cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
A p-multigrid method enhanced with an ILUT smoother and its comparison to h-multigrid methods within Isogeometric Analysis
Creators: name: Tielen, R.
name: Möller, M.
name: Göddeke, D.
name: Vuik, C.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics

description: Over the years, Isogeometric Analysis has shown to be a successful alternative to the Finite Element Method (FEM). However, solving the resulting linear systems of equations efficiently remains a challenging task. In this paper, we consider a p-multigrid method, in which coarsening is applied in the approximation order p instead of the mesh width h. Since the use of classical smoothers (e.g. Gauss-Seidel) results in a p-multigrid method with deteriorating performance for higher values of p, the use of an ILUT smoother is investigated. Numerical results and a spectral analysis indicate that the resulting p-multigrid method exhibits convergence rates independent of h and p. In particular, we compare both coarsening strategies (e.g. coarsening in h or p) adopting both smoothers for a variety of two and threedimensional benchmarks.
Type Ia Supernova Explosions from Hybrid Carbon-Oxygen-Neon White Dwarf Progenitors
Creators: name: Willcox, Donald E.
name: Townsley, Dean M.
name: Calder, Alan C.
name: Denissenkov, Pavel A.
name: Herwig, Falk
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Motivated by recent results in stellar evolution that predict the existence of hybrid white dwarf (WD) stars with a C-O core inside an O-Ne shell, we simulate thermonuclear (Type Ia) supernovae from these hybrid progenitors. We use the FLASH code to perform multidimensional simulations in the deflagration to detonation transition (DDT) explosion paradigm. Our hybrid progenitor models were produced with the MESA stellar evolution code and include the effects of the Urca process, and we map the progenitor model to the FLASH grid. We performed a suite of DDT simulations over a range of ignition conditions consistent with the progenitor's thermal and convective structure assuming multiple ignition points. To compare the results from these hybrid WD stars to previous results from C-O white dwarfs, we construct a set of C-O WD models with similar properties and similarly simulate a suite of explosions. We find that despite significant variability within each suite, trends distinguishing the explosions are apparent in their $^{56}$Ni yields and the kinetic properties of the ejecta. We comment on the feasibility of these explosions as the source of some classes of observed subluminous events.
description: 14 pages, 19 figures, submitted to the Astrophysical Journal
Masur-Veech volumes and intersection theory on moduli spaces of abelian differentials
Creators: name: Chen, Dawei
name: Möller, Martin
name: Sauvaget, Adrien
name: Zagier, Don
Publisher: name: arXiv
Year: 2019
Subjects: subject: Algebraic Geometry (math.AG)
subject: Geometric Topology (math.GT)
subject: Number Theory (math.NT)
subject: FOS: Mathematics

description: We show that the Masur-Veech volumes and area Siegel-Veech constants can be obtained by intersection numbers on the strata of Abelian differentials with prescribed orders of zeros. As applications, we evaluate their large genus limits and compute the saddle connection Siegel-Veech constants for all strata. We also show that the same results hold for the spin and hyper-elliptic components of the strata.
description: 67 pages, 3 figures
FIDUCEO project: (Microwave): Report on the MW FCDR: Uncertainty
Creators: name: Burgdorf, Martin
name: Hans, Imke
name: Mittaz, Jon
name: Wooliams, Emma
Publisher: name: Zenodo
Year: 2019
Subjects: subject: https://id.loc.gov/authorities/subjects/sh85040468.html
subject: https://id.loc.gov/authorities/subjects/sh85084334.html
subject: https://id.loc.gov/authorities/subjects/sh85101653.html

description: This document is one of the five documents that make up the D2-2 report on "traceability chains for FCDRs". Since the original project proposal our thoughts have refined and while this document describes the "sequence of measurement standards and calibrations that is used to relate a measurement result to a reference" (the VIM definition of a traceability chain), it is not presenting this in the form of a chain. This document provides an overview of the uncertainty analysis for the analysed sensors along with the methods to establish metrological traceability for the developed FCDRs. This document is specifically about the MicrowaveFCDR (MHS, SSM-T2, AMSU-B). The document D2-2a provides an overview of the purposes of these documents and explains the basis of the effects tables.
description: Previously curated at: http://cedadocs.ceda.ac.uk/1402/ Main files in this record: D2_2 Report on the Microwave FCDR uncertainty.pdf Item originally deposited with Centre for Environmental Data Analysis (CEDA) document repository by Miss Esther Conway. Transferred to CEDA document repository community on Zenodo on 2022-11-24
State-conditional coherent charge qubit oscillations in a Si/SiGe quadruple quantum dot
Creators: name: Ward, D. R.
name: Kim, Dohun
name: Savage, D. E.
name: Lagally, M. G.
name: Foote, R. H.
name: Friesen, Mark
name: Coppersmith, S. N.
name: Eriksson, Mark A.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Universal quantum computation requires high fidelity single qubit rotations and controlled two qubit gates. Along with high fidelity single qubit gates, strong efforts have been made in developing robust two qubit logic gates in electrically-gated quantum dot systems to realize a compact and nano-fabrication-compatible architecture. Here, we perform measurements of state-conditional coherent oscillations of a charge qubit. Using a quadruple quantum dot formed in a Si/SiGe heterostructure, we show the first demonstration of coherent two-axis control of a double quantum dot charge qubit in undoped Si/SiGe, performing Larmor and Ramsey oscillation measurements. We extract the strength of the capacitive coupling between double quantum dots by measuring the detuning energy shift ($\approx$ 75 $μ$eV) of one double dot depending on the excess charge configuration of the other double dot. We further demonstrate that the strong capacitive coupling allows fast conditional Landau-Zener-Stuckelberg interferences with conditonal $π$ phase flip time about 80 ps, showing promising pathways toward multi-qubit entanglement control in semiconductor quantum dots.
description: 9 pages, 8 figures including supplementary information
Code and Data for the study - Differential effects of climate change on average and peak demand for heating and cooling across the contiguous United States
Creators: name: Yash Amonkar
Publisher: name: Zenodo
Year: 2023

description: This is the code and data for the study title - Differential effects of climate change on average and peak demand for heating and cooling across the contiguous United States. Refer the GitHub repo for additional information https://github.com/yashamonkar/CONUS-Inferred-Heating-Cooling
Mutual Context Network for Jointly Estimating Egocentric Gaze and Actions
Creators: name: Huang, Yifei
name: Li, Zhenqiang
name: Cai, Minjie
name: Sato, Yoichi
Publisher: name: arXiv
Year: 2019
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: In this work, we address two coupled tasks of gaze prediction and action recognition in egocentric videos by exploring their mutual context. Our assumption is that in the procedure of performing a manipulation task, what a person is doing determines where the person is looking at, and the gaze point reveals gaze and non-gaze regions which contain important and complementary information about the undergoing action. We propose a novel mutual context network (MCN) that jointly learns action-dependent gaze prediction and gaze-guided action recognition in an end-to-end manner. Experiments on public egocentric video datasets demonstrate that our MCN achieves state-of-the-art performance of both gaze prediction and action recognition.
Modelling Space-time Periodic Structures with Arbitrary Unit Cells Using Time Periodic Circuit Theory
Creators: name: Elnaggar, Sameh Y.
name: Milford, Gregory N.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: Using the time periodic ABCD parameters, an expression for the dispersion relation of space-time modulated structures is obtained. The relation is valid for general structures even when the spatial granularity is comparable to the operating and modulation wavelengths. In the limit of infinitesimal unit cell, the dispersion relation reduces identically to its continuous counterpart. For homogeneous space-time modulated media, the time periodic circuit approach allows the extension of the well-known telegraphist's equations. The time harmonics are coupled together to form an infinite system of coupled differential equations. At the scattering centres, where the interaction is mediated via the modulation (pump wave), the telegraphist's equations reduce to the interaction of two waves only: the signal and idler. The interaction can then be described using three wave mixing, satisfying the phase matching condition. It is demonstrated that the time periodic S parameters provide an alternative and appealing visualization of the modal conversion and the emergence of non-reciprocity inside the bandgaps.
description: 9 pages, 10 figures
FIDUCEO Project: (MVIRI): Report on the MVIRIFCDR: Uncertainty
Creators: name: Rüthrich, Frank
name: Wooliams, Emma
name: Govaerts, Yves
name: Quast, Ralf
name: Mittaz, Jon
Publisher: name: Zenodo
Year: 2017
Subjects: subject: https://id.loc.gov/authorities/subjects/sh85040468.html
subject: https://id.loc.gov/authorities/subjects/sh85084334.html
subject: https://id.loc.gov/authorities/subjects/sh85101653.html

description: This document is one of the five documents that make up the D2-2 report on "traceability chains for FCDRs". Since the original project proposal our thoughts have refined and while this document describes the "sequence of measurement standards and calibrations that is used to relate a measurement result to a reference" (the VIM definition of a traceability chain), it is not presenting this in the form of a chain. This document provides an overview of the uncertainty analysis for the analysed sensors along with the methods to establish metrological traceability for the developed FCDRs. This document is specifically about the MVIRIFCDR. The document D2-2a provides an overview of the effects tables.
description: Previously curated at: http://cedadocs.ceda.ac.uk/1403/ Main files in this record: D2-2 Report on MVIRI FCDR uncertainty.pdf Item originally deposited with Centre for Environmental Data Analysis (CEDA) document repository by Miss Esther Conway. Transferred to CEDA document repository community on Zenodo on 2022-11-24
Kelvin--Helmholtz instability in an active region jet observed with Hinode
Creators: name: Zhelyazkov, I.
name: Chandra, R.
name: Srivastava, A. K.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Over past ten years a variety of jet-like phenomena were detected in the solar atmosphere, including plasma ejections over a range of coronal temperatures being observed as extreme ultraviolet (EUV) and X-ray jets. We study the possibility for the development of Kelvin--Helmholtz (KH) instability of transverse magnetohydrodynamic (MHD) waves traveling along an EUV jet situated on the west side of NOAA AR 10938 and observed by three instruments on board Hinode on 2007 January 15/16 (Chifor et al., Astron. Astrophys.481, L57 (2008)). The jet was observed around LogT_e = 6.2 with up-flow velocities exceeded 150 km/s. Using Fe XII lambda186 and lambda195 line ratios, the measured densities were found to be above LogN_e = 11. We have modeled that EUV jet as a vertically moving magnetic flux tube (untwisted and weakly twisted) and have studied the propagation characteristics of the kink (m = 1) mode and the higher m modes with azimuthal mode numbers m = 2, 3, 4. It turns out that all these MHD waves can become unstable at flow velocities in the range of 112--114.8 km/s. The lowest critical jet velocity of 112 km/s is obtained when modeling the jet as compressible plasma contained in an untwisted magnetic flux tube. We have compared two analytically found criteria for predicting the threshold Alfven Mach number for the onset of KH instability and have concluded that one of them yields reliable values for the critical Alfven Mach number. Our study of the nature of stable and unstable MHD modes propagating on the jet shows that in a stable regime all the modes are pure surface waves, while the unstable kink (m = 1) mode in untwisted compressible plasma flux tube becomes a leaky wave. In the limit of incompressible media (for the jet and its environment) all unstable modes are non-leaky surface waves.
description: 16 pages, 8 figures, 1 table, Astrophys. Space Sci. -- accepted
FIDUCEO project (HIRS): Report on the HIRS FCDR: Uncertainty
Creators: name: Holl, Gerrit
name: Wooliams, Emma
name: Mittaz, Jon
Publisher: name: Zenodo
Year: 2019
Subjects: subject: https://id.loc.gov/authorities/subjects/sh85040468.html
subject: https://id.loc.gov/authorities/subjects/sh85084334.html
subject: https://id.loc.gov/authorities/subjects/sh85101653.html

description: This document is one of the five documents that make up the D2-2 report on "traceability chains for FCDRs". Since the original project proposal our thoughts have refined and while this document describes the "sequence of measurement standards and calibrations that is used to relate a measurement result to a reference" (the VIM definition of a traceability chain), it is not presenting this in the form of a chain. This document provides an overview of the uncertainty analysis for the analysed sensors along with the methods to establish metrological traceability for the developed FCDRs. This document is specifically about the HIRS FCDR. The document D2-2a provides an overview of the purposes of these documents and explains the basis of the effects tables.
description: Previously curated at: http://cedadocs.ceda.ac.uk/1404/ Main files in this record: D2-2 Report on HIRS FCDR uncertainty.pdf Item originally deposited with Centre for Environmental Data Analysis (CEDA) document repository by Miss Esther Conway. Transferred to CEDA document repository community on Zenodo on 2022-11-24
Evolved stars in the Local Group galaxies. I. AGB evolution and dust production in IC 1613
Creators: name: Dell'Agli, F.
name: Di Criscienzo, M.
name: Boyer, M. L.
name: Garcia-Hernandez, D. A.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We used models of thermally-pulsing asymptotic giant branch (AGB) stars, that also describe the dust-formation process in the wind, to interpret the combination of near- and mid-infrared photometric data of the dwarf galaxy IC 1613. This is the first time that this approach is extended to an environment different from the Milky Way and the Magellanic Clouds (MCs). Our analysis, based on synthetic population techniques, shows a nice agreement between the observations and the expected distribution of stars in the colour-magnitude diagrams obtained with JHK and Spitzer bands. This allows a characterization of the individual stars in the AGB sample in terms of mass, chemical composition, and formation epoch of the progenitors. We identify the stars exhibiting the largest degree of obscuration as carbon stars evolving through the final AGB phases, descending from 1-1.25Msun objects of metallicity Z=0.001 and from 1.5-2.5Msun stars with Z=0.002. Oxygen-rich stars constitute the majority of the sample (65%), mainly low mass stars (<2Msun) that produce a negligible amount of dust (<10^{-7}Msun/yr). We predict the overall dust-production rate from IC 1613, mostly determined by carbon stars, to be 6x10^{-7}Msun/yr with an uncertainty of 30%. The capability of the current generation of models to interpret the AGB population in an environment different from the MCs opens the possibility to extend this kind of analysis to other Local Group galaxies.
description: 14 pages, 6 figures, accepted for publication on MNRAS
Computational search for ultrasmall and fast skyrmions in the Inverse Heusler family
Creators: name: Xie, Yunkun
name: Ma, Jianhua
name: Vakilitaleghani, Hamed
name: Tan, Yaohua
name: Ghosh, Avik W.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Skyrmions are magnetic excitations that are potentially ultrasmall and topologically protected, making them interesting for high-density all-electronic ultrafast storage applications. While recent experiments have confirmed the existence of various types of skyrmions, their typical sizes are much larger than traditional domain walls, except at very low temperature. In this work, we explore the optimal material parameters for hosting ultra-small, fast, and room temperature stable skyrmions. As concrete examples, we explore potential candidates from the inverse Heusler family. Using first-principles calculations of structural and magnetic properties, we identify several promising ferrimagnetic inverse Heusler half-metal/near half-metals and analyze their phase space for size and metastability.
description: 7 pages, 3 figures, 1 table
Two confirmed class I very low-mass objects in Taurus
Creators: name: Dang-Duc, C.
name: Phan-Bao, N.
name: Dao-Van, D. T.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: [GKH94] 41 and IRAS 04191+1523B were previously identified to be proto-brown dwarf candidates in Taurus. [GKH94] 41 was classified to be a class I object. The dereddened spectral energy distribution of the source was later found to be suggestive of a class II object. IRAS 04191+1523B is a class I object that is the secondary component of a binary. We determine the evolutionary stage of [GKH94] 41 and estimate the final masses of the two proto-brown dwarf candidates. We used archive millimeter observations to produce continuum maps and collected data from the literature to construct the spectral energy distribution of the targets. Our continuum maps revealed that both [GKH94] 41 and IRAS 04191+1523B are surrounded by envelopes. This provides direct evidence that [GKH94] 41 is a class I object, not class II, as previously classified. For IRAS 04191+1523B, our continuum map spatially resolved the binary. Our estimated final masses are below 49$^{+56}_{-27}$ $M_{\rm J}$ and 75$^{+40}_{-26}$ $M_{\rm J}$ for [GKH94] 41 and IRAS 04191+1523B, respectively. This indicates that both sources will likely become brown dwarfs or very low-mass stars. Therefore, [GKH94] 41 and IRAS 04191+1523B are two new confirmed class I very low-mass objects. Their existence also supports the scenario that brown dwarfs have the same formation stages as low-mass stars.
description: 5 pages, 4 figures, accepted for publication in A&A Letters
Local limits of uniform triangulations in high genus
Creators: name: Budzinski, Thomas
name: Louf, Baptiste
Publisher: name: arXiv
Year: 2019
Subjects: subject: Probability (math.PR)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 60D05, 60C05, 05A16

description: We prove a conjecture of Benjamini and Curien stating that the local limits of uniform random triangulations whose genus is proportional to the number of faces are the Planar Stochastic Hyperbolic Triangulations (PSHT) defined in arXiv:1401.3297. The proof relies on a combinatorial argument and the Goulden--Jackson recurrence relation to obtain tightness, and probabilistic arguments showing the uniqueness of the limit. As a consequence, we obtain asymptotics up to subexponential factors on the number of triangulations when both the size and the genus go to infinity. As a part of our proof, we also obtain the following result of independent interest: if a random triangulation of the plane $T$ is weakly Markovian in the sense that the probability to observe a finite triangulation $t$ around the root only depends on the perimeter and volume of $t$, then $T$ is a mixture of PSHT.
description: 38 pages, 10 figures. V2: Correction of the formula for the function f in Theorem 3
Characterisation of homotopy ribbon discs
Creators: name: Conway, Anthony
name: Powell, Mark
Publisher: name: arXiv
Year: 2019
Subjects: subject: Geometric Topology (math.GT)
subject: FOS: Mathematics

description: Let $Γ$ be either the infinite cyclic group $\mathbb{Z}$ or the Baumslag-Solitar group $\mathbb{Z} \ltimes \mathbb{Z}[\frac{1}{2}]$. Let $K$ be a slice knot admitting a slice disc $D$ in the 4-ball whose exterior has fundamental group $Γ$. We classify the $Γ$-homotopy ribbon slice discs for $K$ up to topological ambient isotopy rel. boundary. In the infinite cyclic case, there is a unique equivalence class of such slice discs. When $Γ$ is the Baumslag-Solitar group, there are at most two equivalence classes of $Γ$-homotopy ribbon discs, and at most one such slice disc for each lagrangian of the Blanchfield pairing of $K$.
description: 24 pages, 9 figures; v2: a new theorem was added (Theorem 1.6); Theorem 1.7 and Proposition 1.8 fix a statement about the number of slice discs in some of our examples v3: the new theorem from v2 (which is now Theorem 1.8) has been further improved upon; title change. v4. Further minor changes following suggestions from referees
Diapria (Tropidopria) conotoma Kieffer 1911
Creators: name: Notton, David G.
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Chalcididae
Diapria
Diapria conotoma

description: Diapria (Tropidopria) conotoma Kieffer, 1911b: 966.
Valid name
Trichopria conotoma (Kieffer, 1911).
Summary of types
Lectotype ♀, BMNH number 9.725, designated by Notton (1995).
Primary type data
Alsasua/ Spain 30-6; 475.; Spain; Cameron Coll./ 1910-55.; conotoma K.; Type; Holo-/ type; Lectotype ♀ / Diapria Tropidopria / conotoma Kieffer, 1911: 966 / des. Notton, 1995.
Type locality
Spain, Alsasua.
Remarks
This species was described from an unspecified number of females. The lectotype is mounted on a card and is missing its left fore wing. Although the type locality was recorded as Scotland, Cameron (1910) records it from Spain, so this specimen is not excluded from the type series. A Spanish locality is also more likely because this is a largely southern European species which only just extends into south-east England. British material of both sexes of T. conotoma has been examined (specimens in BMNH); the male is identical with the description of Oxypria bouceki Masner, 1959 syn. nov.
description: Published as part of Notton, David G., 2014, A catalogue of the types of Diapriinae (Hymenoptera, Diapriidae) at the Natural History Museum, London, pp. 1-123 in European Journal of Taxonomy 75 on pages 70-71, DOI: 10.5852/ejt.2014.75, http://zenodo.org/record/3862773
End-to-End Single Image Fog Removal using Enhanced Cycle Consistent Adversarial Networks
Creators: name: Liu, Wei
name: Hou, Xianxu
name: Duan, Jiang
name: Qiu, Guoping
Publisher: name: arXiv
Year: 2019
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Single image defogging is a classical and challenging problem in computer vision. Existing methods towards this problem mainly include handcrafted priors based methods that rely on the use of the atmospheric degradation model and learning based approaches that require paired fog-fogfree training example images. In practice, however, prior-based methods are prone to failure due to their own limitations and paired training data are extremely difficult to acquire. Inspired by the principle of CycleGAN network, we have developed an end-to-end learning system that uses unpaired fog and fogfree training images, adversarial discriminators and cycle consistency losses to automatically construct a fog removal system. Similar to CycleGAN, our system has two transformation paths; one maps fog images to a fogfree image domain and the other maps fogfree images to a fog image domain. Instead of one stage mapping, our system uses a two stage mapping strategy in each transformation path to enhance the effectiveness of fog removal. Furthermore, we make explicit use of prior knowledge in the networks by embedding the atmospheric degradation principle and a sky prior for mapping fogfree images to the fog images domain. In addition, we also contribute the first real world nature fog-fogfree image dataset for defogging research. Our multiple real fog images dataset (MRFID) contains images of 200 natural outdoor scenes. For each scene, there are one clear image and corresponding four foggy images of different fog densities manually selected from a sequence of images taken by a fixed camera over the course of one year. Qualitative and quantitative comparison against several state-of-the-art methods on both synthetic and real world images demonstrate that our approach is effective and performs favorably for recovering a clear image from a foggy image.
description: Submitted to IEEE Transactions on Image Processing
FIDUCEO project: (AVHRR): Report on the AVHRR FCDR uncertainty
Creators: name: Taylor, Michael
name: Mittaz, Jon
name: Desmons, Marine
name: Wooliams, Emma
Publisher: name: Zenodo
Year: 2019
Subjects: subject: https://id.loc.gov/authorities/subjects/sh85040468.html
subject: https://id.loc.gov/authorities/subjects/sh85084334.html
subject: https://id.loc.gov/authorities/subjects/sh85101653.html

description: This document is one of the five documents that make up the D2-2 report on traceability chains for FCDRs. Since the original project proposal our thoughts have refined and while this document describes the "sequence of measurement standards and calibrations that is used to relate a measurement result to a reference" (the VIM definition of a traceability chain), it is not presenting this in the form of a chain. This document provides an overview of the uncertainty analysis for the sensors analysed along with the methods to establish metrological traceability for the developed FCDRs and is specifically about the AVHRRFCDR. Document D2-2a provides an overview of the purposes of these documents and explains the basis of the effects tables
description: Previously curated at: http://cedadocs.ceda.ac.uk/1405/ Main files in this record: D2-2 Report on AVHRR FCDR uncertainty.pdf Item originally deposited with Centre for Environmental Data Analysis (CEDA) document repository by Miss Esther Conway. Transferred to CEDA document repository community on Zenodo on 2022-11-24
Weighted Uncertainty Relations
Creators: name: Xiao, Yunlong
name: Jing, Naihuan
name: Li-Jost, Xianqing
name: Fei, Shao-Ming
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Recently, Maccone and Pati have given two stronger uncertainty relations based on the sum of variances and one of them is nontrivial when the quantum state is not an eigenstate of the sum of the observables. We derive a family of weighted uncertainty relations to provide an optimal lower bound for all situations and remove the restriction on the quantum state. Generalization to multi-observable cases is also given and an optimal lower bound for the weighted sum of the variances is obtained in general quantum situation.
description: 10 pages; 1 new reference is added
Curing velocity superselection in non-relativistic QED by restriction to a lightcone
Creators: name: Cadamuro, Daniela
name: Dybalski, Wojciech
Publisher: name: arXiv
Year: 2019
Subjects: subject: Mathematical Physics (math-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences
subject: 81T05, 81V10

description: It is physically expected that plane-wave configurations of the electron in QED induce disjoint representations of the algebra of the electromagnetic fields. This phenomenon of velocity superselection, which is one aspect of the infrared problem, is mathematically well established in non-relativistic (Pauli-Fierz type) models of QED. We show that velocity superselection can be resolved in such models by restricting the electron states to the subalgebra of the fields localized in the future lightcone. This actually follows from a more general statement about equivalence of GNS representations for coherent states of the algebra of the future lightcone in free electromagnetism. Our analysis turns out to be meaningful in the non-relativistic setting and provides evidence in favour of the Buchholz-Roberts approach to infrared problems.
description: 19 pages, 1 figure. New results added
Superconductivity at 7.8 K in the ternary LaRu2As2 compound
Creators: name: Guo, Qi
name: Pan, Bo-Jin
name: Yu, Jia
name: Ruan, Bin-Bin
name: Chen, Dong-Yun
name: Wang, Xiao-Chuan
name: Mu, Qing-Ge
name: Chen, Gen-Fu
name: Ren, Zhi-An
Publisher: name: arXiv
Year: 2016
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Here we report the discovery of superconductivity in the ternary LaRu2As2 compound. The polycrystalline LaRu2As2 samples were synthesized by the conventional solid state reaction method. Powder X-ray diffraction analysis indicates that LaRu2As2 crystallizes in the ThCr2Si2-type crystal structure with the space group I4/mmm (No. 139), and the refined lattice parameters are a = 4.182(6) Å and c = 10.590(3) Å. The temperature dependent resistivity measurement shows a clear superconducting transition with the onset Tc (critical temperature) at 7.8 K, and zero resistivity happens at 6.8 K. The upper critical field at zero temperature m0Hc2(0) was estimated to be 1.6 T from the resistivity measurement. DC magnetic susceptibility measurement shows a bulk superconducting Meissner transition at 7.0 K, and the isothermal magnetization measurement indicates that LaRu2As2 is a type-II superconductor.
description: Science Bulletin,2016
Quick Start Guide: FIDUCEO Ensemble Sea and Lake Surface Temperature Climate Data Record
Creators: name: Perkins, Bethan
Publisher: name: Zenodo
Year: 2019
Subjects: subject: https://id.loc.gov/authorities/subjects/sh85040468.html
subject: https://id.loc.gov/authorities/subjects/sh85084334.html
subject: https://id.loc.gov/authorities/subjects/sh85101653.html

description: Basic handout: FIDUCEO Ensemble Sea and Lake Surface Temperature Climate Data Record
description: Previously curated at: http://cedadocs.ceda.ac.uk/1407/ Main files in this record: D5_5 ST-ens-CDR-quick-start.pdf Item originally deposited with Centre for Environmental Data Analysis (CEDA) document repository by Miss Esther Conway. Transferred to CEDA document repository community on Zenodo on 2022-11-24
MPEC 2024-R61 : 2024 RQ1
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2024
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469
subject: 2024 RQ1

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
The general dielectric tensor for bi-kappa magnetized plasmas
Creators: name: Gaelzer, Rudi
name: Ziebell, Luiz Fernando
name: Meneses, Anelise Ramires
Publisher: name: arXiv
Year: 2016
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: In this paper we derive the dielectric tensor for a plasma containing particles described by an anisotropic superthermal (bi-kappa) velocity distribution function. The tensor components are written in terms of the two-variables kappa plasma special functions, recently defined by Gaelzer and Ziebell [Phys. Plasmas 23, 022110 (2016)]. We also obtain various new mathematical properties for these functions, which are useful for the analytical treatment, numerical implementation and evaluation of the functions and, consequently, of the dielectric tensor. The formalism developed here and in the previous paper provides a mathematical framework for the study of electromagnetic waves propagating at arbitrary angles and polarizations in a superthermal plasma.
description: Accepted for publication in Physics of Plasmas
Is construction grammar cognitive?
Creators: name: Silvennoinen, Olli
Publisher: name: Constructions
Year: 2023

description: This paper examines the view that usage-based construction grammar is a cognitive theory of language. In the usage-based (or cognitive) strand of constructional work, constructions are typically theorised as mental representations. A culmination of this view was Adele Goldberg’s (2006) definition of construction, which states two criteria for construction-hood: formal/functional idiosyncracy and sufficient frequency, which is presumed to lead to a pattern being represented mentally, even redundantly. In this paper, this view is examined against the backdrop of Popper’s three-world ontology, which is complemented with Marr’s three levels of analysis in cognitive science (computational, algorithmic, implementational). The paper argues against treating constructions as mental representations by definition, and it also advocates caution in using the notion of construal in characterising constructional meanings. Constructions are argued to be social conventions that function as intersubjective cues for meaning. They are produced by mental representations but are not coextensive with them. Usage-based construction grammar is a cognitive theory, but only on the computational level, as part of a social cognitive linguistics.
description: Constructions, Bd. 15 Nr. 1 (2023): Special Issue "35 Years of Constructions" (Editors: Lotte Sommerer & Stefan Hartmann)
FIDUCEO project: Product User Guide – Ensemble Sea and Lake Surface Temperature
Creators: name: Merchant, Chris
name: Mittaz, Jon
name: Taylor, Michael
name: Bulgin, Claire
Publisher: name: Zenodo
Year: 2019
Subjects: subject: https://id.loc.gov/authorities/subjects/sh85040468.html
subject: https://id.loc.gov/authorities/subjects/sh85084334.html
subject: https://id.loc.gov/authorities/subjects/sh85101653.html

description: This document describes the Ensemble Sea and Lake Surface Temperature(ST) climate data record (CDR) created by the FIDUCEO project in August 2019 with version designation v0.20. The released data record is based on the MetOp-A Advanced Very High Resolution Radiometer (AVHRR)"easy" FCDR (fundamentalCDR) version 1.0, with additional ST optimisation of the brightness temperature calibration coefficients. The ST CDR is a gridded dataset (level 3 uncollated) at 0.05°latitude-longitude resolution. This product user guide gives: 1. An overview of the specifications of the ST CDR; 2. A high-level description of the implementation of the retrieval processing chain; 3. Information on limitations of this current version of the data record; 4. Technical details on the format and on how to access the data
description: Previously curated at: http://cedadocs.ceda.ac.uk/1408/ Main files in this record: D5_5 PUG - Ensemble Sea and Lake Surface Temperature.pdf Item originally deposited with Centre for Environmental Data Analysis (CEDA) document repository by Miss Esther Conway. Transferred to CEDA document repository community on Zenodo on 2022-11-24
Object Discovery From a Single Unlabeled Image by Mining Frequent Itemset With Multi-scale Features
Creators: name: Zhang, Runsheng
name: Huang, Yaping
name: Pu, Mengyang
name: Zhang, Jian
name: Guan, Qingji
name: Zou, Qi
name: Ling, Haibin
Publisher: name: arXiv
Year: 2019
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: TThe goal of our work is to discover dominant objects in a very general setting where only a single unlabeled image is given. This is far more challenge than typical co-localization or weakly-supervised localization tasks. To tackle this problem, we propose a simple but effective pattern mining-based method, called Object Location Mining (OLM), which exploits the advantages of data mining and feature representation of pre-trained convolutional neural networks (CNNs). Specifically, we first convert the feature maps from a pre-trained CNN model into a set of transactions, and then discovers frequent patterns from transaction database through pattern mining techniques. We observe that those discovered patterns, i.e., co-occurrence highlighted regions, typically hold appearance and spatial consistency. Motivated by this observation, we can easily discover and localize possible objects by merging relevant meaningful patterns. Extensive experiments on a variety of benchmarks demonstrate that OLM achieves competitive localization performance compared with the state-of-the-art methods. We also evaluate our approach compared with unsupervised saliency detection methods and achieves competitive results on seven benchmark datasets. Moreover, we conduct experiments on fine-grained classification to show that our proposed method can locate the entire object and parts accurately, which can benefit to improving the classification results significantly.
Ultimately Thin Metasurface Wave Plates
Creators: name: Keene, David
name: LePain, Matthew
name: Durach, Maxim
Publisher: name: arXiv
Year: 2015
Subjects: subject: Optics (physics.optics)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Optical properties of a metasurface which can be considered a monolayer of two classical uniaxial metamaterials, parallel-plate and nanorod arrays, are investigated. It is shown that such metasurface acts as an ultimately thin sub-50 nm wave plate. This is achieved via an interplay of epsilon-near-zero and epsilon-near-pole behavior along different axes in the plane of the metasurface allowing for extremely rapid phase difference accumulation in very thin metasurface layers. These effects are shown to not be disrupted by non-locality and can be applied to the design of ultrathin wave plates, Pancharatnam-Berry phase optical elements and plasmon-carrying optical torque wrench devices.
description: 12 pages, 7 figures
Towards the implementation of Industry 4.0: A methodology-based approach oriented to the customer life cycle
Creators: name: Ramírez-Durán, Víctor Julio
name: Berges, Idoia
name: Illarramendi, Arantza
Publisher: name: arXiv
Year: 2024
Subjects: subject: Software Engineering (cs.SE)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Many different worldwide initiatives are promoting the transformation from machine dominant manufacturing to digital manufacturing. Thus, to achieve a successful transformation to Industry 4.0 standard, manufacturing enterprises are required to implement a clear roadmap. However, Small and Medium Manufacturing Enterprises (SMEs) encounter many barriers and difficulties (economical, technical, cultural, etc.) in the implementation of Industry 4.0. Although several works deal with the incorporation of Industry 4.0 technologies in the area of the product and supply chain life cycles, which SMEs could use as reference, this is not the case for the customer life cycle. Thus, we present two contributions that can help the software engineers of those SMEs to incorporate Industry 4.0 technologies in the context of the customer life cycle. The first contribution is a methodology that can help those software engineers in the task of creating new software services, aligned with Industry 4.0, that allow to change how customers interact with enterprises and the experiences they have while interacting with them. The methodology details a set of stages that are divided into phases which in turn are made up of activities. It places special emphasis on the incorporation of semantics descriptions and 3D visualization in the implementation of those new services. The second contribution is a system developed for a real manufacturing scenario, using the proposed methodology, which allows to observe the possibilities that this kind of systems can offer to SMEs in two phases of the customer life cycle: Discover & Shop, and Use & Service.
description: Accepted version of paper: V\'ictor Julio Ram\'irez-Dur\'an, Idoia Berges, Arantza Illarramendi: Towards the implementation of Industry 4.0: A methodology-based approach oriented to the customer life cycle. Comput. Ind. 126: 103403 (2021). DOI: 10.1016/j.compind.2021.103403
FIDUCEO project: Upper Troposheric Humidity CDR Quick Start Guide
Creators: name: Perkins, Bethan
Publisher: name: Zenodo
Year: 2019
Subjects: subject: https://id.loc.gov/authorities/subjects/sh85040468.html
subject: https://id.loc.gov/authorities/subjects/sh85084334.html
subject: https://id.loc.gov/authorities/subjects/sh85101653.html

description: Basic handout on FIDUCEO Upper Tropospheric Humidity CDR Quick Start Guide
description: Previously curated at: http://cedadocs.ceda.ac.uk/1409/ Main files in this record: D5_3 UTH_CDR_quick_start_guide_01_30.pdf Item originally deposited with Centre for Environmental Data Analysis (CEDA) document repository by Miss Esther Conway. Transferred to CEDA document repository community on Zenodo on 2022-11-24
The Random Frequency Diverse Array: A New Antenna Structure for Uncoupled Direction-Range Indication in Active Sensing
Creators: name: Liu, Yimin
name: Ruan, Hang
name: Wang, Lei
name: Nehorai, Arye
Publisher: name: arXiv
Year: 2016
Subjects: subject: Information Theory (cs.IT)
subject: Applications (stat.AP)
subject: FOS: Computer and information sciences

description: In this paper, we propose a new type of array antenna, termed the Random Frequency Diverse Array (RFDA), for an uncoupled indication of target direction and range with low system complexity. In RFDA, each array element has a narrow bandwidth and a randomly assigned carrier frequency. The beampattern of the array is shown to be stochastic but thumbtack-like, and its stochastic characteristics, such as the mean, variance, and asymptotic distribution are derived analytically. Based on these two features, we propose two kinds of algorithms for signal processing. One is matched filtering, due to the beampattern's good characteristics. The other is compressive sensing, because the new approach can be regarded as a sparse and random sampling of target information in the spatial-frequency domain. Fundamental limits, such as the Cramér-Rao bound and the observing matrix's mutual coherence, are provided as performance guarantees of the new array structure. The features and performances of RFDA are verified with numerical results.
description: 13 pages, 10 figures
FIDUCEO project: Product user guide – Upper Tropsheric CDRs from microwave sounders
Creators: name: Lang, Theresa
name: Hans, Imke
name: Burgdorf, Martin
name: Bühler, Stefan
Publisher: name: Zenodo
Year: 2019
Subjects: subject: https://id.loc.gov/authorities/subjects/sh85040468.html
subject: https://id.loc.gov/authorities/subjects/sh85084334.html
subject: https://id.loc.gov/authorities/subjects/sh85101653.html

description: This document describes the Upper Tropospheric Humidity (UTH) CDR(version 1.2) data files uploaded to CEMS in February 2019. The released data record is based on the Microwave "easy" FCDR version 4.1 (see Microwave FCDR PUG). The instantaneous observations from the FCDR are used to derive a spatio-temporal averaged data record, which contains monthly mean UTH and brightness temperature mapped to a regular latitude/longitude grid covering the tropical region with a spatial resolution of 1° x1°. It covers all mission years of SSMT2 on F11, F12, F14, F15, AMSU-B on NOAA15-17 and MHS missions (NOAA18, NOAA19, MetopA, Metop-B). This product user guide gives: 1. An overview of the specifications of the data record; 2. A description of the implementation of the retrieval processing chain; 3. Information on limitations of this current version of the data record; 4. Technical details on the format and on how to access the data
description: Previously curated at: http://cedadocs.ceda.ac.uk/1410/ Main files in this record: D5_3 UTH_CDR_PUG_2019_01_30.pdf Item originally deposited with Centre for Environmental Data Analysis (CEDA) document repository by Miss Esther Conway. Transferred to CEDA document repository community on Zenodo on 2022-11-24
Modal analysis using photonic lanterns coupled to arrays of waveguides
Creators: name: Diab, Momen
name: Minardi, Stefano
Publisher: name: arXiv
Year: 2019
Subjects: subject: Optics (physics.optics)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: We present a new concept of an integrated optics component capable of measuring the complex amplitudes of the modes at the tip of a multimode waveguide. The device uses a photonic lantern to split the optical power carried by an $N$-modes waveguide among a collection of single-mode waveguides that excite a periodic array of at least $N^2$ single-mode evanescently-coupled waveguides. The power detected at each output of the array is a linear combination of the products of the modal amplitudes-a relation that can, under suitable conditions, be inverted allowing the derivation of the amplitudes and relative phases of the modal mixture at the input. The expected performance of the device is discussed and its application to the real-time measurement of modal instability in high power fiber lasers is proposed.
description: 5 pages, 4 figures, to be published in Optics Letters
Mitigation of Through-Wall Distortions of Frontal Radar Images using Denoising Autoencoders
Creators: name: Vishwakarma, Shelly
name: Ram, Shobha Sundar
Publisher: name: arXiv
Year: 2019
Subjects: subject: Signal Processing (eess.SP)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Radar images of humans and other concealed objects are considerably distorted by attenuation, refraction and multipath clutter in indoor through-wall environments. While several methods have been proposed for removing target independent static and dynamic clutter, there still remain considerable challenges in mitigating target dependent clutter especially when the knowledge of the exact propagation characteristics or analytical framework is unavailable. In this work we focus on mitigating wall effects using a machine learning based solution -- denoising autoencoders -- that does not require prior information of the wall parameters or room geometry. Instead, the method relies on the availability of a large volume of training radar images gathered in through-wall conditions and the corresponding clean images captured in line-of-sight conditions. During the training phase, the autoencoder learns how to denoise the corrupted through-wall images in order to resemble the free space images. We have validated the performance of the proposed solution for both static and dynamic human subjects. The frontal radar images of static targets are obtained by processing wideband planar array measurement data with two-dimensional array and range processing. The frontal radar images of dynamic targets are simulated using narrowband planar array data processed with two-dimensional array and Doppler processing. In both simulation and measurement processes, we incorporate considerable diversity in the target and propagation conditions. Our experimental results, from both simulation and measurement data, show that the denoised images are considerably more similar to the free-space images when compared to the original through-wall images.