cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The simplest parametrization of equation of state parameter in the scalar field Universe
Creators: name: Shrivastava, Preeti
name: Khan, A. J.
name: Goswami, G. K.
name: Yadav, Anil Kumar
name: Singh, J. K.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: In this paper, we have investigated a scalar field cosmological model of accelerating Universe with the simplest parametrization of equation of state parameter of the scalar field. We used $H(z)$ data, pantheon compilation of SN Ia data and BAO data to constrained the model parameters using $χ^{2}$ minimization technique. We obtain the present values of Hubble constant $H_{0}$ as $66.2^{+1.42}_{-1.34}$, $70.7^{+0.32}_{-0.31}$ and $67.74^{+1.24}_{-1.04}$ for $H(z)$, $H(z)$ + Pantheon and $H(z)$ + BAO respectively. Also, we have estimated the present age of the Universe in derived model $t_{0} = 14.38^{+0.63}_{-0.64}$ for joint $H(z)$ and pantheon compilation of SN Ia data which has only $0.88~σ$ tension with its empirical value obtained in Plank collaboration \cite{Ade/2016}. Moreover, the present values of the deceleration parameter $q_{0}$ come out to be $-0.55^{+0.031}_{-0.038}$, $-0.61^{+0.030}_{-0.021}$ and $-0.627^{+0.022}_{-0.025}$ by bounding the Universe in derived model with $H(z)$, $H(z)$ + Pantheon compilation of SN Ia and $H(z)$ + BAO data sets respectively. We also have performed the state-finder diagnostics to discover the nature of dark energy.
description: 8 Pages, 12 Figures
The marked Brauer category
Creators: name: Kujawa, Jonathan R.
name: Tharp, Benjiman C.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: 17B10, 16G99

description: We introduce the marked Brauer algebra and the marked Brauer category. These generalize the analogous constructions for the ordinary Brauer algebra to the setting of a homogeneous bilinear form on a $\mathbb{Z}_2$-graded vector space. We classify the simple modules of the marked Brauer algebra over any field of characteristic not two. Under suitable assumptions we show that the marked Brauer algebra is in Schur-Weyl duality with the Lie superalgebra, $\mathfrak{g}$, of linear maps which leave the bilinear form invariant. We also provide a classification of the indecomposable summands of the tensor powers of the natural representation for $\mathfrak{g}$ under those same assumptions. In particular, our results generalize Moon's work on the Lie superalgebra of type $\mathfrak{p}(n)$ and provide a unifying conceptual explanation for his results.
description: 20 pages, submitted
The Solar Cycle
Creators: name: Hathaway, David H.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The Solar Cycle is reviewed. The 11-year cycle of solar activity is characterized by the rise and fall in the numbers and surface area of sunspots. A number of other solar activity indicators also vary in association with the sunspots including; the 10.7cm radio flux, the total solar irradiance, the magnetic field, flares and coronal mass ejections, geomagnetic activity, galactic cosmic ray fluxes, and radioisotopes in tree rings and ice cores. Individual solar cycles are characterized by their maxima and minima, cycle periods and amplitudes, cycle shape, the equatorward drift of the active latitudes, hemispheric asymmetries, and active longitudes. Cycle-to-cycle variability includes the Maunder Minimum, the Gleissberg Cycle, and the Gnevyshev-Ohl (even-odd) Rule. Short-term variability includes the 154-day periodicity, quasi-biennial variations, and double-peaked maxima. We conclude with an examination of prediction techniques for the solar cycle and a closer look at cycles 23 and 24.
description: 81 pages, 47 figures, 5 tables, Submitted Oct. 20, 2014 to Living Reviews in Solar Physics
Level structure of Si26 and its implications for the astrophysical reaction rate of Al25(p,γ)Si26
Creators: name: Lister, C.J.
name: Jenkins, D.G.
name: Sinha, S.
name: Shergur, J.
name: Lauritsen, T.
name: Seweryniak, D.
name: Woehr, A.
name: Woods, P.J.
name: Janssens, R.V.F.
name: Davinson, T.
name: Carpenter, M.P.
Publisher: name: American Physical Society
Year: 2007

description: A study of the level structure of Si26 using in-beam γ-ray spectroscopy is presented. A full level scheme is derived incorporating all states lying below the proton threshold energy. The results are in good agreement with shell model predictions and one-to-one correspondence is found with states in the mirror nucleus Mg26. Additionally, a γ-decay branch is observed from a state at 5677.0(17) keV, which is assigned to a 1+ resonance important in the astrophysical reaction Al25(p,γ)Si26. The newly derived resonance energy, Er=159.2(35) keV, has the effect of decreasing the reaction rate at the novae ignition temperature of 0.1 GK by a factor of 2 when compared with the previous most precise measurement of this state.
A possible origin of gamma rays from the Fermi Bubbles
Creators: name: Thoudam, Satyendra
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: One of the most exciting discoveries of recent years is a pair of gigantic gamma-ray emission regions, the so-called Fermi bubbles, above and below the Galactic center. The bubbles, discovered by the Fermi space telescope, extend up to $\sim 50^\circ$ in Galactic latitude and are $\sim 40^\circ$ wide in Galactic longitude. The gamma-ray emission is also found to correlate with radio, microwave and X-rays emission. The origin of the bubbles and the associated non-thermal emissions are still not clearly understood. Possible explanations for the non-thermal emission include cosmic-ray injection from the Galactic center by high speed Galactic winds/jets, acceleration by multiple shocks or plasma turbulence present inside the bubbles, and acceleration by strong shock waves associated with the expansion of the bubbles. In this paper, I will discuss the possibility that the gamma-ray emission is produced by the injection of Galactic cosmic-rays mainly protons during their diffusive propagation through the Galaxy. The protons interact with the bubble plasma producing $π^\circ$-decay gamma rays, while at the same time, radio and microwave synchrotron emissions are produced by the secondary electrons/positrons resulting from the $π^{\pm}$ decays.
description: 6 pages, Talk presented at Cosmic Ray Origin- beyond the standard models, March 2014, Dolomites, Italy; published in Nuclear Physics B Proceedings
Flamelet/transported PDF simulations of ethylene/air jet turbulent non-premixed flame using a three-equation PAH-based soot production model
Creators: name: Nmira, Fatiha
name: Bouffard, Antoine
name: Consalvi, Jean-Louis
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Biophysics
subject: Genetics
subject: FOS: Biological sciences
subject: Evolutionary Biology
subject: Environmental Sciences not elsewhere classified
subject: Chemical Sciences not elsewhere classified
subject: Ecology
subject: Biological Sciences not elsewhere classified
subject: Mathematical Sciences not elsewhere classified
subject: Plant Biology
subject: Computational Biology

description: This article reports flamelet/transported PDF (TPDF) simulations of the well-documented ethylene/air turbulent non-premixed jet flame investigated experimentally at Sandia. The transported PDF equation is solved with the Stochastic Eulerian Field method. The soot production is modelled by a validated three equation PAH-based soot model that predicts the mean soot aggregate properties at low computational time and includes a detailed description of the soot production processes. Gas and soot radiation is modelled using the rank-correlated full-spectrum k model. The turbulence/chemistry/soot production/radiation interactions are taken into account by means of the PDF method. Simulations are run by considering or not soot differential mixing. Based on recent conclusions drawn from Direct Numerical Simulations (Zhou et al., Proc. Combsut. Inst. 38 (2021) 2731–2739), soot differential mixing is modelled by neglecting soot mixing owing to sufficiently large mixing timescales. When soot differential mixing is considered, model predictions reproduce reasonably well the exhaustive set of experimental data, including flame structure, soot statistics and radiative outputs without adjusting parameters. In particular, the predictions demonstrate for the first time the capability of RANS/TPDF models to capture the soot intermittency. On the other hand, neglecting the soot differential mixing produces notable reductions in mean and fluctuating soot volume fraction and soot intermittency. Scatter plot analysis shows that the effects of soot differential mixing are more pronounced in regions of the mixture fraction space where soot surface growth and soot oxidation dominate the soot production, affecting these processes in a non-negligible manner. In an opposite way, soot nucleation and PAH condensation are much less significantly affected. Model results show also that disregarding soot differential mixing reduces the mean soot emission as well the soot emission turbulence/radiation interaction.
Research Data Organisation
Creators: name: van der Burgt, Henry
name: de Laat, Stijn
name: Jansen, Daphne
name: Lamers, Didi
name: Marcoux, Katherine
name: Slouwerhof, Inge
Publisher: name: Zenodo
Year: 2023
Subjects: RDM
research data
data management
research data management
data organisation
metadata
version control
file formats
readme
file names
folder structure
data documentation

description: How to keep track of your data during and after your research? This question is central to this workshop. In this presentation the RDM Support Team of the Radboud University introduces you to the good practices of research data organisation. The workshop discusses what you can do at both the level of your project, your data collection and individual datasets in order to make and keep your research data structured, informative and accessible.
The workshop discusses good practices while leaving space for personal preferences or discipline-specific traditions, providing you with an overview of the various ways in which you can manage your research data in a way that suits your needs. This includes generic strategies such as metadata, READMEs, file names and folder structures and version control and file formats, but also specific documentation practices for both quantitative and qualitative research..
This workshop addresses topics such as:

How to organise and document your research project through either metadata or READMEs.
How to name, structure and organise your research data files.
How to organise the documentation of either qualitative or quantitative research.
Numerical study of $δ$-function current sheets arising from resonant magnetic perturbations
Creators: name: Huang, Yi-Min
name: Hudson, Stuart R.
name: Loizu, Joaquim
name: Zhou, Yao
name: Bhattacharjee, Amitava
Publisher: name: arXiv
Year: 2021
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: General three-dimensional toroidal ideal magnetohydrodynamic equilibria with a continuum of nested flux surfaces are susceptible to forming singular current sheets when resonant perturbations are applied. The presence of singular current sheets indicates that, in the presence of non-zero resistivity, magnetic reconnection will ensue, leading to the formation of magnetic islands and potentially regions of stochastic field lines when islands overlap. Numerically resolving singular current sheets in the ideal MHD limit has been a significant challenge. This work presents numerical solutions of the Hahm-Kulsrud-Taylor (HKT) problem, which is a prototype for resonant singular current sheet formation. The HKT problem is solved by two codes: a Grad-Shafranov (GS) solver and the SPEC code. The GS solver has built-in nested flux surfaces with prescribed magnetic fluxes. The SPEC code implements multi-region relaxed magnetohydrodynamics (MRxMHD), where the solution relaxes to a Taylor state in each region while maintaining force balance across the interfaces between regions. As the number of regions increases, the MRxMHD solution approaches the ideal MHD solution assuming a continuum of nested flux surfaces. We demonstrate excellent agreement between the numerical solutions obtained from the two codes through a thorough convergence study.
Spin Waves and Spatially Anisotropic Exchange Interactions in the $\mathrm{S=2}$ Stripe Antiferromagnet Rb$_{0.8}$Fe$_{1.5}$S$_2$
Creators: name: Wang, Meng
name: Valdivia, P.
name: Yi, Ming
name: Chen, J. X.
name: Zhang, W. L.
name: Ewings, R. A.
name: Perring, T. G.
name: Zhao, Yang
name: Harriger, L. W.
name: Lynn, J. W.
name: Bourret-Courchesne, E.
name: Dai, Pengcheng
name: Lee, D. H.
name: Yao, D. X.
name: Birgeneau, R. J.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: An inelastic neutron scattering study of the spin waves corresponding to the stripe antiferromagnetic order in insulating Rb$_{0.8}$Fe$_{1.5}$S$_2$ throughout the Brillouin zone is reported. The spin wave spectra are well described by a Heisenberg Hamiltonian with anisotropic in-plane exchange interactions. Integrating the ordered moment and the spin fluctuations results in a total moment squared of $27.6\pm4.2μ_B^2$/Fe, consistent with $\mathrm{S \approx 2}$. Unlike $X$Fe$_2$As$_2$ ($X=$ Ca, Sr, and Ba), where the itinerant electrons have a significant contribution, our data suggest that this stripe antiferromagnetically ordered phase in Rb$_{0.8}$Fe$_{1.5}$S$_2$ is a Mott-like insulator with fully localized $3d$ electrons and a high-spin ground state configuration. Nevertheless, the anisotropic exchange couplings appear to be universal in the stripe phase of Fe pnictides and chalcogenides.
description: 5 pages, 4 figures, and together with supplementary information
Additional file 14 of The nuclear and mitochondrial genome assemblies of Tetragonisca angustula (Apidae: Meliponini), a tiny yet remarkable pollinator in the Neotropics
Creators: name: Ferrari, Rafael Rodrigues
name: Ricardo, Paulo Cseri
name: Dias, Felipe Cordeiro
name: de Souza Araujo, Natalia
name: Soares, Dalliane Oliveira
name: Zhou, Qing-Song
name: Zhu, Chao-Dong
name: Coutinho, Luiz Lehmann
name: Arias, Maria Cristina
name: Batista, Thiago Mafra
Publisher: name: figshare
Year: 2024
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Table S14. Genome profile of the stingless bee species sequenced to date and the NCBI accessions for their data
Determining the effective temperatures of G- and K-type giants and supergiants based on observed photometric indices
Creators: name: Lyubimkov, L. S.
name: Poklad, D. B.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: A method for determining the effective temperature Teff of G- and K-type giants and supergiants is proposed. The method is based on the use of two photometric indices free from the interstellar absorption influence: the Q index in the UBV photometric system and the [c1] index in the uvby system. Empirical relations between the Teff values found for nearby and bright G- and K-type giants and supergiants with the use of the infrared fluxes method (IRFM), on the one hand, and the observed Q and [c1] indices for these stars, on the other hand, are plotted. A systematic discrepancy between the dependences of Teff on Q for the stars with standard and reduced metallicities is found. Approximating the plotted dependences with second-order polynomials, one can obtain a relatively simple and a rather accurate method for determining the Teff value in the range of 3800 < Teff < 5100 K (based on the Q index) or 4900 < Teff < 5500 K (based on the [c1] index).
description: 11 pages, 3 figures, 2 tables
Quantum-classical eigensolver using multiscale entanglement renormalization
Creators: name: Miao, Qiang
name: Barthel, Thomas
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: Quantum Gases (cond-mat.quant-gas)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We propose a variational quantum eigensolver (VQE) for the simulation of strongly-correlated quantum matter based on a multi-scale entanglement renormalization ansatz (MERA) and gradient-based optimization. This MERA quantum eigensolver can have substantially lower computation costs than corresponding classical algorithms. Due to its narrow causal cone, the algorithm can be implemented on noisy intermediate-scale quantum (NISQ) devices and still describe large systems. It is particularly attractive for ion-trap devices with ion-shuttling capabilities. The number of required qubits is system-size independent, and increases only to a logarithmic scaling when using quantum amplitude estimation to speed up gradient evaluations. Translation invariance can be used to make computation costs square-logarithmic in the system size and describe the thermodynamic limit. We demonstrate the approach numerically for a MERA with Trotterized disentanglers and isometries. With a few Trotter steps, one recovers the accuracy of the full MERA.
description: 14 pages, 9 figures; additional discussions of the computational complexity, layer-transition maps for homogeneous MERA, mid-circuit qubit resets, and data on the quantum advantage; further minor improvements; published version
A characterization of the algebraic degree in semidefinite programming
Creators: name: Hiep, Dang Tuan
name: Giao, Nguyen Thi Ngoc
name: Van, Nguyen Thi Mai
Publisher: name: arXiv
Year: 2021
Subjects: subject: Algebraic Geometry (math.AG)
subject: Combinatorics (math.CO)
subject: Optimization and Control (math.OC)
subject: FOS: Mathematics
subject: 14N15, 14F43, 68W30, 90C22

description: In this article, we show that the algebraic degree in semidefinite programming can be expressed in terms of the coefficient of a certain monomial in a doubly symmetric polynomial. This characterization of the algebraic degree allows us to use the theory of symmetric polynomials to obtain many interesting results of Nie, Ranestad and Sturmfels in a simpler way.
description: 14 pages
New results on fission cross sections in actinide nuclei using the surrogate ratio method and on conversion coefficients in triaxial strongly deformed bands in167Lu from ice ball and gammasphere
Creators: name: Beausang, C.W.
name: Clark, R.M.
name: Lee, I.Y.
name: Hecht, A.A.
name: Greene, J.P.
name: Fallon, P.
name: Brenner, D.S.
name: Gurdal, G.
name: Escher, J.
name: Ahle, L.
name: Lauritsen, T.
name: Bernstein, L.A.
name: Williams, E.
name: Lesher, S.R.
name: Janssens, R.V.F.
name: Plettner, C.
name: Burke, J.T.
name: Seweryniak, D.
name: McMahan, M.A.
name: Rohrer, J.
name: Phair, L.
name: Lister, C.J.
name: Zhu, S.
name: Carpenter, M.
name: Macchiavelli, A.O.
name: Hartleys, D.J.
name: Ai, H.
name: Crider, B.
Publisher: name: Jagiellonian University
Year: 2007

description: The surrogate ratio technique is described. New results for neutron induced fission cross sections on actinide nuclei, obtained using this technique are presented. The results benchmark the surrogate ratio technique and indicate that the method is accurate to within 5% over a wide energy range. New results for internal conversion coefficients in triaxial strongly deformed bands in 167Lu are also presented.
A method for constructing minimal projective resolutions over idempotent subrings
Creators: name: Klapproth, Carlo
Publisher: name: arXiv
Year: 2021
Subjects: subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: 16E05, 16E10, 16G10

description: We show how to obtain minimal projective resolutions of finitely generated modules over an idempotent subring $Γ_e := (1-e)R(1-e)$ of a semiperfect noetherian basic ring $R$ by a construction inside $\mathsf{mod} R$. This is then applied to investigate homological properties of idempotent subrings $Γ_e$ under the assumption of $R/\langle 1-e\rangle$ being a right artinian ring. In particular, we prove the conjecture by Ingalls and Paquette that a simple module $S_e := eR /\operatorname{rad} eR$ with $\operatorname{Ext}_R^1(S_e,S_e) = 0$ is self-orthogonal, that is $\operatorname{Ext}^k_R(S_e,S_e)$ vanishes for all $k \geq 1$, whenever $\operatorname{gl} R$ and $\operatorname{pdim} eR(1-e)_{Γ_e}$ are finite. Indeed, a slightly more general result is established, which applies to sandwiched idempotent subrings: Suppose $e \in R$ is an idempotent such that all idempotent subrings $Γ$ sandwiched between $Γ_e$ and $R$, that is $Γ_e \subset Γ\subset R$, have finite global dimension. Then the simple summands of $S_e$ can be numbered $S_1, \dots, S_n$ such that $\operatorname{Ext}_R^k(S_i, S_j) = 0$ for $1 \leq j \leq i \leq n$ and all $k > 0$.
description: Accepted for publication at Proceedings of the American Mathematical Society
On the origin of short GRBs with Extended Emission and long GRBs without associated SN
Creators: name: van Putten, Maurice H. P. M.
name: Lee, Gyeong Min
name: Della Valle, Massimo
name: Amati, Lorenzo
name: Levinson, Amir
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The Burst and Transient Source Experiment (BATSE) classifies cosmological gamma-ray bursts (GRBs) into short (less than 2 s) and long (over 2 s) events, commonly attributed to mergers of compact objects and, respectively, peculiar core-collapse supernovae. This standard classification has recently been challenged by the {\em Swift} discovery of short GRBs showing Extended Emission (SGRBEE) and nearby long GRBs without an accompanying supernova (LGRBN). Both show an initial hard pulse, characteristic of SGRBs, followed by a long duration soft tail. We here consider the spectral peak energy ($E_{p,i}$)-radiated energy $(E_{iso})$ correlation and the redshift distributions to probe the astronomical and physical origin of these different classes of GRBs. We consider {\em Swift} events of $15$ SGRBs, $7$ SGRBEEs, 3 LGRBNs and 230 LGRBs. The spectral-energy properties of the initial pulse of both SGRBEE and LGRBNs are found to coincide with those of SGRBs. A Monte Carlo simulation shows that the redshift distributions of SGRBs, SGRBEE and LGRBNs fall outside the distribution of LGRBs at 4.75$\,σ$, 4.67$\,σ$ and 4.31$σ$, respectively. A distinct origin of SGRBEEs with respect to LGRBs is also supported by the elliptical host galaxies of the SGRBEE events 050509B and 050724. This combined evidence supports the hypothesis that SGRBEE and LGRBNs originate in mergers as SGRBs. Moreover, long/soft tail of SGRB and LGRBNs satisfy the same $E_{p,i}-E_{iso}$ Amati-correlation holding for normal LGRBs. This fact points to rapidly rotating black holes as a common long-lived inner engine produced by different astronomical progenitors (mergers and supernovae).
Information diagrams in the study of entanglement in symmetric multi-quDit systems and applications to quantum phase transitions in Lipkin-Meshkov-Glick D-level atom models
Creators: name: Guerrero, Julio
name: Mayorgas, Alberto
name: Calixto, Manuel
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: In this paper we pursue the use of information measures (in particular, information diagrams) for the study of entanglement in symmetric multi-quDit systems. We use generalizations to U(D) of spin U(2) coherent states and their adaptation to parity (multicomponent Schrödinger cats) and we analyse one- and two-quDit reduced density matrices. We use these correlation measures to characterize quantum phase transitions occurring in Lipkin-Meshkov-Glick models of D=3-level identical atoms and we propose the rank of the corresponding reduced density matrix as a discrete order parameter.
description: Latex file, 15 pages, 17 figures. arXiv admin note: text overlap with arXiv:2104.10581
Similarity Contrastive Estimation for Self-Supervised Soft Contrastive Learning
Creators: name: Denize, Julien
name: Rabarisoa, Jaonary
name: Orcesi, Astrid
name: Hérault, Romain
name: Canu, Stéphane
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Artificial Intelligence (cs.AI)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Contrastive representation learning has proven to be an effective self-supervised learning method. Most successful approaches are based on Noise Contrastive Estimation (NCE) and use different views of an instance as positives that should be contrasted with other instances, called negatives, that are considered as noise. However, several instances in a dataset are drawn from the same distribution and share underlying semantic information. A good data representation should contain relations, or semantic similarity, between the instances. Contrastive learning implicitly learns relations but considering all negatives as noise harms the quality of the learned relations. To circumvent this issue, we propose a novel formulation of contrastive learning using semantic similarity between instances called Similarity Contrastive Estimation (SCE). Our training objective is a soft contrastive learning one. Instead of hard classifying positives and negatives, we estimate from one view of a batch a continuous distribution to push or pull instances based on their semantic similarities. This target similarity distribution is sharpened to eliminate noisy relations. The model predicts for each instance, from another view, the target distribution while contrasting its positive with negatives. Experimental results show that SCE is Top-1 on the ImageNet linear evaluation protocol at 100 pretraining epochs with 72.1% accuracy and is competitive with state-of-the-art algorithms by reaching 75.4% for 200 epochs with multi-crop. We also show that SCE is able to generalize to several tasks. Source code is available here: https://github.com/CEA-LIST/SCE.
description: Accepted to IEEE Winter Conference on Applications of Computer Vision (WACV) 2023
Additional file 15 of The nuclear and mitochondrial genome assemblies of Tetragonisca angustula (Apidae: Meliponini), a tiny yet remarkable pollinator in the Neotropics
Creators: name: Ferrari, Rafael Rodrigues
name: Ricardo, Paulo Cseri
name: Dias, Felipe Cordeiro
name: de Souza Araujo, Natalia
name: Soares, Dalliane Oliveira
name: Zhou, Qing-Song
name: Zhu, Chao-Dong
name: Coutinho, Luiz Lehmann
name: Arias, Maria Cristina
name: Batista, Thiago Mafra
Publisher: name: figshare
Year: 2024
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Fig. S1. Six quality parameters of the PacBio long-read sequencing obtained through a LongQC assessment
Nuclear charge radius of He8
Creators: name: Dubois, M.
name: Villari, A.C.C.
name: Lecesne, N.
name: Alves-Condé, R.
name: Alcántara-Núñez, J.A.
name: Mueller, P.
name: Eléon, C.
name: Saint-Laurent, M.-G.
name: Lu, Z.-T.
name: Gaubert, G.
name: Thomas, J.-C.
name: O'Connor, T.P.
name: Wang, L.-B.
name: Drake, G.W.F.
name: Sulai, I.A.
name: Janssens, R.V.F.
name: Bailey, K.
name: Holt, R.J.
Publisher: name: American Physical Society
Year: 2007

description: The root-mean-square (rms) nuclear charge radius of He8, the most neutron-rich of all particle-stable nuclei, has been determined for the first time to be 1.93(3) fm. In addition, the rms charge radius of He6 was measured to be 2.068(11) fm, in excellent agreement with a previous result. The significant reduction in charge radius from He6 to He8 is an indication of the change in the correlations of the excess neutrons and is consistent with the He8 neutron halo structure. The experiment was based on laser spectroscopy of individual helium atoms cooled and confined in a magneto-optical trap. Charge radii were extracted from the measured isotope shifts with the help of precision atomic theory calculations.
Broad band turbulent spectra in gamma-ray burst light curves
Creators: name: van Putten, Maurice H. P. M.
name: Guidorzi, Cristiano
name: Frontera, Filippo
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Broad band power density spectra offer a window to understanding turbulent behavior in the emission mechanism and, at the highest frequencies, in the putative inner engines powering long GRBs. We describe a chirp search method which steps aside Fourier analysis for signal detection in the Poisson noise-dominated 2 kHz sampled BeppoSAX light curves. An efficient numerical implementation is described in $O(Nn\log n)$ operations, where $N$ is the number of chirp templates and $n$ is the length of the light curve time series, suited for embarrassingly parallel processing. For detection of individual chirps of duration $τ=1$ s, the method is one order of magnitude more sensitive in SNR than Fourier analysis. The Fourier-chirp spectra of GRB 010408 and GRB 970816 show a continuation of the spectral slope up to 1 kHz of turbulence identified in low frequency Fourier analysis. The same continuation is observed in an ensemble averaged spectrum of 40 bright long GRBs. An outlook on a similar analysis of upcoming gravitational wave data is included.
Source-Free Exchange-Correlation Magnetic Fields in the FLAPW Method
Creators: name: Neukirchen, Alexander
Publisher: name: Forschungzentrum Jülich
Year: 2020

description: Masterarbeit, RWTH Aachen, 2020; Forschungszentrum Jülich 90 p. (2020). = Masterarbeit, RWTH Aachen, 2020
description: A proposed modification of the exchange-correlation magnetic field in density functional theory is implemented into the all-electron full-potential linearized augmented-plane-wave code Fleur. By removing terms from the magnetic field that stem from source contributions not found for physical ones, a recent paper has shown that theprediction of Fe magnetic moments in iron pnictide materials can be improved vastly while conserving the accurate description of simpler materials. The theory justifyingthe idea is explored and the physicality of the modification is discussed. The interaction of the modification with different kinds of magnets is highlighted, the possibleconstraints in application are explained and justified and the results are compared to those from the original paper calculated via the Elk code. Furthermore, theeffect on the coupling parameters in a Heisenberg model is investigated to gain greater insight about how the modification works and why the improvements happen.
description: Published by Forschungszentrum Jülich
Porous cylinder arrays for optimal wake and drag characteristics
Creators: name: Nair, Aishwarya
name: Kazemi, Amirkhosro
name: Curet, Oscar
name: Verma, Siddhartha
Publisher: name: arXiv
Year: 2022
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: The root systems of mangroves, a tree species found in intertidal tropical and sub-tropical coastal zones, provide a natural barrier that dissipates wave energy effectively and reduces sediment erosion. In this work, we use a combination of experiments and numerical simulations to examine the wake and drag characteristics of porous arrays of cylinders, which serve as simplified models of mangrove root networks. Optimal arrangements of the arrays are obtained by coupling Navier-Stokes simulations with a multi-objective optimization algorithm, which seeks configurations that minimize wake enstrophy and maximize drag acting on the porous structure. These optimal configurations are investigated using Particle Image Velocimetry, and the internal and external flow around the porous arrays are analyzed using a combination of Proper Orthogonal Decomposition and Lagrangian particle tracking. Large variations in drag and enstrophy are observed by varying the relative positions of the cylinders, which indicates that the geometrical arrangement of porous arrays plays a prominent role in determining wake and drag characteristics. A sensitivity analysis suggests that enstrophy is more sensitive than drag to specific cylinder placement, and depends on distinctive flow patterns that develop in the interior due to interactions among individual cylinders. Arrays with higher drag are found to have higher average flow speeds in the wake and give rise to time-varying Lagrangian Coherent Structures, making them unfavorable for particle deposition and erosion. Overall, the results indicate that high-level metrics such as array porosity may not be sufficient on their own for predicting wake and drag characteristics.
description: 30 pages, 22 figures
Nuclear shapes of highly deformed bands in Hf171,172 and neighboring Hf isotopes
Creators: name: Janssens, R.V.F.
name: Hartley, D.J.
name: Ødegård, S.
name: Chowdhury, P.
name: Carpenter, M.P.
name: Afanasjev, A.V.
name: Yadav, R.B.
name: Ma, W.C.
name: Zhang, Y.C.
name: Khoo, T.L.
name: Djongolov, M.K.
name: Cullen, D.M.
name: Roux, D.G.
name: Moore, E.F.
name: Rigby, S.V.
name: Kondev, F.G.
name: Scholes, D.T.
name: Riedinger, L.L.
name: Zhu, S.
name: Lauritsen, T.
name: Zhang, J.-Y.
name: Begnaud, J.
name: Hagemann, G.B.
name: Ngijoi-Yogo, E.
Publisher: name: American Physical Society
Year: 2007

description: A Gammasphere experiment was carried out to search for triaxial strongly deformed (TSD) structures in Hf171,172 and the wobbling mode, a unique signature of nuclei with stable triaxiality. Three strongly deformed bands in Hf172 and one in Hf171 were identified through Ca48(Te128, xn) reactions. Linking transitions were established for the band in Hf171 and, consequently, its excitation energies and spins (up to 111/2) were firmly established. However, none of the Hf172 sequences were linked to known structures. Experimental evidence of triaxiality was not observed in these bands. The new bands are compared with other known strongly deformed bands in neighboring Hf isotopes. Theoretical investigations within various models have been performed. Cranking calculations with the Ultimate Cranker code suggest that the band in Hf171 and two previously proposed TSD candidates in Hf170 and Hf175 are built on proton (i13/2h9/2) configurations, associated with near-prolate shapes and deformations enhanced with respect to the normal deformed bands. Cranked relativistic mean-field calculations suggest that band 2 in Hf175 has most likely a near-prolate superdeformed shape involving the πi13/2νj15/2 high-j intruder orbitals. It is quite likely that the bands in Hf172 are similar in character to this band.
The web-based simulation and information service for multi-hazard impact chains. Design document
Creators: name: Van Westen, Cees
name: Naz, Iqra
name: Atun, Funda
name: Hassinger, Liv
name: van den Bout, Bastian
name: Flacke, Johannes
name: Manzella, Irene
name: Marr, Philipp
name: Agmon, Gal
name: Ottow, Bouke
name: Hurlimann, Marcel
name: Kuman, PAvan Yeditha
name: Cocuccioni, Silvia
name: Schollerer, Lea
name: Kulakowska, Michalina
name: Koelle, Bettina
name: Ermolieva, Tatiana
name: Twayana, Rabina
Publisher: name: Zenodo
Year: 2023
Subjects: PARATUS
Platform
compounding events
Multi-hazard
Cascading events
Impact chains
RiskChanges
risk assessment

description: The overall objective of the PARATUS project and the platform is the co-development of a web-based simulation and information service for first and second responders and other stakeholders to evaluate the impact chains of multi-hazard events with particular emphasis on cross-border and cascading impacts. This deliverable provides a first impression of the platform and its components. A central theme in the PARATUS project is the co-development of the tools with stakeholders. The central stakeholders within the four applications case studies are therefore full project partners. They will be directly involved in the development of the platform. We foresee that the PARATUS Platform will have two major blocks: an information service that provides static information (or regularly updated information) and simulation service, which is a dynamic component where stakeholders can interactively work with the tools in the platform. The PARATUS will further make sure that documentation (e.g., software accompanying documentation) is also publicly available via the project website (https://www.paratus-project.eu/ ) and other trusted repositories. The deliverable 4.1 was submitted to the European Commission on 31/07/2023 and is waiting for approval by the Research Executive Agency. Therefore, this current version may not represent the final version of the deliverable.
Nucleon transfer reactions with exotic beams at ATLAS
Creators: name: Moore, E.F.
name: Pieper, S.C.
name: Lighthall, J.C.
name: Paul, M.
name: Jisonna, L.
name: Wuosmaa, A.H.
name: Sinha, S.
name: Rehm, K.E.
name: Tang, X.
name: Peterson, D.
name: Henderson, D.J.
name: Segal, R.E.
name: Wiringa, R.B.
name: Pardo, R.C.
name: Marley, S.T.
name: Greene, J.P.
name: Janssens, R.V.F.
name: Siemssen, R.H.
name: Savard, G.
name: Patel, N.
name: Schiffer, J.P.
name: Jiang, C.L.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2007

description: We present some recent results from studies of light nuclei using exotic beams from ATLAS at Argonne National Laboratory. Light nucleifar from stability provide ideal testing grounds for modern theoretical methods, and may provide information about astrophysical environments. We focus on the nuclei 9Li and 7He, populated with the (d,p) and (d,3He) reactions.
Extreme luminosities in ejecta produced by intermittent outflows around rotating black holes
Creators: name: van Putten, Maurice H. P. M.
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Extreme sources in the Transient Universe show evidence of relativistic outflows from intermittent inner engines, such as cosmological gamma-ray bursts. They probably derive from rotating back holes interacting with surrounding matter. We show that these interactions are enhanced inversely proportional to the duty cycle in advection of magnetic flux, as may apply at high accretion rates. We demonstrate the morphology and ballistic propagation of relativistic ejecta from burst outflows by numerical simulations in relativistic magnetohydrodynamics. Applied to stellar mass black holes in core-collapse of massive stars, it provides a robust explosion mechanism as a function of total energy output. At breakout, these ejecta may produce a low-luminosity GRB. A long GRB may ensue from an additional ultra-relativistic baryon-poor inner jet from a sufficiently long-lived intermittent inner engine. The simulations demonstrate a complex geometry in mergers of successive ejecta, whose mixing and shocks provide a pathway to broadband high energy emission from magnetic reconnection and shocks.
description: MNRASL, to appear
Mahler discrete residues and summability for rational functions
Creators: name: Arreche, Carlos E.
name: Zhang, Yi
Publisher: name: arXiv
Year: 2022
Subjects: subject: Number Theory (math.NT)
subject: Commutative Algebra (math.AC)
subject: FOS: Mathematics
subject: I.1.2
subject: 39A06 (Primary), 12H10 (Secondary)

description: We construct Mahler discrete residues for rational functions and show that they comprise a complete obstruction to the Mahler summability problem of deciding whether a given rational function $f(x)$ is of the form $g(x^p)-g(x)$ for some rational function $g(x)$ and an integer $p > 1$. This extends to the Mahler case the analogous notions, properties, and applications of discrete residues (in the shift case) and $q$-discrete residues (in the $q$-difference case) developed by Chen and Singer. Along the way we define several additional notions that promise to be useful for addressing related questions involving Mahler difference fields of rational functions, including in particular telescoping problems and problems in the (differential) Galois theory of Mahler difference equations.
description: 21 pages. Submitted
Additional file 16 of The nuclear and mitochondrial genome assemblies of Tetragonisca angustula (Apidae: Meliponini), a tiny yet remarkable pollinator in the Neotropics
Creators: name: Ferrari, Rafael Rodrigues
name: Ricardo, Paulo Cseri
name: Dias, Felipe Cordeiro
name: de Souza Araujo, Natalia
name: Soares, Dalliane Oliveira
name: Zhou, Qing-Song
name: Zhu, Chao-Dong
name: Coutinho, Luiz Lehmann
name: Arias, Maria Cristina
name: Batista, Thiago Mafra
Publisher: name: figshare
Year: 2024
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Fig. S2. Eight quality parameters of 2 × 101 (SR1) Illumina short-read sequencing (R1) based on FastQC analysis
InTheMED M4.4 Third Living Lab for Building Simulation-Based Scenario Analyses and Policy Design
Creators: name: Saysel, Ali Kerem
name: Daloğlu Çetinkaya, İrem
name: Uygur, İzel
name: Copty, Nadim
Publisher: name: Zenodo
Year: 2023
Subjects: Living Lab
Konya Closed Basin
Simulation-Based Scenario Analyses

description: This is the documentation of M4.4 of the “Innovative and Sustainable Groundwater Management in the Mediterranean” Grant Agreement Number 1923 project. The document provides information on the preparations, participants, and activities of the milestone M4.4 “Third Living Lab for building simulation-based scenario analyses and policy design”.
description: This project is part of the PRIMA Programme supported by the European Union's Horizon 2020 Research and Innovation Programme under Grant Agreement No 1923.
Supplementary Results for ‘Constraining tectonic information from the main drainage divide of a mountain belt’
Creators: name: Chuanqi He
name: Ci-Jian Yang
name: Turowski, Jens M.
name: Rao, Gang
name: Duna C. Roda-Boluda
name: Yuan, Xiao-Ping
Publisher: name: figshare
Year: 2020
Subjects: subject: Geology
subject: FOS: Earth and related environmental sciences
subject: 40402 Geodynamics
subject: 40601 Geomorphology and Regolith and Landscape Evolution
subject: 40312 Structural Geology
subject: 40607 Surface Processes
subject: 40313 Tectonics

description: The files go with the manuscript of He et al. Constraining tectonic information from the main drainage divide of a mountain belt. Nature Communications (Under consideration). The source data underlying Figs. 1e, S1–S4, S6, S11, S12, and topographic data for Southern Taiwan and NE Sicily (hillslope length, channel steepness) are provided as a Source Data file. The Source Data file, topographies of all the numerical models at 300 Myr, Supplementary Movie S1, and a Matlab script that can generate a divide location for different geological settings were deposited in figshare. Other relevant data supporting the findings of the study are available in the Supplementary Information, or from the corresponding author upon request.
One-particle excitations outside the 54Ti semi-magic core: The 55V and 55Ti yrast structures
Creators: name: Carpenter, M.P.
name: Honma, M.
name: Kay, B.P.
name: Zhu, S.
name: Lauritsen, T.
name: Wrzesiński, J.
name: Freeman, S.J.
name: Kozemczak, J.
name: Kondev, F.G.
name: Smith, J.F.
name: Seweryniak, D.
name: Mantica, P.F.
name: Fornal, B.
name: Królas, W.
name: Wang, X.
name: Lister, C.J.
name: Broda, R.
name: Deacon, A.N.
name: Janssens, R.V.F.
name: Robinson, A.
name: Pawłat, T.
name: Otsuka, T.
name: Tomlin, B.E.
name: Steppenbeck, D.
name: Liddick, S.N.
name: Larabee, A.
Publisher: name: Elsevier
Year: 2007

description: The level structures of 55V and 55Ti, the two nuclei with a single nucleon outside the semi-magic 5422Ti32 core, have been investigated in order to provide new tests of full pf-shell calculations with the GXPF1A interaction. The addition of a proton does not appear to affect the N = 32 shell gap significantly, although comparisons between calculations and experiment at high spins (Iπ ≥ 21 / 2-) indicate the need for a larger model space for an accurate description of the data in this regime. The energy separation between the ν p1 / 2 and ν f5 / 2 orbitals in neutron-rich Ti isotopes is not large enough to result in an N = 34 shell gap. However, comparisons between the 55Ti data and the calculations argue for the presence of a sizable N = 34 gap in 54Ca.
Parallelized Traveling Cluster Approximation to Study Numerically Spin-Fermion Models on Large Lattices
Creators: name: Mukherjee, Anamitra
name: Patel, Niravkumar D.
name: Bishop, Chris
name: Dagotto, Elbio
Publisher: name: arXiv
Year: 2015
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Lattice spin-fermion models are important to study correlated systems where quantum dynamics allows for a separation between slow and fast degrees of freedom. The fast degrees of freedom are treated quantum mechanically while the slow variables, generically refereed to as the "spins", are treated classically. At present, exact diagonalization coupled with classical Monte Carlo (ED+MC) is extensively used to solve numerically a general class of lattice spin-fermion problems. In this common setup, the classical variables (spins) are treated via the standard MC method while the fermion problem is solved by exact diagonalization. The "Traveling Cluster Approximation" (TCA) is a real space variant of the ED+MC method that allows to solve spin-fermion problems on lattice sizes with up to $10^3$ sites. In this publication, we present a novel reorganization of the TCA algorithm in a manner that can be efficiently parallelized. This allows us to solve generic spin-fermion models easily on $10^4$ lattice sites and with some effort on $10^5$ lattice sites, representing the record lattice sizes studied for this family of models.
Detection and treatment of outliers for multivariate robust loss reserving
Creators: name: Avanzi, Benjamin
name: Lavender, Mark
name: Taylor, Greg
name: Wong, Bernard
Publisher: name: arXiv
Year: 2022
Subjects: subject: Methodology (stat.ME)
subject: Risk Management (q-fin.RM)
subject: Applications (stat.AP)
subject: FOS: Computer and information sciences
subject: FOS: Economics and business
subject: 91G70, 62P05

description: Traditional techniques for calculating outstanding claim liabilities such as the chain ladder are notoriously at risk of being distorted by outliers in past claims data. Unfortunately, the literature in robust methods of reserving is scant, with notable exceptions such as Verdonck and Debruyne (2011) and Verdonck and Van Wouwe (2011). In this paper, we put forward two alternative robust bivariate chain-ladder techniques to extend the approach of Verdonck and Van Wouwe (2011). The first technique is based on Adjusted Outlyingness (Hubert and Van der Veeken, 2008) and explicitly incorporates skewness into the analysis whilst providing a unique measure of outlyingness for each observation. The second technique is based on bagdistance (Hubert et al., 2016) which is derived from the bagplot however is able to provide a unique measure of outlyingness and a means to adjust outlying observations based on this measure. Furthermore, we extend our robust bivariate chain-ladder approach to an N-dimensional framework. The implementation of the methods, especially beyond bivariate, is not trivial. This is illustrated on a trivariate data set from Australian general insurers, and results under the different outlier detection and treatment mechanisms are compared.