cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
title: Efficient Self-Supervised Visual Representation Learning via Sparsity
Creators: name: Sameni, Sepehr
Publisher: name: Universität Bern
Year: 2024
Subjects: subject: 000 Computer science, knowledge & systems
subject: 510 Mathematics
subject: 620 Engineering

description: Large collections of labeled data have greatly improved the performance of Deep Neural Networks in computer vision tasks. However, the vast majority of visual data generated daily remains unlabeled, limiting the potential of supervised learning paradigms. This thesis explores novel techniques to guide deep models towards learning generalizable visual patterns without human supervision, with a particular focus on leveraging sparsity as a key principle.
Our primary tool in this endeavor is the design of Self-Supervised Learning (SSL) tasks that do not require manual labeling. Beyond enabling learning from vast amounts of unlabeled data, we demonstrate how sparsity-based self-supervision can capture relevant patterns often overlooked by traditional supervised approaches. We design learning tasks that extract rich representations from various visual modalities: shape information from images, temporal dynamics from videos, and multimodal understanding from vision-language data.
A common thread running through our work is the strategic application of sparsity. In contrastive learning, we show how token sparsity can enhance both computational efficiency and representation quality. For video analysis, we leverage spatio-temporal sparsity to enable efficient and scalable representation learning. In generative tasks, we demonstrate how sparse conditioning can tackle complex problems like video prediction while implicitly modeling world dynamics.
Notably, our task designs follow a unifying principle: the recognition and manipulation of sparse patterns in data. The strong performance of the learned representations on downstream vision tasks such as image classification, video understanding, and multimodal reasoning validates this approach.
By consistently demonstrating that thoughtful application of sparsity can not only reduce computational demands but often improve the quality and generalizability of learned representations, this work lays a foundation for more efficient, scalable, and effective visual understanding systems. Our contributions pave the way for artificial systems with visual perception and reasoning capabilities that can better leverage the vast amounts of unlabeled visual data surrounding us.
Asymmetric Ferromagnetic Criticality in Pyrochlore Ferromagnet Lu$_2$V$_2$O$_7$
Creators: name: Su, N.
name: Li, F. -Y.
name: Jiao, Y. Y.
name: Liu, Z. Y.
name: Sun, J. P.
name: Wang, B. S.
name: Sui, Y.
name: Zhou, H. D.
name: Chen, G.
name: Cheng, J. -G.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Critical phenomenon at the phase transition reveals the universal and long-distance properties of the criticality. We study the ferromagnetic criticality of the pyrochlore magnet Lu$_2$V$_2$O$_7$ at the ferromagnetic transition ${T_\text{c}\approx 70\, \text{K}}$ from the isotherms of magnetization $M(H)$ via an iteration process and the Kouvel-Fisher method. The critical exponents associated with the transition are determined as ${β= 0.32(1)}$, ${γ= 1.41(1)}$, and ${δ= 5.38}$. The validity of these critical exponents is further verified by scaling all the $M(H)$ data in the vicinity of $T_\text{c}$ onto two universal curves in the plot of $M/|\varepsilon|^β$ versus $H/|\varepsilon|^{β+γ}$, where ${\varepsilon = T/T_\text{c} -1}$. The obtained $β$ and $γ$ values show asymmetric behaviors on the ${T < T_\text{c}}$ and the ${T > T_\text{c}}$ sides, and are consistent with the predicted values of 3D Ising and cubic universality classes, respectively. This makes Lu$_2$V$_2$O$_7$ a rare example in which the critical behaviors associated with a ferromagnetic transition belong to different universality classes. We describe the observed criticality from the Ginzburg-Landau theory with the quartic cubic anisotropy that microscopically originates from the anti-symmetric Dzyaloshinskii-Moriya interaction as revealed by recent magnon thermal Hall effect and theoretical investigations.
description: 6 pages, 4 figures, submit on the behalf of Dr. J-G Cheng. First two authors contributed equally
Lepanomus crinalis subsp. crinalis crinalis Balfour-Browne 1945
Creators: name: Wanat, Marek
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Brentidae
Lepanomus
Lepanomus crinalis
Lepanomus crinalis crinalis balfour-Browne, 1945

description: Lepanomus crinalis crinalis Balfour-Browne, 1945
(Figs. 190, 192, 194, 213, 214, 228, 294)
 Material examined. Eastern Cape: Katberg, 11- 18.02.1933, 1 ex., leg. R. E. Turner (BMNH); Pondoland: Port St. Johns, 15- 31.05.1923, 1 ♂ 1 ♀ —leg. R. E. Turner (BMNH); Silaka Reserve nr. Port St Johns, - 31.6532S / 29.5068E, 10-20 m alt., 13.11.2013, 1 ex., leg. R. Ruta; nr. bridge on Gxwaleni river, - 31.6527S /29.5064, 12 m alt., 28.11.2019, 1 ex.; main road to beach camp, - 31.6536S / 29.5057E, 15 m alt., 29.11.2019, 20 exs, 1- 2.12.2019, 68 exs; Jongelwandle trail, - 31.6561S / 29.5049E, 15 m alt., 1.12.2019, 7 exs—all beaten from Apodytes dimidiata, leg. MW (MWC, TMSA, SANC, ISAM, DNSM, CGC). Western Cape: Wilderness Nat. Park, Serpentine river valley, - 33.9945S / 22.6180E; 5 m alt., riverine fynbos, 29.11.2013, 1 ♂, leg. MW (MWC).
 Diagnosis. Prorostrum distinctly narrowing apicad, measured in its mid-length in ♂ 0.90 ×, in ♀ 0.80 × as broad as metarostrum (Figs. 190, 192). Third elytral interval between middle and posterior two-thirds raised to form low rib evidently higher than neighbouring intervals (Fig. 194), the rib ending abruptly at small yellowish patch of integument. Spermatheca as in Fig. 228.
The remaining characters as in the above genus description.
 Remarks. Variation. The only specimen from Western Cape (Wilderness) differs from locotypical series in the much larger basal lightening of elytra, fully encompassing humeral calli and elytral base, and extending apicad as a uniform triangular yellowish fleck, narrowly contiguous with the median crescentic mark along the sutural interval. It is not distinct from the series from Port St. Johns in the shape of rostrum, and it shares the presence of an elevated rib on the 3 rd elytral interval. Further material from the most southern part of the area of L. crinalis is necessary to shed more light on the taxonomic relevance of this difference in colour pattern.
 Biology. In the locus typicus (Port St Johns: Silaka Reserve) this species was recently collected in numbers from flowering Apodytes dimidiata, while practically absent from non-flowering trees. This suggests its development occurs in generative parts of the plant, but it has not yet been confirmed by direct observations and the preimaginal stages await discovery.
 Distribution. South-eastern R.S.A. (Eastern Cape, Western Cape) (Fig. 294).
description: Published as part of Wanat, Marek, 2021, New basal taxa of South African Apioninae (Coleoptera: Curculionoidea: Brentidae), pp. 1-60 in Zootaxa 5035 (1) on pages 37-38, DOI: 10.11646/zootaxa.5035.1.1, http://zenodo.org/record/5499024
Adiabatic Fock state generation scheme using Kerr nonlinearity
Creators: name: Yanagimoto, Ryotatsu
name: Ng, Edwin
name: Onodera, Tatsuhiro
name: Mabuchi, Hideo
Publisher: name: arXiv
Year: 2018
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We propose a theoretical scheme to deterministically generate Fock states in a Kerr cavity thorough adiabatic variation of the driving field strength and the cavity detuning. We show that the required time to generate a $n$-photon Fock state scales as the square root of $n$. Requirements for the Kerr coefficient relative to the system decoherence rate are provided as a function of desired state fidelity, indicating that the scheme is potentially realizable with the present state of the art in microwave superconducting circuits.
Additional file 1 of SplicedFamAlign: CDS-to-gene spliced alignment and identification of transcript orthology groups
Creators: name: Jammali, Safa
name: Jean-David Aguilar
name: Esaie Kuitche
name: AĂŻda Ouangraoua
Publisher: name: figshare
Year: 2019
Subjects: subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Evolutionary Biology
subject: 69999 Biological Sciences not elsewhere classified
subject: 80699 Information Systems not elsewhere classified
subject: FOS: Computer and information sciences
subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics
subject: Developmental Biology

description: Pseudocode of algorithms for SplicedFamAlign steps. A file at the PDF format describing the algorithms used in the SFA method for the preliminary step of splicing structure prediction (Algorithm 1), the first step of local alignment (Algorithm 2), and the second step of gapped extension of anchors (Algorithm 3). (PDF 110 kb)
General approach to the study of vacuum space-times with an isometry
Creators: name: Fayos, Francesc
name: Sopuerta, Carlos F.
Publisher: name: arXiv
Year: 2000
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In vacuum space-times the exterior derivative of a Killing vector field is a 2-form (named here as the Papapetrou field) that satisfies Maxwell's equations without electromagnetic sources. In this paper, using the algebraic structure of the Papapetrou field, we will set up a new formalism for the study of vacuum space-times with an isometry, which is suitable to investigate the connections between the isometry and the Petrov type of the space-time. This approach has some advantages, among them, it leads to a new classification of these space-times and the integrability conditions provide expressions that determine completely the Weyl curvature. These facts make the formalism useful for application to any problem or situation with an isometry and requiring the knowledge of the curvature.
description: 24 pages, LaTeX2e, IOP style. To appear in Classical and Quantum Gravity
Additional file 1 of A cassava common mosaic virus vector for virus-induced gene silencing in cassava
Creators: name: Tuo, Decai
name: Zhou, Peng
name: Yan, Pu
name: Cui, Hongguang
name: Liu, Yang
name: Wang, He
name: Yang, Xiukun
name: Liao, Wenbin
name: Sun, Di
name: Li, Xiaoying
name: Shen, Wentao
Publisher: name: figshare
Year: 2021
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 1: Figure S1. Detection of viral RNA of the CsCMV-CM and CsCMV-NC in infected cassava leaves using RT-PCR. Figure S2. Silencing phenotypes in 5-month-old cassava plants induced by infection with pCsCMV-PDS487 or pCsCMV-ChlI345 at 45 dpi. Figure S3. Alignment of the cassava 487-bp PDS (GenBankaccession:XM_021757403) and 345-bp ChlI gene fragments(GenBankaccession:XM_021743433) in pCsCMV-PDS487 and pCsCMV-ChlI345 with the N.benthamiana PDS (GenBankaccession:DQ469932) and ChlI (SequenceID:Niben101Scf16898g00001.1) homologues by the Sol Genomics Network (SGN). (https://solgenomics.net/organism/Nicotiana_benthamiana/genome). Figure S4. Detection of viral RNA of the CsCMV-CM and CsCMV-NC in cassava storage roots using RT-PCR.
X-ray Reflection By Photoionized Accretion Discs
Creators: name: Ballantyne, D. R.
name: Ross, R. R.
name: Fabian, A. C.
Publisher: name: arXiv
Year: 2001
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present the results of reflection calculations that treat the relevant physics with a minimum of assumptions. The temperature and ionization structure of the top five Thomson depths of an illuminated disc are calculated while also demanding that the atmosphere is in hydrostatic equilibrium. In agreement with Nayakshin, Kazanas & Kallman, we find that there is a rapid transition from hot to cold material in the illuminated layer. However, the transition is usually not sharp so that often we find a small but finite region in Thomson depth where there is a stable temperature zone at T \sim 2 x 10^{6} K due to photoelectric heating from recombining ions. As a result, the reflection spectra often exhibit strong features from partially-ionized material, including helium-like Fe K lines and edges. We find that due to the highly ionized features in the spectra these models have difficulty correctly parameterizing the new reflection spectra. There is evidence for a spurious $R-Γ$ correlation in the ASCA energy range, where $R$ is the reflection fraction for a power-law continuum of index $Γ$, confirming the suggestion of Done & Nayakshin that at least part of the R-Gamma correlation reported by Zdziarski, Lubinski & Smith for Seyfert galaxies and X-ray binaries might be due to ionization effects. Although many of the reflection spectra show strong ionized features, these are not typically observed in most Seyfert and quasar X-ray spectra.
description: 16 pages, accepted by MNRAS, Fig. 8 is in colour Figures and tables changed by a code update. Conclusions unchanged
D 2.4 Governance and operational models
Creators: name: Nielsen Anja Fleten
name: Kokkvoll Tveit Andreas
name: Lindberg Gunnar
name: Anagnostopoulou Afroditi
name: Tromaras Alkiviadis
name: Tozzi Michele
name: Angelopoulos Nikolaos
Publisher: name: Zenodo
Year: 2020
Subjects: Be open
Transport
Transport research
Open science
Open access
Project

description: This deliverable studies the variety of Open Science activities done in different countries to find the main barriers and suggest best practice methods for EOSC and the transport research community working with open science. The activities were accomplished through interviews and desk research. Interviews with different stakeholders (government, funders, data owners) and document studies where done in Norway, Belgium and Greece, and also interviews with some of the main transport research organisations in Europe were included to get their perspective on Open Science as well.
description: {"references": ["Nielsen Anja Fleten, Kokkvoll Tveit Andreas, Lindberg Gunnar, Anagnostopoulou Afroditi, Tromaras Alkiviadis, Tozzi Michele & Angelopoulos Nikolaos. (2020). D2.4 Governance and operational models. Zenodo."]}
Additional file 2 of NCK1-AS1 promotes the progression of melanoma by accelerating cell proliferation and migration via targeting miR-526b-5p/ADAM15 axis
Creators: name: Lin, Quan
name: Jia, Yan
name: Zhang, Duo
name: Jin, Hongjuan
Publisher: name: figshare
Year: 2021
Subjects: subject: Biophysics
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Pharmacology
subject: Immunology
subject: FOS: Clinical medicine
subject: Biological Sciences not elsewhere classified
subject: Developmental Biology
subject: Cancer
subject: Hematology

description: Additional file 2: Table S1. Primer sequences used in RT-qPCR.
Lepanomus crinalis subsp. zuluensis Wanat 2021, ssp. n.
Creators: name: Wanat, Marek
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Brentidae
Lepanomus
Lepanomus crinalis
Lepanomus crinalis zuluensis

description: Lepanomus crinalis zuluensis ssp. n.
(Figs. 187–189, 191, 193, 195–212, 215–227, 294)
 Type material. Holotype ♂: a) RSA (NE) KwaZulu-Natal /- 27.3308S / 32.7468E / Mabibi Camp 50 m / ex Apodytes dimidiata / 4.12.2012 leg. M. Wanat (TMSA) [dissected, genitalia in glycerol in the microvial pinned under specimen]. Paratypes (4 ♂ 7 ♀): same data as in the holotype, 3 ♂ 5 ♀ (TMSA, MWC). KwaZulu-Natal: Sodwana Bay, 27.32S 32.40E [-27.5333 / 32.6667], 8- 10.11.1984, 1 ♀, 22.12.1991, 1 ♀ —leg. R. Oberprieler (MWC, SANC); Mtubatuba-Dukuduku, 17- 21.12.1997, 1 ♂, leg. I. Jeniš (MWC).
 Diagnosis. Distinct from the nominotypical subspecies in just two subtle external characters: Rostrum in both sexes is more robust and in dorsal view prorostrum is subparallel-sided, measured in mid-length in ♂ 0.95 ×, in ♀ 0.90 × as broad as metarostrum (Figs. 189, 191); the third elytral interval does not form an elongate rib-like elevation as in L. c. crinalis, being not more convex than neighbouring intervals (Fig. 193).
 Other external and internal characters of the new subspecies zuluensis do not differ from those listed above in the genus description, except perhaps the shape of the spermatheca having a slightly larger corpus (Fig. 227). However, the variation of the spermatheca was not thoroughly analysed during this study.
 Biology. Like the nominotypical subspecies, the specimens of L. c. zuluensis were beaten from the flowering old tree of Apodytes dimidiata in the Mabibi Camp.
 Distribution. Eastern R.S.A. (KwaZulu-Natal) (Fig. 294).
 Etymology. Named after the Zululand, historical fatherland of the Zulu people inhabiting the type area of the new subspecies.
 Remarks. Balfour-Browne (1945) noticed and commented on the variation of Lepanomus crinalis, but he finally classified it as infraspecific, concerning mainly pronotal punctuation and coloration of elytra. In his original description of L. crinalis he designated the type locality as Port St. Johns in Pondoland and mentioned the presence of ‘costiform elevation of the 3 rd interstria at the beginning of declivous part of elytra’, thus unambiguosly identifying the nominotypical subspecies. Actual ranges of the two subspecies of L. crinalis in South Africa should be investigated, like the taxonomic status of the specimens from Tanzania, which were not examined by me for the purpose of the present paper.
description: Published as part of Wanat, Marek, 2021, New basal taxa of South African Apioninae (Coleoptera: Curculionoidea: Brentidae), pp. 1-60 in Zootaxa 5035 (1) on page 38, DOI: 10.11646/zootaxa.5035.1.1, http://zenodo.org/record/5499024
First detection of the pre-biotic molecule glycolonitrile (HOCH2CN) in the interstellar medium
Creators: name: Zeng, S.
name: Quénard, D.
name: Jiménez-Serra, I.
name: Martín-Pintado, J.
name: Rivilla, V. M.
name: Testi, L.
name: Martín-Doménech, R.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Theories of a pre-RNA world suggest that glycolonitrile (HOCH$_2$CN) is a key species in the process of ribonucleotide assembly, which is considered as a molecular precursor of nucleic acids. In this Letter, we report the first detection of this pre-biotic molecule in the interstellar medium (ISM) by using ALMA data obtained at frequencies between 86.5$\,$GHz and 266.5$\,$GHz toward the Solar-type protostar IRAS16293-2422 B. A total of 15 unblended transitions of HOCH$_2$CN were identified. Our analysis indicates the presence of a cold (T$\rm _{ex}$=24$\pm$8$\,$K) and a warm (T$\rm _{ex}$=158$\pm$38$\,$K) component meaning that this molecule is present in both the inner hot corino and the outer cold envelope of IRAS16293 B. The relative abundance with respect to H$_2$ is (6.5$\pm$0.6)$\times$10$^{-11}$ and $\geq$(6$\pm$2)$\times$10$^{-10}$ for the warm and cold components respectively. Our chemical modelling seems to underproduce the observed abundance for both the warm and cold component under various values of the cosmic-ray ionisation rate ($ζ$). Key gas phase routes for the formation of this molecule might be missing in our chemical network.
description: 5 pages, 4 figures, 2 tables, accepted in Monthly Notices of the Royal Astronomical Society Letters
Effects of carrier concentration on the superfluid density of high-T_c cuprates
Creators: name: Panagopoulos, C.
name: Rainford, B. D.
name: Cooper, J. R.
name: Lo, W.
name: Tallon, J. L.
name: Loram, J. W.
name: Betouras, J.
name: Wang, Y. S.
name: Chu, C. W.
Publisher: name: arXiv
Year: 1999
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: The absolute values and temperature, T, dependence of the in-plane magnetic penetration depth, $λ_{ab}$, of La_{2-x}Sr_xCuO_4 and HgBa_2CuO_{4+δ} have been measured as a function of carrier concentration. We find that the superfluid density, $ρ_s$, changes substantially and systematically with doping. The values of $ρ_{s}(0)$ are closely linked to the available low energy spectral weight as determined by the electronic entropy just above T_c and the initial slope of $ρ_{s}(T)/ρ_{s}(0)$ increases rapidly with carrier concentration. The results are discussed in the context of a possible relationship between $ρ_s$ and the normal-state (or pseudo) energy gap.
description: 4 pages and 5 figures, submitted to Phys. Rev. Lett
Additional file 1: of Family involvement in managing medications of older patients across transitions of care: a systematic review
Creators: name: Manias, Elizabeth
name: Bucknall, Tracey
name: Hughes, Carmel
name: Jorm, Christine
name: Woodward-Kron, Robyn
Publisher: name: figshare
Year: 2019
Subjects: subject: Medicine
subject: Sociology
subject: FOS: Sociology
subject: 80699 Information Systems not elsewhere classified
subject: FOS: Computer and information sciences
subject: 110309 Infectious Diseases
subject: FOS: Health sciences

description: Search History/Alerts Medline (Ebscohost) [9]. Search history for Medline. (DOCX 54 kb)
Microscopic control and detection of ultracold strontium in optical-tweezer arrays
Creators: name: Norcia, M. A.
name: Young, A. W.
name: Kaufman, A. M.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Quantum Gases (cond-mat.quant-gas)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We demonstrate a set of tools for microscopic control of neutral strontium atoms. We report single-atom loading into an array of sub-wavelength scale optical tweezers, light-shift free control of a narrow-linewidth optical transition, three-dimensional ground-state cooling, and high-fidelity nondestructive imaging of single atoms on sub-wavelength spatial scales. Extending the microscopic control currently achievable in single-valence-electron atoms to species with more complex internal structure, like strontium, unlocks a wealth of opportunities in quantum information science, including tweezer-based metrology, new quantum computing architectures, and new paths to low-entropy many-body physics.
Effect of Rope Hadronisation on Strangeness Enhancement in p$-$p collisions at LHC energies
Creators: name: Nayak, Ranjit
name: Pal, Subhadip
name: Dash, Sadhana
Publisher: name: arXiv
Year: 2018
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The p$-$p collisions at high multiplicity at LHC show small scale collective effects similar to that observed in heavy ion collisions such as enhanced production of strange and multi-strange hadrons, long range azimuthal correlations, etc. The observation of strangeness enhancement in p$-$p collisions at at $\sqrt{s}$ = 7 TeV and 13 TeV as measured by ALICE experiment is explored using Pythia8 event generator within the framework of microscopic rope hadronization model which assumes the formation of ropes due to overlapping of strings in high multiplicity environment. The transverse momentum ($p_{T}$) spectra shape and its hardening with multiplicity is well described by the model. The mechanism of formation of ropes also described the observed experimental strangeness enhancement for higher multiplicity classes in p$-$p collisions at 7 TeV and 13 TeV. The enhancement with multiplicity is further investigated by studying the mean $p_{T}$ ($$) and the integrated yields ($$ ) of strange and multi-strange hadrons and comparing the predictions to the measured data at LHC for 7 TeV and 13 TeV.
Reversible to Irreversible Transitions in Periodically Driven Skyrmion Systems
Creators: name: Brown, B. L.
name: Reichhardt, C.
name: Reichhardt, C. J. O.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We examine skyrmions driven periodically over random quenched disorder and show that there is a transition from reversible motion to a state in which the skyrmion trajectories are chaotic or irreversible. We find that the characteristic time required for the system to organize into a steady reversible or irreversible state exhibits a power law divergence near a critical ac drive period, with the same exponent as that observed for reversible to irreversible transitions in periodically sheared colloidal systems, suggesting that the transition can be described as an absorbing phase transition in the directed percolation universality class. We compare our results to the behavior of an overdamped system and show that the Magnus term enhances the irreversible behavior by increasing the number of dynamically accessible orbits. We discuss the implications of this work for skyrmion applications involving the long time repeatable dynamics of dense skyrmion arrays.
description: 7 pages, 6 figures
The Isotropy of Compact Universes
Creators: name: Barrow, John D.
name: Kodama, Hideo
Publisher: name: arXiv
Year: 2000
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We discuss the problem of the stability of the isotropy of the universe in the space of ever-expanding spatially homogeneous universes with a compact spatial topology. The anisotropic modes which prevent isotropy being asymptotically stable in Bianchi-type $VII_h$ universes with non-compact topologies are excluded by topological compactness. Bianchi type $V$ and type $VII_h$ universes with compact topologies must be exactly isotropic. In the flat case we calculate the dynamical degrees of freedom of Bianchi-type $I$ and $VII_0$ universes with compact 3-spaces and show that type $VII_0$ solutions are more general than type $I$ solutions for systems with perfect fluid, although the type $I$ models are more general than type $VII_0$ in the vacuum case. For particular topologies the 4-velocity of any perfect fluid is required to be non-tilted. Various consequences for the problems of the isotropy, homogeneity, and flatness of the universe are discussed.
description: 22 pages in LaTeX2e with the amsmath package
Pégase.3: A code for modeling the UV-to-IR/submm spectral and chemical evolution of galaxies with dust
Creators: name: Fioc, Michel
name: Rocca-Volmerange, Brigitte
Publisher: name: arXiv
Year: 2019
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: A code computing consistently the evolution of stars, gas and dust, as well as the energy they radiate, is required to derive reliably the history of galaxies by fitting synthetic SEDs to multiwavelength observations. The new code Pégase.3 described in this paper extends to the far-IR/submm the UV-to-near-IR modeling provided by previous versions of Pégase. It first computes the properties of single stellar populations at various metallicities. It then follows the evolution of the stellar light of a galaxy and the abundances of the main metals in the ISM, assuming some scenario of mass assembly and star formation. It simultaneously calculates the masses of the various grain families, the optical depth of the galaxy and the attenuation of the SED through the diffuse ISM in spiral and spheroidal galaxies, using grids of radiative transfer precomputed with Monte Carlo simulations taking scattering into account. The code determines the mean radiation field and the temperature probability distribution of stochastically heated individual grains. It then sums up their spectra to yield the overall emission by dust in the diffuse ISM. The nebular emission of the galaxy is also computed, and a simple modeling of the effects of dust on the SED of star-forming regions is implemented. The main outputs are UV-to-submm SEDs of galaxies from their birth up to 20 Gyr, colors, masses of galactic components, ISM abundances of metallic elements and dust species, supernova rates. The temperatures and spectra of individual grains are also available. The paper discusses several of these outputs for a scenario representative of Milky Way-like spirals. Pégase.3 is fully documented and its Fortran 95 source files are public. The code should be especially useful for cosmological simulations and to interpret future mid- and far-IR data, whether obtained by JWST, LSST, Euclid or e-ELT.
description: 15 pages. In press in A&A. Source files of the code available at http://www.iap.fr/users/fioc/Pegase/Pegase.3/ (and http://www.iap.fr/pegase/); documentation at arXiv:1902.02198
MOESM1 of Unexpected insertion of carrier DNA sequences into the fission yeast genome during CRISPR–Cas9 mediated gene deletion
Creators: name: Longmuir, Sophie
name: Akhtar, Nabihah
name: MacNeill, Stuart
Publisher: name: figshare
Year: 2019
Subjects: subject: Biochemistry
subject: Space Science
subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Genetics
subject: Molecular Biology
subject: Pharmacology
subject: Evolutionary Biology
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: 110309 Infectious Diseases
subject: FOS: Health sciences

description: Additional file 1: Tables S1–S6. Yeast strains (Table S1), oligonucleotides (Table S2), plasmids (Table S3), homologous recombination templates (Table S4), phenotypic screening conditions (Table S5) and details of sequence insertions (Table S6).
Non-linear response and electron-electron interactions in mesoscopic metal rings
Creators: name: Kopietz, Peter
name: Voelker, Axel
Publisher: name: arXiv
Year: 1997
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: A time-dependent electric field gives rise to a stationary non-equilibrium current I^{(2)} around a mesoscopic metal ring threaded by a magnetic flux. We show that this current, which is proportional to the intensity of the field, is closely related to the exchange part of the interaction contribution to the equilibrium persistent current, and that the corresponding non-linear conductivity directly measures the weak localization correction to the polarization. We explicitly calculate the disorder average of I^{(2)} in the diffusive regime as function of the frequency of the electric field and the static flux piercing the ring, and suggest an experiment to test our theory.
description: RevTex, 6 figures, accepted for publication in European Physical Journal B
An Investigation on Partitions with Equal Products
Creators: name: Cha, Byungchul
name: Claman, Adam
name: Harrington, Joshua
name: Liu, Ziyu
name: Maldonado, Barbara
name: Miller, Alexander
name: Palma, Ann
name: Wong, Tony W. H.
name: Yi, Hongkwon V.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Number Theory (math.NT)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 05A17, 11B75, 11B83

description: An ordered triple $(s,p,n)$ is called admissible if there exist two different multisets $X=\{x_1,x_2,\dotsc,x_n\}$ and $Y=\{y_1,y_2,\dotsc,y_n\}$ such that $X$ and $Y$ share the same sum $s$, the same product $p$, and the same size $n$. We first count the number of $n$ such that $(s,p,n)$ are admissible for a fixed $s$. We also fully characterize the values $p$ such that $(s,p,n)$ is admissible. Finally, we consider the situation where $r$ different multisets are needed, instead of just two. This project is also related to John Conway's wizard puzzle from the 1960s.
description: Research Experiences for Undergraduates at Muhlenberg College
High Energy Large Area Surveys: from BeppoSAX to Chandra and XMM
Creators: name: Fiore, F.
name: Comastri, A.
name: La Franca, F.
name: Vignali, C.
name: Matt, G.
name: Perola, G. C.
Publisher: name: arXiv
Year: 2001
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Optical identification of hard X-ray selected BeppoSAX and Chandra sources indicates that a large fraction of the sources are ``intermediate'' AGN, i.e. type 1.8-1.9 AGN, broad-line quasars and even X-ray loud but optically dull (apparently normal) galaxies, all obscured in X-rays by columns of the order of logNH=22-23.5 cm-2. Because of this obscuring matter, these sources are more difficult to detect or select at other wavelengths, implying that a fraction of the accretion power in the Universe may have been missed so far.
description: to appear in Proc. of the ESO/ECF/STSCI workshop on "Deep Fields", Garching October 2000
Identification and analysis of miRNAs in the normal and fatty liver from the Holstein dairy cow
Creators: name: Huang, Yong
name: Zhang, Cai
name: Wang, Yanli
name: Sun, Xihong
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Biophysics
subject: Biochemistry
subject: Physical Sciences not elsewhere classified
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Chemical Sciences not elsewhere classified
subject: Biological Sciences not elsewhere classified
subject: Computational Biology

description: MicroRNAs (miRNAs) are a class of non-coding short RNAs with ∼22 nts in length, which play important roles in the regulation of numerous biological processes in animals. In this study, two small RNA libraries from fatty (S01) and normal livers (S02) from Holstein Dairy Cow (HDC) were sequenced through deep sequencing. A total of 12,964,411 and 15,426,289 clean reads were obtained, representing 370 known and 182 novel miRNAs, respectively. The characterization, expression pattern, potential functions and target genes of these miRNAs were investigated. Analysis identified 66 upregulated and seven downregulated differentially expressed miRNAs (DIE-miRNAs). To verify the sequencing results, 10 DIE-miRNAs were selected for qRT-PCR, and the results were confirmed to be consistent with the miRNA sequencing. In addition, a total of 5,578 targets of the 73 DIE-miRNAs were predicted. GO analysis revealed that DIE-miRNAs targets are associated with cellular process, cell part and molecular transducer activity. KEGG pathway analysis showed that Arrhythmogenic right ventricular cardiomyopathy, Axon guidance, Ether lipid metabolism and Cocaine addiction were closely associated with liver metabolism. These findings will provide valuable information for further functional verification of miRNAs between normal and fatty liver, as might exploit new attractive miRNAs biomarkers for diseases detection in HDC.
Low $x$ physics as an infinite twist (G)TMD framework: unravelling the origins of saturation
Creators: name: Altinoluk, Tolga
name: Boussarie, Renaud
Publisher: name: arXiv
Year: 2019
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We show how the formulations of low $x$ physics involving Wilson line operators can be fully rewritten into an infinite twist TMD or GTMD framework, respectively for inclusive and exclusive observables. This leads to a perfect match between low $x$ physics and moderate $x$ formulations of QCD in terms of GTMDs, TMDs, GPDs or PDFs. We derive the BFKL limit as a kinematic limit and argue that beyond the Wandzura-Wilczek approximation, 3-body and 4-body unintegrated PDFs should be taken into account even in this regime. Finally, we analyze how saturation should be understood as three distinct effects: saturation through non-linearities in the evolution equations at small $x$, saturation through multiple interactions with slow gluons as TMD gauge links, and saturation as the enhancement of genuine twist corrections.
description: 25 pages, 7 figures
title: Αριθμητικές Μέθοδοι για την Εύρεση Ιδιοτιμών Πίνακα
titleType: AlternativeTitle
Creators: name: Karantzia, Anna D.
Publisher: name: National Technological University of Athens
Year: 2014
Subjects: Ιδιοτιμή
Ιδιοδιάνυσμα
Μέθοδος Δυνάμεων
Αλγόριθμος
Αντίστροφη Επανάληψη
Eigenvalue
Eigenvector
QR Algorithm
Shur decomposition
Rayleigh Quotient

description: 99 σ.
description: Σκοπός της εργασίας αυτής είναι η μελέτη μεθόδων της Αριθμητικής Γραμμικής Άλγεβρας οι οποίες υπολογίζουν τις ιδιοτιμές και τα ιδιοδιανύσματα τυχαίων πινάκων. Αρχικά γίνεται αναφορά σε βασικούς ορισμούς και θεωρήματα της Γραμμικής Άλγεβρας, αναφέρεται επίσης η παραγοντοποίηση Schur, η 2-φασική προσέγγιση ιδιοτιμών και η απλοποίηση ενός πίνακα σε μορφή Hessenberg μέσω μιας ακολουθίας ορθοκανονικών μετασχηματισμών Householder. Στη συνέχεια παρουσιάζονται οι μέθοδοι των Δυνάμεων, της Αντίστροφης Επανάληψης, του Πηλίκου Rayleigh, ο "Απλός" και ο "Πρακτικός" Αλγόριθμος QR, η Μέθοδος των Ταυτοχρόνων Επαναλήψεων και οι αλγόριθμοι Jacobi, Διχοτόμησης και Διαίρει και Βασίλευε. Για τις Έξι πρώτες μεθόδους που αναφέρθηκαν δίνονται αριθμητικά παραδείγματα για την κατασκευή των οποίων δημιουργήθηκαν προγράμματα στο περιβάλλον της Matlab.
description: The purpose of this thesis is to study methods of Numerical Linear Algebra which calculate the eigenvalues and the eigenvectors of arbitary matrices. Initially referring to basic definitions and theorems of Linear Algebra, also mentions the Schur decomposition, the two-phase approach and a reduction of a full matrix to Hessenberg form by a sequence of unitary similarity transformations.We then present the Power Method, the Inverse Iteration,the Rayleigh Quotient iteration, the "Pure" and the "Practical" QR Algorithm, the Simultaneous Iteration and the algorithms of Jacobi, Bisection and the Divide and Conquer algorithm. For the first six methods, are given numerical examples for the construction of which created programs in Matlab.
Correlation between Spin Polarization and Magnetic Moment in Ferromagnetic Alloys
Creators: name: Choy, Tat-Sang
name: Chen, Jian
name: Hershfield, Selman
Publisher: name: arXiv
Year: 1999
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The correlation between the magnetic moment in ferromagnetic alloys and the tunneling spin polarization in ferromagnet-insulator-superconductor tunneling experiments has been a mystery. The measured spin polarization for Fe, Co, Ni, and various Ni alloys is positive and roughly proportional to their magnetic moments, which can not be explained by considering the net density of states. Using a tight-binding coherent potential approximation (CPA) model, we show that while the polarization of the net density of states is not correlated with the magnetic moment, the polarization of the density of states of {\it s} electrons is correlated with the magnetic moment in the same manner as observed by the tunneling experiments. We also discuss the spin polarization measurements by Andreev reflection experiments, some of which obtained different results from the tunneling experiments and our calculations.
description: 8 RevTEX pages, 9 figures in eps
Magnetism and spin-fluctuation induced superconductivity in ruthenates
Creators: name: Mazin, I. I.
name: Singh, D. J.
Publisher: name: arXiv
Year: 1997
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: This talk summarizes the results published in cond-mat/9703068 (PRL 79,733, 1997) and in cond-mat/9702168 (PR56, 2556, 1997). New results regarding c-dispersion as measered by de Haas-van Alphen, and regarding residual DOS problem, is added.
description: Talk presented at the SNS'97 Conference, Cape Cod; 1 latex file, 1 ps figure
Experiments on a jet in a crossflow in the low-velocity-ratio regime
Creators: name: Klotz, Lukasz
name: Gumowski, Konrad
name: Wesfreid, Jose Eduardo
Publisher: name: arXiv
Year: 2019
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: The hairpin instability of a jet in a crossflow (JICF) for a low jet-to-crossflow velocity ratio is investigated experimentally for a velocity ratio range of $R\in(0.14,0.75)$ and crossflow Reynolds numbers $Re_D\in(260,640)$. From spectral analysis we characterize the Strouhal number and amplitude of the hairpin instability as a function of $R$ and $Re_D$. We demonstrate that the dynamics of the hairpins is well described by the Landau model, and, hence, that the instability occurs through Hopf bifurcation, similarly to other hydrodynamical oscillators such as wake behind different bluff bodies. Using the Landau model, we determine the precise threshold values of hairpin shedding. We also study the spatial dependence of this hydrodynamical instability, which shows a global behaviour.
description: 20 pages, 21 figures
Kiotina spatulata : Wu 1948
Creators: name: Huo, Qing-bo
name: Zhu, Bin-Qing
name: Du, Yu-Zhou
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Plecoptera
Perlidae
Kiotina
Kiotina spatulata

description: Kiotina spatulata Wu, 1948, status revised
 Kiotina spatulata: Wu 1948: 148. Holotype male: Sichuan, China.
 Illies 1966: 342 — Du et al. 1999: 64 — Stark & Sivec 2008: 162 — Murányi & Li 2016: 191 — Yang & Li 2018: 47.
 Hemacroneuria spatulata: Li et al. 2019: 354. Combination.
 Remarks: The original description and illustrations of Wu (1948) show that this species has large paraprocts and paired sensilla basiconica patches on the male 10th tergum. However, these characteristics are not unique to Hemacroneuria and also exist in the genus Sinacroneuria. In addition, Wu (1948) mentioned that K. spatulata has “ocelli two” (unfortunately, without illustration of head and pronotum), which also occurs in Kiotina or Flavoperla. Previous literature and photographs have shown that all the Hemacroneuria are triocellate. Therefore, we do not believe that spatulata belongs to Hemacroneuria. This species should be replaced in Kiotina until specimens are checked in the future.
description: Published as part of Huo, Qing-bo, Zhu, Bin-Qing & Du, Yu-Zhou, 2021, New illustrations, new species and new combination of Hemacroneuria Enderlein (Plecoptera: Perlidae) from China, pp. 563-576 in Zootaxa 5032 (4) on page 575, DOI: 10.11646/zootaxa.5032.4.6, http://zenodo.org/record/5499090
Critical Dimerization Strength of the Quarter-Filled t-J Model
Creators: name: Nishimoto, S.
name: Ohta, Y.
Publisher: name: arXiv
Year: 1998
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: An exact-diagonalization technique on small clusters is used to study the ground state of the dimerized t-J model at quarter filling. The equal-time charge and spin correlations, charge and spin gaps, and binding energy are calculated for the two-dimensional lattice with a spatial dimerization pattern corresponding to organic conductors $κ-(BEDT-TTF)_2X$. We show that competition between the effects of two types of dimerization, i.e., dimerization in the hopping integral and dimerization in the exchange interaction, leads to the insulator-superconductor transition in the ground state of the model. The phase diagram is thereby presented.
description: 4 pages with 4 gif figures. Hardcopies of figures (or the entire manuscript) can be obtained by e-mail request to ohta@science.s.chiba-u.ac.jp
3He-Rich Solar Energetic Particles from Sunspot Jets
Creators: name: Bucik, R.
name: Wiedenbeck, M. E.
name: Mason, G. M.
name: Gomez-Herrero, R.
name: Nitta, N.
name: Wang, L.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Solar sources of suprathermal (<1 MeV/nucleon) 3He-rich solar energetic particles (SEPs) have been commonly associated with jets originating in small, compact active regions at the periphery of near-equatorial coronal holes. Sources of relatively rare, high-energy (>10 MeV/nucleon) 3He-rich SEPs remain unexplored. Here we present two of the most intense 3He-rich (3He/4He>1) SEP events of the current solar cycle 24 measured on the Advanced Composition Explorer at energy >10 MeV/nucleon. Although 3He shows high intensities, Z>2 ions are below the detection threshold. The events are accompanied by type-III radio bursts, but no type-II emission as typically seen for suprathermal 3He-rich SEPs. The corresponding solar sources were analyzed using high-resolution, extreme-ultraviolet imaging and photospheric magnetic field observations on the Solar Dynamics Observatory. We find the sources of these events associated with jets originating at the boundary of large sunspots with complex beta-gamma-delta magnetic configuration. Thus, details of the underlying photospheric field apparently are important to produce 3He to high energies in the examined events.
description: 8 pages, 4 figures
Discrete Black-Hole Radiation and the Information Loss Paradox
Creators: name: Hod, Shahar
Publisher: name: arXiv
Year: 2000
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Hawking's black hole information puzzle highlights the incompatibility between our present understanding of gravity and quantum physics. However, Hawking's prediction of black-hole evaporation is at a semiclassical level. One therefore suspects some modifications of the character of the radiation when quantum properties of the {\it black hole itself} are properly taken into account. In fact, during the last three decades evidence has been mounting that, in a quantum theory of gravity black holes may have a discrete mass spectrum, with concomitant {\it discrete} line emission. A direct consequence of this intriguing prediction is that, compared with blackbody radiation, black-hole radiance is {\it less} entropic, and may therefore carry a significant amount of {\it information}. Using standard ideas from quantum information theory, we calculate the rate at which information can be recovered from the black-hole spectral lines. We conclude that the information that was suspected to be lost may gradually leak back, encoded into the black-hole spectral lines.
description: 12 pages
Semi-supervised and Active-learning Scenarios: Efficient Acoustic Model Refinement for a Low Resource Indian Language
Creators: name: Chellapriyadharshini, Maharajan
name: Toffy, Anoop
name: M., Srinivasa Raghavan K.
name: Ramasubramanian, V
Publisher: name: arXiv
Year: 2018
Subjects: subject: Computation and Language (cs.CL)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Sound (cs.SD)
subject: Audio and Speech Processing (eess.AS)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: We address the problem of efficient acoustic-model refinement (continuous retraining) using semi-supervised and active learning for a low resource Indian language, wherein the low resource constraints are having i) a small labeled corpus from which to train a baseline `seed' acoustic model and ii) a large training corpus without orthographic labeling or from which to perform a data selection for manual labeling at low costs. The proposed semi-supervised learning decodes the unlabeled large training corpus using the seed model and through various protocols, selects the decoded utterances with high reliability using confidence levels (that correlate to the WER of the decoded utterances) and iterative bootstrapping. The proposed active learning protocol uses confidence level based metric to select the decoded utterances from the large unlabeled corpus for further labeling. The semi-supervised learning protocols can offer a WER reduction, from a poorly trained seed model, by as much as 50% of the best WER-reduction realizable from the seed model's WER, if the large corpus were labeled and used for acoustic-model training. The active learning protocols allow that only 60% of the entire training corpus be manually labeled, to reach the same performance as the entire data.