matthew J.
name: Rogge, Sven
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The detection of electron spins associated with single defects in solids is a critical operation for a range of quantum information and measurement applications currently under development. To date, it has only been accomplished for two centres in crystalline solids: phosphorus in silicon using electrical readout based on a single electron transistor (SET) and nitrogen-vacancy centres in diamond using optical readout. A spin readout fidelity of about 90% has been demonstrated with both electrical readout and optical readout, however, the thermal limitations of the electrical readout and the poor photon collection efficiency of the optical readout hinder achieving the high fidelity required for quantum information applications. Here we demonstrate a hybrid approach using optical excitation to change the charge state of the defect centre in a silicon-based SET, conditional on its spin state, and then detecting this change electrically. The optical frequency addressing in high spectral resolution conquers the thermal broadening limitation of the previous electrical readout and charge sensing avoids the difficulties of efficient photon collection. This is done with erbium in silicon and has the potential to enable new architectures for quantum information processing devices and to dramatically increase the range of defect centres that can be exploited. Further, the efficient electrical detection of the optical excitation of single sites in silicon is a major step in developing an interconnect between silicon and optical based quantum computing technologies.
description: Corrected the third affiliation. Corrected one cross-reference of "Fig. 3b" to "Fig. 3c". Corrected the caption of Fig. 3a by changing (+-)1 to 0
Magnet Simulations for ABRACADABRA
Creators: name: Salemi, Chiara P.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2017

description: The axion is a hypothetical particle that can solve the strong CP problem and that may be dark matter. The proposed experiment ABRACADABRA (A Broadband/Resonant Approach to Cosmic Axion Detection with an Amplifying B-field Ring Apparatus) hopes to find the axion through its coupling to a strong magnetic field. This coupling can be interpreted as an effective current inside a toroidal magnet that can then be amplified and detected via an inductively coupled SQUID. The inductive coupling can be either broadband or resonantly tuned to match the (as yet unknown) axion mass. The expected electromagnetic coupling of the axion in the searched mass range is very small (g[αγγ]≲10[-15] GeV[-1]) and so the experiment must be highly sensitive and all sources of noise must be examined and minimized. Before the experiment is built, a smaller, prototype version will be tested and the fields and possible noise sources are being simulated. This thesis presents simulations of various magnet designs and explores their effect on the resulting magnetic fields.
Boron nitride monolayer growth on vicinal Ni(111) surfaces systematically studied with a curved crystal
Creators: name: Fernandez, L.
name: Makarova, A. A.
name: Laubschat, C.
name: Vyalikh, D. V.
name: Usachov, D. Yu.
name: Ortega, J. E.
name: Schiller, F.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The structural and electronic properties of hexagonal boron nitride (hBN) grown on stepped Ni surfaces are systematically investigated using a cylindrical Ni crystal as a tunable substrate. Our experiments reveal homogeneous hBN monolayer coating of the entire Ni curved surface, which in turn undergoes an overall faceting. The faceted system is defined by step-free hBN/Ni(111) terraces alternating with strongly tilted hBN/Ni(115) or hBN/Ni(110) nanostripes, depending on whether we have A-type or B-type vicinal surfaces, respectively. Such deep substrate self-organization is explained by both the rigidity of the hBN lattice and the lack of registry with Ni crystal planes in the vicinity of the (111) surface. The analysis of the electronic properties by photoemission and absorption spectroscopies reveal a weaker hBN/Ni interaction in (110)- and (115)-oriented facets, as well as an upward shift of the valence band with respect to the band position at the hBN/Ni(111) terrace.
description: 18 pages, 5 figures
Asteroids and the James Webb Space Telescope
Creators: name: Rivkin, Andrew S.
name: Marchis, Franck
name: Stansberry, John A.
name: Takir, Driss
name: Thomas, Cristina
name: Group, the JWST Asteroids Focus
Publisher: name: arXiv
Year: 2015
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: The James Webb Space Telescope (JWST) provides the opportunity for ground-breaking observations of asteroids. It covers wavelength regions that are unavailable from the ground, and does so with unprecedented sensitivity. The main-belt and Trojan asteroids are all observable at some point in the JWST lifetime. We present an overview of the capabilities for JWST and how they apply to the asteroids as well as some short science cases that take advantage of these capabilities.
description: This paper is one of a series for a special issue in PASP. Accepted 10/14/15
Feasibility, training, and evidence for partner and self-delivered massage interventions: A Systematic Review
Creators: name: Nemati, Donya
name: Munk, Niki
name: Johnson, Alisa
name: Hinrichs, Rachel
name: Lauche, Romy
Publisher: name: Open Science Framework
Year: 2022
Subjects: subject: Medicine and Health Sciences
subject: Rehabilitation and Therapy
subject: Massage therapy
subject: Partner-delivered massage
subject: Self-delivered massage
subject: Systematic review

description: We seek to answer several key questions with this systematic review of researched self- and partner-delivered massage interventions. In general, we are interested in understanding for whom and for what conditions self- and partner-delivered therapeutic massage interventions are feasible and monitored for fidelity. We are also interested in understanding compliance to self- and partner delivered massage interventions as well as how participants are trained and the extent to which trainings and interventions can be replicated and implemented into other settings. To answer these questions, our scoping and systematic review has three main objectives: 1. Review and assess existing knowledge regarding therapeutic effects and health related outcomes for self- and partner-delivered massage across populations and conditions. 2. Review and assess self- and partner-delivered massage training approaches, fidelity monitoring, and identified barriers to and successful strategies for training self- and partner-delivered massage interventions across populations and conditions. 3. Review and assess compliance to self- and partner-delivered massage interventions across populations and conditions in existing research.
Self-dual supersymmetric nonlinear sigma models
Creators: name: Kuzenko, S. M.
name: McArthur, I. N.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: In four-dimensional N=1 Minkowski superspace, general nonlinear sigma models with four-dimensional target spaces may be realised in term of CCL (chiral and complex linear) dynamical variables which consist of a chiral scalar, a complex linear scalar and their conjugate superfields. Here we introduce CCL sigma models that are invariant under U(1) "duality rotations" exchanging the dynamical variables and their equations of motion. The Lagrangians of such sigma models prove to obey a partial differential equation that is analogous to the self-duality equation obeyed by U(1) duality invariant models for nonlinear electrodynamics. These sigma models are self-dual under a Legendre transformation that simultaneously dualises (i) the chiral multiplet into a complex linear one; and (ii) the complex linear multiplet into a chiral one. Any CCL sigma model possesses a dual formulation given in terms of two chiral multiplets. The U(1) duality invariance of the CCL sigma model proves to be equivalent, in the dual chiral formulation, to a manifest U(1) invariance rotating the two chiral scalars. Since the target space has a holomorphic Killing vector, the sigma model possesses a third formulation realised in terms of a chiral multiplet and a tensor multiplet. The family of U(1) duality invariant CCL sigma models includes a subset of N=2 supersymmetric theories. Their target spaces are hyper Kahler manifolds with a non-zero Killing vector field. In the case that the Killing vector field is triholomorphic, the sigma model admits a dual formulation in terms of a self-interacting off-shell N=2 tensor multiplet. We also identify a subset of CCL sigma models which are in a one-to-one correspondence with the U(1) duality invariant models for nonlinear electrodynamics. The target space isometry group for these sigma models contains a subgroup U(1) x U(1).
description: 22 pages; V2: typos corrected
Deformations of the discrete Heisenberg group
Creators: name: Barmeier, Severin
Publisher: name: arXiv
Year: 2013
Subjects: subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 32G08, 22E40, 22F30, 57S30

description: We study deformations of the discrete Heisenberg group acting properly discontinuously on the Heisenberg group from the left and right and obtain a complete description of the deformation space.
description: 8 pages
An Investigation of Euroamerican Ceramic Use in the Catawba Nation, 1760-1820
Creators: name: LaMack, Christopher
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2019

description: This thesis addresses an undeveloped aspect of Catawba lifeways and material culture during the late eighteenth and early nineteenth centuries: the presence of increasingly large quantities of Euroamerican ceramics on archaeological contexts associated with Catawba occupation. Although the Catawba, a coalescent nation driven into existence by the direct and indirect pressures of European contact, have long been players in colonial markets, evidence for Euroamerican ceramics in particular seems to explode from Late Colonial and Federal period contexts. Why, at the same time that Catawba ceramic production reached its peak, did the Catawba consumption of Euroamerican materials also increase so dramatically? What were the mechanisms by which Euroamerican vessels were acquired and integrated into Catawba life? And how did such objects feature in rapidly changing relationships and modes of interaction between the Catawba and their Euro-American neighbors? This thesis will attempt to address these compelling questions through the detailed analysis of the non-Catawba-made ceramic assemblages of three late eighteenth and early nineteenth century sites — Old Town, Ayers Town, and New Town.
Modeling Graphs with Vertex Replacement Grammars
Creators: name: Sikdar, Satyaki
name: Hibshman, Justus
name: Weninger, Tim
Publisher: name: arXiv
Year: 2019
Subjects: subject: Social and Information Networks (cs.SI)
subject: Formal Languages and Automata Theory (cs.FL)
subject: FOS: Computer and information sciences

description: One of the principal goals of graph modeling is to capture the building blocks of network data in order to study various physical and natural phenomena. Recent work at the intersection of formal language theory and graph theory has explored the use of graph grammars for graph modeling. However, existing graph grammar formalisms, like Hyperedge Replacement Grammars, can only operate on small tree-like graphs. The present work relaxes this restriction by revising a different graph grammar formalism called Vertex Replacement Grammars (VRGs). We show that a variant of the VRG called Clustering-based Node Replacement Grammar (CNRG) can be efficiently extracted from many hierarchical clusterings of a graph. We show that CNRGs encode a succinct model of the graph, yet faithfully preserves the structure of the original graph. In experiments on large real-world datasets, we show that graphs generated from the CNRG model exhibit a diverse range of properties that are similar to those found in the original networks.
description: Accepted as a regular paper at IEEE ICDM 2019. 15 pages, 9 figures
Decay estimates for four dimensional Schrödinger, Klein-Gordon and wave equations with obstructions at zero energy
Creators: name: Green, William R.
name: Toprak, Ebru
Publisher: name: arXiv
Year: 2015
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: We investigate dispersive estimates for the Schrödinger operator $H=-Δ+V$ with $V$ is a real-valued decaying potential when there are zero energy resonances and eigenvalues in four spatial dimensions. If there is a zero energy obstruction, we establish the low-energy expansion $$ e^{itH}χ(H) P_{ac}(H)=O(1/(\log t)) A_0+ O(1/t)A_1+O((t\log t)^{-1})A_2+ O(t^{-1}(\log t)^{-2})A_3. $$ Here $A_0,A_1:L^1(\mathbb R^n)\to L^\infty (\mathbb R^n)$, while $A_2,A_3$ are operators between logarithmically weighted spaces, with $A_0,A_1,A_2$ finite rank operators, further the operators are independent of time. We show that similar expansions are valid for the solution operators to Klein-Gordon and wave equations. Finally, we show that under certain orthogonality conditions, if there is a zero energy eigenvalue one can recover the $|t|^{-2}$ bound as an operator from $L^1\to L^\infty$. Hence, recovering the same dispersive bound as the free evolution in spite of the zero energy eigenvalue.
description: Updated references. To appear in Differential and Integral Equations
Some results on vanishing coefficients in infinite product expansions
Creators: name: Baruah, Nayandeep Deka
name: Kaur, Mandeep
Publisher: name: arXiv
Year: 2019
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: Primary 33D15, Secondary 11F33

description: Recently, M. D. Hirschhorn proved that, if $\sum_{n=0}^\infty a_nq^n := (-q,-q^4;q^5)_\infty(q,q^9;q^{10})_\infty^3$ and $\sum_{n=0}^\infty b_nq^n:=(-q^2,-q^3;q^5)_\infty(q^3,q^7;q^{10})_\infty^3$, then $a_{5n+2}=a_{5n+4}=0$ and $b_{5n+1}=b_{5n+4}=0$. Motivated by the work of Hirschhorn, D. Tang proved some comparable results including the following: If $ \sum_{n=0}^\infty c_nq^n := (-q,-q^4;q^5)_\infty^3(q^3,q^7;q^{10})_\infty$ and $\sum_{n=0}^\infty d_nq^n := (-q^2,-q^3;q^5)_\infty^3(q,q^9;q^{10})_\infty$, then $c_{5n+3}=c_{5n+4}=0$ and $d_{5n+3}=d_{5n+4}=0$. In this paper, we prove that $a_{5n}=b_{5n+2}$, $a_{5n+1}=b_{5n+3}$, $a_{5n+2}=b_{5n+4}$, $a_{5n-1}=b_{5n+1}$, $c_{5n+3}=d_{5n+3}$, $c_{5n+4}=d_{5n+4}$, $c_{5n}=d_{5n}$, $c_{5n+2}=d_{5n+2}$, and $c_{5n+1}>d_{5n+1}$. We also record some other comparable results not listed by Tang.
description: 15 pages
Generating Functions and Congruences for Some Partition Functions Related to Mock Theta Functions
Creators: name: Baruah, Nayandeep Deka
name: Begum, Nilufar Mana
Publisher: name: arXiv
Year: 2019
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11P83 (Primary), 05A15, 05A17 (Secondary)

description: Recently, Andrews, Dixit and Yee introduced partition functions associated with Ramanujan/Watson third order mock theta functions $ω(q)$ and $ν(q)$. In this paper, we find several new exact generating functions for those partition functions as well as the associated smallest parts functions and deduce several new congruences modulo powers of 5.
description: 23 pages
Land use affects coastal stream phytoplankton nutrient and light limitation
Creators: name: Couper, Lisa
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2014

description: Human land use alterations in the watersheds of coastal streams flowing into the New River Estuary (NRE) have resulted in changes in nutrient concentrations, irradiance, and light attenuation of receiving systems. Two watersheds draining into the NRE were selected for comparison given their contrasting land use characteristics. Significant differences in NH_4^+, and NO_x^- were found between sites during previous in situ monitoring, and differences in light attenuation and surface irradiance were found during this study. In order to understand the mechanisms influencing native phytoplankton abundance in these coastal streams, nutrient and light addition bioassays were conducted for each site at base and storm flow, and further light level manipulations were conducted using site as an additional factor given the difference in optical water properties. In the nutrient and light bioassays, it was found that N additions stimulated increased phytoplankton abundance; N additions and light have an interactive effect on abundance; and P additions and light additions alone had no effect at either site. In light level manipulation bioassays, the difference in phytoplankton response was much greater between different light treatments for a given site than between the two sites at a given light level. This result implies that canopy has a relatively greater effect than inherent optical water properties in governing light availability as indicated by phytoplankton abundance.  Results of light-level manipulation bioassays and P-I curves indicate that phytoplankton have a lower photosynthetic efficiency and maximum rate when disruptions to their light regime occur, and phytoplankton adapted to greater light environments have decreased susceptibility to photoinhibition.
Microscopic Model building for Black Hole Membranes from Constraints of Symmetry
Creators: name: Bhattacharya, Swastik
name: Shankaranarayanan, S.
Publisher: name: arXiv
Year: 2019
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Einstein equations projected on black-hole horizons give rise to the equations of motion of a viscous fluid. This suggests a way to understand the microscopic degrees of freedom on the black-hole horizon by focusing on the physics of this fluid. In this talk, we shall approach this problem by building a crude microscopic model for the Horizon-fluid(HF) corresponding to asymptotically flat black-holes in 3+1 dimensions. The symmetry requirement for our model is that it should incorporate the S1 diffeo-symmetry on the black-hole horizon. The second constraint comes from the demand that the correct value of the Coefficient of the Bulk Viscosity of the HF can be deduced from the model. Both these requirements can be satisfied by an adoption of the eight vertex Baxter model on a S2 surface. We show that the adiabatic entropy quantisation proposed by Bekenstein also follows from this model. Finally, we argue the results obtained so far suggest that a perturbed black-hole can be described by a CFT perturbed by relevant operators and discuss the physical implications.
description: 16 Pages, 2 Figures; MG16 Proceedings
4-Generated Pseudo Symmetric Monomial Curves with not Cohen-Macaulay Tangent Cones
Creators: name: Şahin, Nil
Publisher: name: arXiv
Year: 2019
Subjects: subject: Commutative Algebra (math.AC)
subject: FOS: Mathematics

description: In this article, standard bases of some toric ideals associated to 4-generated pseudo symmetric semigroups with not Cohen-Macaulay tangent cones at the origin are computed. As the tangent cones are not Cohen-Macaulay, non-decreasingness of the Hilbert function of the local ring was not guaranteed. Therefore, using these standard bases, Hilbert functions are explicitly computed as a step towards the characterization of Hilbert function. In addition, when the smallest integer satisfying $k(α_2+1)<(k-1)α_1+(k+1)α_{21}+α_3$ is $1$, it is proved that the Hilbert function of the local ring is non-decreasing.
Deconfined Quantum Criticality, Scaling Violations, and Classical Loop Models
Creators: name: Nahum, Adam
name: Chalker, J. T.
name: Serna, P.
name: Ortuño, M.
name: Somoza, A. M.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Numerical studies of the Néel to valence-bond solid phase transition in 2D quantum antiferromagnets give strong evidence for the remarkable scenario of deconfined criticality, but display strong violations of finite-size scaling that are not yet understood. We show how to realise the universal physics of the Neel-VBS transition in a 3D classical loop model (this includes the interference effect that suppresses Néel hedgehogs). We use this model to simulate unprecedentedly large systems (of size $L\leq 512$). Our results are compatible with a direct continuous transition at which both order parameters are critical, and we do not see conventional signs of first-order behaviour. However, we find that the scaling violations are stronger than previously realised and are incompatible with conventional finite-size scaling over the size range studied, even if allowance is made for a weakly/marginally irrelevant scaling variable. In particular, different determinations of the anomalous dimensions $η_\text{VBS}$ and $η_\text{Néel}$ yield very different results. The assumption of conventional finite-size scaling gives estimates which drift to negative values at large $L$, in violation of unitarity bounds. In contrast, the behaviour of correlators on scales much smaller than $L$ is consistent with large positive anomalous dimensions. Barring an unexpected reversal in behaviour at still larger sizes, this implies that the transition, if continuous, must show unconventional finite-size scaling, e.g. from a dangerously irrelevant scaling variable. Another possibility is an anomalously weak first-order transition. By analysing the renormalisation group flows for the non-compact $CP^{n-1}$ model ($n$-component Abelian Higgs model) between two and four dimensions, we give the simplest scenario by which an anomalously weak first-order transition can arise without fine-tuning of the Hamiltonian.
description: 20 pages, 19 figures
Sharing research data and materials
Creators: name: Klapwijk, Eduard
Publisher: name: Zenodo
Year: 2023
Subjects: research data management
open data
open materials
FAIR principles
data access
exercise

description: Presentation for a workshop about the options of sharing research materials and research data for different research projects. The presentation focuses on the opportunities of sharing materials other than research data, so that you can demonstrate the power of your inquiry and that other researchers can re-use your data and materials. After an introductory talk, the room is divided into groups to work together on different use cases that will help bringing the lecture learnings into practice. After completion of this workshop, you will be able to: explain the importance of documenting your data and research process; explain the importance of sharing materials and (parts of the) data; identify different levels of data processing and levels of data access for data and materials; and find available resources and support for research data management. This event is a part of the Open and Responsible Science Campaign at Erasmus University Rotterdam.
Evaluating how time factors influence fraud：An online conceptual replication of Shalvi, Eldar, and Bereby-Meyer (2012).
Creators: name: Liu, Huanxu
name: Yamada, Yuki
Publisher: name: Open Science Framework
Year: 2022
Subjects: subject: Social and Behavioral Sciences

description: This is an additional analysis of the time pressure pre-registration study (osf.io/aqn5r).
Unsupervised Learning via Mixtures of Skewed Distributions with Hypercube Contours
Creators: name: Franczak, Brian C.
name: Tortora, Cristina
name: Browne, Ryan P.
name: McNicholas, Paul D.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Methodology (stat.ME)
subject: FOS: Computer and information sciences

description: Mixture models whose components have skewed hypercube contours are developed via a generalization of the multivariate shifted asymmetric Laplace density. Specifically, we develop mixtures of multiple scaled shifted asymmetric Laplace distributions. The component densities have two unique features: they include a multivariate weight function, and the marginal distributions are also asymmetric Laplace. We use these mixtures of multiple scaled shifted asymmetric Laplace distributions for clustering applications, but they could equally well be used in the supervised or semi-supervised paradigms. The expectation-maximization algorithm is used for parameter estimation and the Bayesian information criterion is used for model selection. Simulated and real data sets are used to illustrate the approach and, in some cases, to visualize the skewed hypercube structure of the components.
Differential forms, Fukaya $A_\infty$ algebras, and Gromov-Witten axioms
Creators: name: Solomon, Jake P.
name: Tukachinsky, Sara B.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Symplectic Geometry (math.SG)
subject: High Energy Physics - Theory (hep-th)
subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 53D37, 53D45 (Primary) 58A10, 53D12, 32Q65 (Secondary)

description: Consider the differential forms $A^*(L)$ on a Lagrangian submanifold $L \subset X$. Following ideas of Fukaya-Oh-Ohta-Ono, we construct a family of cyclic unital curved $A_\infty$ structures on $A^*(L),$ parameterized by the cohomology of $X$ relative to $L.$ The family of $A_\infty$ structures satisfies properties analogous to the axioms of Gromov-Witten theory. Our construction is canonical up to $A_\infty$ pseudoisotopy. We work in the situation that moduli spaces are regular and boundary evaluation maps are submersions, and thus we do not use the theory of the virtual fundamental class.
description: 51 pages, 6 figures; corrected minor errors, updated references
Racial disparities in municipal water and sewer access in western North Carolina
Creators: name: Gorelick, David
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2015

description: In the 21st Century, there is still observable racial division in communities of the southern United States. In North Carolina, though institutional discrimination has long been outlawed, residual segregation in housing patterns persists. Descendants of freed slaves now live in extra-territorial jurisdictions (ETJs) of the small, southern towns their ancestors settled outside of, which are subject to the adjacent municipality’s zoning and land-use statutes but have no political representation. Communities within an ETJ are not guaranteed municipal water or sewer service by a municipality; if not annexed, these areas must rely on wells and septic systems as an alternative. Should septic systems fail and zoning or land use ordinances prevent timely or affordable replacement, local groundwater contamination would pose a threat to public health. To investigate the role of race in access of municipal services by ETJ populations in Burke and Catawba Counties of NC, we apply logistic regression to tax parcel utility and Census demographic and socioeconomic data aggregated using a geographic information systems (GIS) approach. Comparison of regressions at each county and utility pairing revealed complex relationships between census block black population percentage, socioeconomic indicators parcel value and block group median household income, and ETJ block residential housing density. Regression trends agreed at low and median housing density scenarios in both counties but disagree at high housing density in Burke County. Race could play a role in municipal water and sewer service access in Burke and Catawba County ETJs, but the magnitude and direction of impact greatly varies between socioeconomic and housing density scenarios. Specific analysis of the historical urban planning and zoning designations of areas of interest within these ETJs would be more illuminating in determining whether or not these communities still feel the influence of race-based segregation. Future work involving Hispanic or non-white populations, as well as using well or septic utility services as proxies for lack of municipal service, would be of great interest in NC and the South overall.
On mixing and sparse ergodic theorems
Creators: name: Katz, Asaf
Publisher: name: arXiv
Year: 2016
Subjects: subject: Dynamical Systems (math.DS)
subject: Number Theory (math.NT)
subject: FOS: Mathematics

description: We consider Bourgain's ergodic theorem regarding arithmetic averages in the cases where quantitative mixing is present in the dynamical system. Focusing on the case of the horocyclic flow, those estimates allows us to bound from above the Hausdorff dimension of the exceptional set, providing evidence towards conjectures by Margulis,Shah and Sarnak regarding equidistribution of arithmetic averages in homogeneous spaces. We also prove the existence of a uniform upper bound for the Hausdorff dimension of the exceptional set which is independent from the spectral gap.
description: Updated version, to appear in Journal of Modern Dynamics
Dipole Subtraction vs. Phase Space Slicing in NLO NRQCD Heavy-Quarkonium Production Calculations
Creators: name: Butenschoen, Mathias
name: Kniehl, Bernd A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We compare two approaches to evaluate cross sections of heavy-quarkonium production at next-to-leading order in nonrelativistic QCD involving $S$- and $P$-wave Fock states: the customary approach based on phase space slicing and the approach based on dipole subtraction recently elaborated by us. We find reasonable agreement between the numerical results of the two implementations, but the dipole subtraction implementation outperforms the phase space slicing one both with regard to accuracy and speed.
description: 24 pages, 1 figure, 6 tables, matches journal version
Single rare-earth ions as atomic-scale probes in ultra-scaled transistors
Creators: name: Zhang, Qi
name: Hu, Guangchong
name: de Boo, Gabriele G.
name: Rancic, Milos
name: Johnson, Brett C.
name: McCallum, Jeffrey C.
name: Du, Jiangfeng
name: Sellars, Matthew J.
name: Yin, Chunming
name: Rogge, Sven
Publisher: name: arXiv
Year: 2018
Subjects: subject: Applied Physics (physics.app-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Continued dimensional scaling of semiconductor devices has driven information technology into vastly diverse applications. As the size of devices approaches fundamental limits, metrology techniques with nanometre resolution and three-dimensional (3D) capabilities are desired for device optimisation. For example, the performance of an ultra-scaled transistor can be strongly influenced by the local electric field and strain. Here we study the spectral response of single erbium ions to applied electric field and strain in a silicon ultra-scaled transistor. Stark shifts induced by both the overall electric field and the local charge environment are observed. Further, changes in strain smaller than $3\times 10^{-6}$ are detected, which is around two orders of magnitude more sensitive than the standard techniques used in the semiconductor industry. These results open new possibilities for non-destructive 3D mapping of the local strain and electric field in the channel of ultra-scaled transistors, using the single erbium ions as ultra-sensitive atomic probes.
description: 10+5 pages, 4+3 figures
Recognition of cooking actions in video data
Creators: name: Wei, Mingyue
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2019

description: This project focuses on using Machine Learning methods to recognize actions from cooking video sequences. The cooking videos and annotations are from MPII Cooking Activities Dataset, and a subset was constructed by selecting a group of the most frequently appearing actions, and generating matching video clips. Optical flows of those 11 actions’ videos were computed and were passed into a pre-trained Deep Learning Two-Stream Inflated 3D ConvNet to generate features of dimension 1024. Support Vector Machine classifiers and Random Forest classifiers were then applied to recognize and classify these actions using the extracted features. Binary SVM had the worst performance among the three classifiers we tested, whether considering imbalance in data or not. Multi-class SVM classifier and Random Forest classifier had similar results in precision of classification.
Duality for increasing convex functionals with countably many marginal constraints
Creators: name: Bartl, Daniel
name: Cheridito, Patrick
name: Kupper, Michael
name: Tangpi, Ludovic
Publisher: name: arXiv
Year: 2015
Subjects: subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: Primary 47H07, Secondary 46G12, 91G20

description: In this work we derive a convex dual representation for increasing convex functionals on a space of real-valued Borel measurable functions defined on a countable product of metric spaces. Our main assumption is that the functionals fulfill marginal constraints satisfying a certain tightness condition. In the special case where the marginal constraints are given by expectations or maxima of expectations, we obtain linear and sublinear versions of Kantorovich's transport duality and the recently discovered martingale transport duality on products of countably many metric spaces.
Nonlinear Spatial Focusing in Random Layered Media by Spectral Pulse Shaping
Creators: name: Han, Alex C.
name: Milner, Valery
Publisher: name: arXiv
Year: 2015
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We demonstrate numerically a method of focusing two-photon field inside one-dimensional random media. The approach is based on coherent control of backscattering achieved by adaptive spectral pulse shaping. The spectral phases of a femtosecond laser pulse are adjusted for the constructive interference of its backward-traveling components, resulting in an enhanced reflection from within the random system. A delayed forward-propagating second pulse overlaps with the controlled reflection, increasing the inter-pulse multi-photon field at a location determined by the delay between the two pulses. The technique is shown to be robust against the variations of the disorder, and to work with realistic pulse shaping parameters, hence enabling applications in controlling random lasing and multi-photon imaging in scattering materials.
description: 7 pages, 7 figures
Banach Poisson-Lie groups and Bruhat-Poisson structure of the restricted Grassmannian
Creators: name: Tumpach, Alice Barbara
Publisher: name: arXiv
Year: 2018
Subjects: subject: Mathematical Physics (math-ph)
subject: Functional Analysis (math.FA)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: The first part of this paper is devoted to the theory of Poisson-Lie groups in the Banach setting. Our starting point is the straightforward adaptation of the notion of Manin triples to the Banach context. The difference with the finite-dimensional case lies in the fact that a duality pairing between two non-reflexive Banach spaces is necessary weak (as opposed to a strong pairing where one Banach space can be identified with the dual space of the other). The notion of generalized Banach Poisson manifolds introduced in this paper is compatible with weak duality pairings between the tangent space and a subspace of the dual. We investigate related notion like Banach Lie bialgebras and Banach Poisson-Lie groups, suitably generalized to the non-reflexive Banach context. The second part of the paper is devoted to the treatment of particular examples of Banach Poisson-Lie groups related to the restricted Grassmannian and the KdV hierarchy. More precisely, we construct a Banach Poisson-Lie group structure on the unitary restricted Banach Lie group which acts transitively on the restricted Grassmannian. A "dual" Banach Lie group consisting of (a class of) upper triangular bounded operators admits also a Banach Poisson-Lie group structure of the same kind. We show that the restricted Grassmannian inherits a generalized Banach Poisson structure from the unitary Banach Lie group, called Bruhat-Poisson structure. Moreover the action of the triangular Banach Poisson-Lie group on it is a Poisson map. This action generates the KdV hierarchy, and its orbits are the Schubert cells of the restricted Grassmannian.
Making waves with ultrasound training for nonclinical anatomy educators
Creators: name: Fickert, Lane
name: Heise, Natascha
name: Toreno, Felicia
name: Dickinson, Suzanne
name: Delicia Peeples
name: Pas, Ashton
name: Feyzeau, Kean
Publisher: name: F1000 Research Limited
Year: 2023

description: Background
 Ultrasound (US) continues to influence modern medicine as a powerful screening and diagnostic imaging modality. Its noninvasive approach and efficiency apply to a wide range of specialties and play an important role in medical and health professions education. As an evolving thread at institutions incorporating US, a team of clinicians, anatomy faculty, near-peer students, and sonographers facilitate instruction and training sessions. Several national medical organizations provide formal credentialing, certification, and continuing education for diagnostic medical sonographers and clinical practitioners. However, formalized training for nonclinical anatomy faculty is limited and varies greatly. At Eastern Virginia Medical School (EVMS), the US Department bridged the gap by providing anatomy faculty with the knowledge and skills to contribute to US education and integration.

 Summary of Work
 At EVMS, US education is incorporated across the medical and health professions curriculum, emphasizing acquiring and interpreting an Extended Focused Assessment with Sonography in Trauma (eFAST) exam, recognized as a standard diagnostic protocol in emergency and critical care. To collaborate with the US education team and strengthen US knowledge, anatomy faculty attended case-based lectures, completed associated Sonosim® modules, and participated in US faculty lead and self-directed scanning sessions following the EVMS US learning objectives. The anatomy faculty compiled a portfolio of the images captured during each self-directed session for US faculty feedback.

 Summary of Results
 Through this effort, anatomy faculty gained the necessary US knowledge and skills to assist in teaching medical and health professions students during their didactic years. Combining existing knowledge of the anatomical sciences with this imaging modality enabled anatomy faculty to integrate content across courses emphasizing structure, function, variation, and pathologies. Anatomy faculty reported that feedback from the US faculty was essential to their understanding of US and competence in image acquisition and interpretation.

 Discussion & Conclusion
 US training is expanding across medical and health professions education and bridges basic science to clinical practice. Since the demand for anatomy faculty continuously rises to best prepare modern healthcare professionals, US training for nonclinical faculty may advantageously assist in this endeavor.

 Take Home Messages
 Formalized US training for nonclinical anatomy educators may bridge the gap between US and the anatomical sciences to advance medical and health professions education.