cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Muspiceidae Brumpt
Creators: name: Santos, Cláudia Portes
name: Gibson, David I.
Publisher: name: Zenodo
Year: 2015
Subjects: Biodiversity
Taxonomy
Animalia
Nematoda
Adenophorea
Enoplida
Muspiceidae

description: Family Muspiceidae Brumpt   Lukonema Chabaud & Bain
 Species: L. lukoschusi Chabaud & Bain, 1974
description: Published as part of Santos, Cláudia Portes & Gibson, David I., 2015, Checklist of the Helminth Parasites of South American Bats, pp. 471-499 in Zootaxa 3937 (3) on page 473, DOI: 10.11646/zootaxa.3937.3.3, http://zenodo.org/record/240106
Vector Meson Dominance as the first order of a sequence of Pade Approximants
Creators: name: Sanz-Cillero, J. J.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The use of Pade Approximants for the analysis of the pion vector form-factor is discussed and justified in this talk. The method is tested first in a theoretical model and applied then on real experimental data. It is shown how the Pade Approximants provide a convenient and reliable framework to incorporate both low and high energy information in the euclidean region, leading to improved determinations of the low energy parameters such as, e.g., the quadratic radius ^pi_V.
description: 4 pages, 3 figures, espcrc2 style. To appear in the proceedings of the 14th International QCD Conference, QCD 08, 7-12 July 2008, Montpellier (France)
Plane-strain visioplasticity for dynamic and quasi-static deformation processes
Creators: name: Dwivedi, Surendra Nath
Publisher: name: University of British Columbia
Year: 2010

description: The visioplasticity approach is developed to enable the complete stress history of any steady or non-steady, quasi-static or impact, plane strain plastic deformation process to be determined from a record of the deformation pattern. The velocity field is determined experimentally and for dynamic conditions high speed photographs are taken of a grid pattern marked on the end surface of the specimen. Digitization of the instantaneous grid node positions allows the velocity fields to be obtained at predetermined time intervals throughout the transient deformation period. Hence, the strain-rate, equivalent strain rate, equivalent strain and finally stress fields can all be obtained. A three dimensional surface fitting procedure, using fourth order polynomials, is used to smooth the scalar component of the experimentally determined velocity field. The condition of continuity (Є [sub x]=- Є [sub y], for plane strain), is imposed on both surfaces thereby reducing the number of independent parameters from 30 to 10. Besides smoothing the experimental points this procedure has the distinct advantage that the polynomials can be readily differentiated for determining strain-rates and that deformation can be referred to a master reference grid that is fixed with respect to time. Plane-strain upsetting tests, conducted at a speed of 0.02 ft/min give results that agree closely with the well documented 'friction hill' type of normal stress distribution for quasi-static rates of strain. However, with the specimen deformed at a speed of 15.7 ft/sec the normal stress distribution is radically different exhibiting a saddle type distribution. The effect of strain rate on the interface and body stresses will have significant bearing on a number of metal forming operations.
TiO and VO broad band absorption features in the optical spectrum of the atmosphere of the hot-Jupiter HD209458b
Creators: name: Desert, J. -M.
name: Vidal-Madjar, A.
name: Etangs, A. Lecavelier des
name: Sing, D.
name: Ehrenreich, D.
name: Hebrard, G.
name: Ferlet, R.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The presence of titanium oxide (TiO) and vanadium oxide (VO) gas phase species is searched for in the atmosphere of the hot Jupiter HD209458b. We compared a model for the planets transmitted spectrum to multi-wavelength eclipse-depth measurements (from 3000 to 10000 Angstrom), obtained by Sing et al. (2008a) using archived HST-STIS time series spectra. We make use of these observations to search for spectral signatures from extra absorbers in the planet atmosphere between 6000 and 8000 Angstrom. Along with sodium depletion and Rayleigh scattering recently published for this exoplanet atmosphere, an extra absorber of uncertain origin, redward of the sodium lines, resides in the atmosphere of the planet. Furthermore, this planet has a stratosphere experiencing a thermal inversion caused by the capture of optical stellar flux by absorbers that resides at altitude. Recent models have predicted that the presence of TiO and VO in the atmosphere of HD209458b may be responsible for this temperature inversion. Although no specific TiO and VO spectral band head signatures have been identified unambiguously in the observed spectrum, we suggest here that the opacities of those molecules are possible candidates to explain the remaining continuous broad band absorption observed between 6200 and 8000 Angstrom. To match reasonably well the data, the abundances of TiO and VO molecules are evaluated from ten to one thousand times below solar. This upper limit result is in agreement with expected variations with altitude due to depletion effects such as condensation.
description: 9 pages, 4 figures. Accepted for publication in Astronomy & Astrophysics
StarGAN-ZSVC: Towards Zero-Shot Voice Conversion in Low-Resource Contexts
Creators: name: Baas, Matthew
name: Kamper, Herman
Publisher: name: arXiv
Year: 2021
Subjects: subject: Audio and Speech Processing (eess.AS)
subject: Computation and Language (cs.CL)
subject: Sound (cs.SD)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: Voice conversion is the task of converting a spoken utterance from a source speaker so that it appears to be said by a different target speaker while retaining the linguistic content of the utterance. Recent advances have led to major improvements in the quality of voice conversion systems. However, to be useful in a wider range of contexts, voice conversion systems would need to be (i) trainable without access to parallel data, (ii) work in a zero-shot setting where both the source and target speakers are unseen during training, and (iii) run in real time or faster. Recent techniques fulfil one or two of these requirements, but not all three. This paper extends recent voice conversion models based on generative adversarial networks (GANs), to satisfy all three of these conditions. We specifically extend the recent StarGAN-VC model by conditioning it on a speaker embedding (from a potentially unseen speaker). This allows the model to be used in a zero-shot setting, and we therefore call it StarGAN-ZSVC. We compare StarGAN-ZSVC against other voice conversion techniques in a low-resource setting using a small 9-minute training set. Compared to AutoVC -- another recent neural zero-shot approach -- we observe that StarGAN-ZSVC gives small improvements in the zero-shot setting, showing that real-time zero-shot voice conversion is possible even for a model trained on very little data. Further work is required to see whether scaling up StarGAN-ZSVC will also improve zero-shot voice conversion quality in high-resource contexts.
description: 16 pages, 3 figures. Published in Springer Communications in Computer and Information Science, Artificial Intelligence Research (SACAIR 2021), vol. 1342, pp. 69-84, 2020
Frame-dragging and the kinematics of Galactic-Center stars
Creators: name: Kannan, Rahul
name: Saha, Prasenjit
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We calculate the effects of frame dragging on the Galactic-Center stars. Assuming the stars are only slightly relativistic, we derive an approximation to the Kerr metric, which turns out to be a weak field Schwarzschild metric plus a frame dragging term. By numerically integrating the resulting geodesic equations, we compute the effect on keplerian elements and the kinematics. We find that the kinematic effect at pericenter passage is proportional to (a(1-e^2))^{-2}. For known Galactic-center stars it is of order 10 m/s. If observed this would provide a measurement of the spin of the black hole.
description: To appear in ApJ
Dynamic polarization of electron spins in indirect band gap (In,Al)As/AlAs quantum dots in weak magnetic field: experiment and theory
Creators: name: Shamirzaev, T. S.
name: Shumilin, A. V.
name: Smirnov, D. S.
name: Rautert, J.
name: Yakovlev, D. R.
name: Bayer, M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: A novel spin orientation mechanism - dynamic electron spin polarization has been recently suggested in Phys. Rev. Lett. $\mathbf{125}$, 156801 (2020). It takes place for unpolarized optical excitation in weak magnetic fields of the order of a few millitesla. In this paper we demonstrate experimentally and theoretically that the dynamic electron spin polarization degree changes sign as a function of time, strength of the applied magnetic field and its direction. The studies are performed on indirect band-gap (In,Al)As/AlAs quantum dots and their results are explained in the framework of a theoretical model developed for our experimental setting.
description: 14 pages, 16 figures
PEDAGOGICAL SKILLS: LEVERAGING DIGITAL TECHNOLOGIES FOR ENHANCED TEACHING EFFICIENCY
Creators: name: Nazirova, Dilfuza
Publisher: name: Zenodo
Year: 2023

description: In the rapidly evolving world of education, digital technologies have become integral tools for teachers to enhance their pedagogical skills and improve teaching efficiency. This article aims to explore the significance of integrating digital technologies into lessons and how they can empower primary school teachers to create engaging learning environments. We will discuss various pedagogical skills that can be enhanced through the effective use of digital technologies, including personalized instruction, collaborative learning, and formative assessment. Furthermore, we will present practical strategies and examples to support primary school teachers in their journey towards harnessing the potential of digital technologies for effective teaching.
Semi-Supervised Siamese Network for Identifying Bad Data in Medical Imaging Datasets
Creators: name: Belton, Niamh
name: Lawlor, Aonghus
name: Curran, Kathleen M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Noisy data present in medical imaging datasets can often aid the development of robust models that are equipped to handle real-world data. However, if the bad data contains insufficient anatomical information, it can have a severe negative effect on the model's performance. We propose a novel methodology using a semi-supervised Siamese network to identify bad data. This method requires only a small pool of 'reference' medical images to be reviewed by a non-expert human to ensure the major anatomical structures are present in the Field of View. The model trains on this reference set and identifies bad data by using the Siamese network to compute the distance between the reference set and all other medical images in the dataset. This methodology achieves an Area Under the Curve (AUC) of 0.989 for identifying bad data. Code will be available at https://git.io/JYFuV.
The relativistic Pythagorean three-body problem
Creators: name: Boekholt, Tjarda C. N.
name: Moerman, Arend
name: Zwart, Simon F. Portegies
Publisher: name: arXiv
Year: 2021
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We study the influence of relativity on the chaotic properties and dynamical outcomes of an unstable triple system; the Pythagorean three-body problem. To this end, we extend the Brutus N-body code to include Post-Newtonian pairwise terms up to 2.5 order, and the first order Taylor expansion to the Einstein-Infeld-Hoffmann equations of motion. The degree to which our system is relativistic depends on the scaling of the total mass (the unit size was 1 parsec). Using the Brutus method of convergence, we test for time-reversibility in the conservative regime, and demonstrate that we are able to obtain definitive solutions to the relativistic three-body problem. It is also confirmed that the minimal required numerical accuracy for a successful time-reversibility test correlates with the amplification factor of an initial perturbation. When we take into account dissipative effects through gravitational wave emission, we find that the duration of the resonance, and the amount of exponential growth of small perturbations depend on the mass scaling. For a unit mass <= 10 MSun, the system behavior is indistinguishable from the Newtonian case, and the resonance always ends in a binary and one escaping body. For a mass scaling up to 1e7 MSun, relativity gradually becomes more prominent, but the majority of the systems still dissolve. The first mergers start to appear for a mass of ~1e5 MSun, and between 1e7 MSun and 1e9 MSun all systems end prematurely in a merger. These mergers are preceded by a gravitational wave driven in-spiral. For a mass scaling >= 1e9 MSun, all systems result in a gravitational wave merger upon the first close encounter. Relativistic three-body encounters thus provide an efficient pathway for resolving the final parsec problem. The onset of mergers at the characteristic mass scale of 1e7 MSun potentially leaves an imprint in the mass function of supermassive black holes.
description: Accepted by Phys Rev D. 10 pages, 6 figures
Stochastic equations with delay: optimal control via BSDEs and regular solutions of Hamilton-Jacobi-Bellman equations
Creators: name: Fuhrman, Marco
name: Masiero, Federica
name: Tessitore, Gianmario
Publisher: name: arXiv
Year: 2008
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics

description: We consider an Ito stochastic differential equation with delay, driven by brownian motion, whose solution, by an appropriate reformulation, defines a Markov process $X$ with values in a space of continuous functions $\mathbf C$, with generator $\mathcal L$. We then consider a backward stochastic differential equation depending on $X$, with unknown processes $(Y,Z)$, and we study properties of the resulting system, in particular we identify the process $Z$ as a deterministic functional of $X$. We next prove that the forward-backward system provides a suitable solution to a class of parabolic partial differential equations on the space $\mathbf C$ driven by $\mathcal L$, and we apply this result to prove a characterization of the fair price and the hedging strategy for a financial market with memory effects. We also include applications to optimal stochastic control of differential equation with delay: in particular we characterize optimal controls as feedback laws in terms the process $X$.
Modeling the color evolution of luminous red galaxies - improvements with empirical stellar spectra
Creators: name: Maraston, Claudia
name: Stromback, Gustav
name: Thomas, Daniel
name: Wake, David A.
name: Nichol, Robert C.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Predicting the colors of Luminous Red Galaxies (LRGs) in the Sloan Digital Sky Survey (SDSS) has been a long-standing problem. The g,r,i colors of LRGs are inconsistent with stellar population models over the redshift range 0.1
description: Submitted to ApJ Letters. High resolution version available at http://www.maraston.eu/Maraston_etal_2008.pdf
Full-stack Comparison of Channel Models for Networks Above 100 GHz in an Indoor Scenario
Creators: name: Gargari, Amir Ashtari
name: Polese, Michele
name: Zorzi, Michele
Publisher: name: arXiv
Year: 2021
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: Signal Processing (eess.SP)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: The Sixth Generation (6G) of mobile networks is expected to use carrier frequencies in the spectrum above 100 GHz, to satisfy the demands for higher data rates and bandwidth of future digital applications. The development of networking solutions at such high frequencies is challenged by the harsh propagation environment, and by the need for directional communications and signal processing at high data rates. A fundamental step in defining and developing wireless networks above 100 GHz is given by an accurate performance evaluation. For simulations, this strongly depends on the accuracy of the modeling of the channel and of the interaction with the higher layers of the stack. This paper introduces the implementation of two recently proposed channel models (based on ray tracing and on a fully stochastic model) for the 140 GHz band for the ns-3 TeraSim module, which enables simulation of macro wireless networks in the sub-terahertz and terahertz spectrum. We also compare the two channel models with full-stack simulations in an indoor scenario, highlighting differences and similarities in how they interact with the protocol stack and antenna model of TeraSim.
description: Amir Ashtari Gargari, Michele Polese, Michele Zorzi. 2022. Full-stack Comparison of Channel Models for Networks Above 100 GHz in an Indoor Scenario. In 5th ACM Workshop on Millimeter-Wave and Terahertz Networks and Sensing Systems (mmNets '21), January 31-February 4, 2022, New Orleans, LA, USA. ACM, New York, NY, USA, 6 pages
Toward Efficient Interactions between Python and Native Libraries
Creators: name: Tan, Jialiang
name: Chen, Yu
name: Liu, Zhenming
name: Ren, Bin
name: Song, Shuaiwen Leon
name: Shen, Xipeng
name: Liu, Xu
Publisher: name: arXiv
Year: 2021
Subjects: subject: Programming Languages (cs.PL)
subject: Performance (cs.PF)
subject: FOS: Computer and information sciences

description: Python has become a popular programming language because of its excellent programmability. Many modern software packages utilize Python for high-level algorithm design and depend on native libraries written in C/C++/Fortran for efficient computation kernels. Interaction between Python code and native libraries introduces performance losses because of the abstraction lying on the boundary of Python and native libraries. On the one side, Python code, typically run with interpretation, is disjoint from its execution behavior. On the other side, native libraries do not include program semantics to understand algorithm defects. To understand the interaction inefficiencies, we extensively study a large collection of Python software packages and categorize them according to the root causes of inefficiencies. We extract two inefficiency patterns that are common in interaction inefficiencies. Based on these patterns, we develop PieProf, a lightweight profiler, to pinpoint interaction inefficiencies in Python applications. The principle of PieProf is to measure the inefficiencies in the native execution and associate inefficiencies with high-level Python code to provide a holistic view. Guided by PieProf, we optimize 17 real-world applications, yielding speedups up to 6.3$\times$ on application level.
description: In Proceedings of the 29th ACM Joint European Software Engineering Conference and Symposium on the Foundations of Software Engineering (ESEC/FSE 2021), August 23-27, 2021, Athens, Greece. ACM, New York,NY, USA, 12 pages
Halo Occupation Distribution Modeling of Clustering of Luminous Red Galaxies
Creators: name: Zheng, Zheng
name: Zehavi, Idit
name: Eisenstein, Daniel J.
name: Weinberg, David H.
name: Jing, Y. P.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We perform Halo Occupation Distribution (HOD) modeling to interpret small-scale and intermediate-scale clustering of 35,000 luminous early-type galaxies and their cross-correlation with a reference imaging sample of normal L* galaxies in the Sloan Digital Sky Survey. The modeling results show that most of these luminous red galaxies (LRGs) are central galaxies residing in massive halos of typical mass M ~ a few times 10^13 to 10^14 Msun/h, while a few percent of them have to be satellites within halos in order to produce the strong auto-correlations exhibited on smaller scales. The mean luminosity Lc of central LRGs increases with the host halo mass, with a rough scaling relation of Lc \propto M^0.5. The halo mass required to host on average one satellite LRG above a luminosity threshold is found to be about 10 times higher than that required to host a central LRG above the same threshold. We find that in massive halos the distribution of L* galaxies roughly follows that of the dark matter and their mean occupation number scales with halo mass as M^1.5. The HOD modeling results also allows for an intuitive understanding of the scale-dependent luminosity dependence of the cross-correlation between LRGs and L_* galaxies. Constraints on the LRG HOD provide tests to models of formation and evolution of massive galaxies, and they are also useful for cosmological parameter investigations. In one of the appendices, we provide LRG HOD parameters with dependence on cosmology inferred from modeling the two-point auto-correlation functions of LRGs.
description: 21 pages, 10 figures, accepted for publication in ApJ
Physics at BES-III
Creators: name: Asner, D. M.
name: Barnes, T.
name: Bian, J. M.
name: Bigi, I. I.
name: Brambilla, N.
name: Boyko, I. R.
name: Bytev, V.
name: Chao, K. T.
name: Charles, J.
name: Chen, H. X.
name: Chen, J. C.
name: Chen, Y.
name: Chen, Y. Q.
name: Cheng, H. Y.
name: Dedovich, D.
name: Descotes-Genon, S.
name: Fu, C. D.
name: Tormo, X. Garcia i
name: Gao, Y. -N.
name: He, K. L.
name: He, Z. G.
name: Hu, J. F.
name: Hu, H. M.
name: Huang, B.
name: Jia, Y.
name: Jin, H. -Y.
name: Jin, S.
name: Kuang, Y. P.
name: Lacker, H.
name: Li, H. B.
name: Li, J. L.
name: Li, W. D.
name: Li, X. Y.
name: Liu, B. J.
name: Liu, H. H.
name: Liu, J.
name: Ma, H. L.
name: Ma, J. P.
name: Mao, Y. J.
name: Mo, X. H.
name: Olsen, S. L.
name: Pich, A.
name: Pineda, A.
name: Ping, R. G.
name: Qiao, C. F.
name: Qin, G.
name: Qin, H.
name: Roney, J. M.
name: Rong, G.
name: Roos, L.
name: Shen, X. Y.
name: Soto, J.
name: Stahl, A.
name: Sun, S. S.
name: T'Jampens, S.
name: Vairo, A.
name: Wang, P.
name: Wang, Y. F.
name: Wang, Y. K.
name: Wu, N.
name: Wu, Y. L.
name: Xing, Z. Z.
name: Xu, G. F.
name: Xu, M.
name: Yang, M.
name: Yang, M. Z.
name: Yang, Y. D.
name: Yuan, C. Z.
name: Zhang, D. H.
name: Zhang, D. Y.
name: Zhang, J. Y.
name: Zhang, Z. X.
name: Zhang, X. M.
name: Zhang, X. Y.
name: Zhang, Y. J.
name: Zhao, Q.
name: Zhemchugov, A.
name: Zheng, H. Q.
name: Zheng, Y. H.
name: Zhong, M.
name: Zhu, S. -L.
name: Zhu, Y. S.
name: Zhuravlov, V.
name: Zou, B. S.
name: Zou, J. H.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: This physics book provides detailed discussions on important topics in $τ$-charm physics that will be explored during the next few years at \bes3 . Both theoretical and experimental issues are covered, including extensive reviews of recent theoretical developments and experimental techniques. Among the subjects covered are: innovations in Partial Wave Analysis (PWA), theoretical and experimental techniques for Dalitz-plot analyses, analysis tools to extract absolute branching fractions and measurements of decay constants, form factors, and CP-violation and \DzDzb-oscillation parameters. Programs of QCD studies and near-threshold tau-lepton physics measurements are also discussed.
description: Edited by Kuang-Ta Chao and Yi-Fang Wang
Physalopteridae Railliet
Creators: name: Santos, Cláudia Portes
name: Gibson, David I.
Publisher: name: Zenodo
Year: 2015
Subjects: Biodiversity
Taxonomy
Animalia
Nematoda
Secernentea
Spirurida
Physalopteridae

description: Family Physalopteridae Railliet   Physaloptera Rudolphi
 Species: Physaloptera sp. (juv.)
description: Published as part of Santos, Cláudia Portes & Gibson, David I., 2015, Checklist of the Helminth Parasites of South American Bats, pp. 471-499 in Zootaxa 3937 (3) on page 473, DOI: 10.11646/zootaxa.3937.3.3, http://zenodo.org/record/240106
Historisch- anthropologische Spurensuche.
Creators: name: Tamm, Beatrice
Publisher: name: Humboldt-Universität zu Berlin
Year: 2021
Subjects: subject: Anthropologie
subject: Provenienzforschung
subject: Human Remains
subject: 301 Soziologie, Anthropologie

description: Ziel meiner Forschung ist die Provenienzanalyse der außereuropäischen Schädelsammlung des Instituts für Anatomie der Universitätsmedizin Rostock. Dabei geht es in erster Linie um die Untersuchung des Herkunftskontextes, die Geschichte der Entstehung sowie die weitere Sammlungshistorie des anthropologischen Sammlungsteils. Von besonderer Bedeutung ist in diesem Kontext eine genaue Spurensuche an den Objekten selbst, da sie einen Einblick in die Geschichte der Stücke sowie deren Herkunft geben kann. Diese Spurensuche reicht dabei von den sachlichen anthropologischen Spuren wie Alter und Geschlecht über kulturanthropologische und kulturtechnische Spuren, die eine Bearbeitung der Objekte im wissenschaftlichen Feld zeigen, bis zu den wissenschaftsgeschichtlichen Spuren, die unter anderem anhand von schriftlichen Quellen einen Einblick in die Sammlungshistorie bieten. Im Beitrag stelle ich mein Vorgehen im Rahmen meiner bis jetzt erfolgten Spurensuche am anthropologischen Teil der Schädelsammlung und die daraus hervorgegangenen Ergebnisse vor. Er versteht sich als Teil meiner Dissertation und dient als anthropologische Erstbetrachtung der Sammlung. Zudem bilden die erarbeiteten Ergebnisse eine Grundlage für den von mir erstellten Schädelkatalog.
Graph Embedding via Diffusion-Wavelets-Based Node Feature Distribution Characterization
Creators: name: Wang, Lili
name: Huang, Chenghan
name: Ma, Weicheng
name: Cao, Xinyuan
name: Vosoughi, Soroush
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (cs.LG)
subject: Artificial Intelligence (cs.AI)
subject: Social and Information Networks (cs.SI)
subject: FOS: Computer and information sciences

description: Recent years have seen a rise in the development of representational learning methods for graph data. Most of these methods, however, focus on node-level representation learning at various scales (e.g., microscopic, mesoscopic, and macroscopic node embedding). In comparison, methods for representation learning on whole graphs are currently relatively sparse. In this paper, we propose a novel unsupervised whole graph embedding method. Our method uses spectral graph wavelets to capture topological similarities on each k-hop sub-graph between nodes and uses them to learn embeddings for the whole graph. We evaluate our method against 12 well-known baselines on 4 real-world datasets and show that our method achieves the best performance across all experiments, outperforming the current state-of-the-art by a considerable margin.
description: In CIKM 2021
SAtlas: Spherical Versions of the Atlas Stellar Atmosphere Program
Creators: name: Lester, John B.
name: Neilson, Hilding R.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Context: The current stellar atmosphere programs still cannot match some fundamental observations of the brightest stars, and with new techniques, such as optical interferometry, providing new data for these stars, additional development of stellar atmosphere codes is required. Aims: To modify the open-source model atmosphere program Atlas to treat spherical geometry, creating a test-bed stellar atmosphere code for stars with extended atmospheres. Methods: The plane-parallel Atlas has been changed by introducing the necessary spherical modifications in the pressure structure, in the radiative transfer and in the temperature correction. Results: Several test models show that the spherical program matches the plane-parallel models in the high surface gravity regime, and matches spherical models computed by Phoenix and by MARCS in the low gravity case.
description: 10 pages, 10 figures, Accepted for publication in A&A
title: Illustration, interpretation, and innovation : 151 years of visual-arts adaptations of the poetic works of Charles Baudelaire
Creators: name: Dakin, Fiona
Publisher: name: University of St Andrews
Year: 2020

description: At least 125 artists have adapted the poetic works of Charles Baudelaire using a visual medium. This corpus of over 1000 images dates from 1866 to 2017, and includes illustrations, paintings, photography, comic books, and a television series. This thesis analyses individual images with an aim to uncover new readings of Baudelaire, as well as new approaches to adaptation. The most prominent trend in the corpus is the erotic, highlighting the legacy of Les Fleurs du mal’s 1857 obscenity trial. The representational aesthetic used by many of these artists mirrors the link that Baudelaire draws between close representation and pornography. Several artists have, conversely, used abstract art to illustrate Baudelaire, suggesting that some element of the source other than narrative is being adapted in these works. Indeed, certain proponents of abstraction point towards Baudelaire’s art criticism as an early movement away from representation in the modern age. Ironically, several artists have chosen to adapt Baudelaire using photography, emphasising the role of the imagination in this medium that the poet deemed an imitation of nature. Artists using collage to illustrate Baudelaire play another game with representation in their use of pre-existing artworks. These works evoke the Baudelairean ragpicker, who repurposes junk to create novelties. Finally, the two comics in the corpus recall Baudelaire’s essays on caricature, which emphasise the role of the imagination. These works also focus on elements of the source other than narrative, such as aesthetic and mood. Overall, because these artists make decisions about what to adapt (or not) from the source, this thesis is also a study of what matters most for these readers in Baudelaire’s poetry, and the variety of interpretations tangibly demonstrates its multivalence. Moreover, we discover that adaptations do not necessarily form one-way source-to-target relationships, but rather webs of interconnected artworks in multi-directional dialogues.
Isolated flat bands in an interlocking-circles lattice
Creators: name: Li, Siwen
name: Xie, Yuee
name: Chen, Yuanping
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Flat-band physics has attracted much attention in recently years because of its interesting properties and important applications. Some typical lattices have been proposed to generate flat bands, such as Kagome and Lieb lattices. The flat bands in these lattices contact with other bands rather than isolated. However, an ideal flat band should be isolated, because isolation is a prerequisite for a number of important applications. Here, we propose a new lattice that can produce isolated flat bands. The lattice is named as interlocking-circles lattice because its pattern seems like interlocking circles. Moreover, the new lattice is realized in graphene by hydrogenation. In the hydrogenated graphene, there are two nontrivial isolated flat bands appearing around the Fermi level. Upon hole or electron doping, the flat bands split into spin-polarized bands and then result in a ferromagnetic graphene. Our work not only proposes a new type of lattice but also opens a way to find systems with isolated flat bands.
Dark stars at the Galactic centre - the main sequence
Creators: name: Scott, Pat
name: Fairbairn, Malcolm
name: Edsjö, Joakim
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In regions of very high dark matter density such as the Galactic centre, the capture and annihilation of WIMP dark matter by stars has the potential to significantly alter their evolution. We describe the dark stellar evolution code DarkStars, and present a series of grids of WIMP-influenced stellar models for main sequence stars. We describe changes in which occur as a function of the rate of energy injection by WIMPs, for stars of 0.3-2.0 solar masses and metallicities Z = 0.0003-0.02. We show what rates of energy injection can be obtained using realistic orbital parameters for stars at the Galactic centre, including detailed consideration of the velocity and density profiles of dark matter. Capture and annihilation rates are strongly boosted when stars follow elliptical rather than circular orbits. If there is a spike of dark matter induced by the supermassive black hole at the Galactic centre, single solar-mass stars following orbits with periods as long as 50 years and eccentricities as low as 0.9 could be significantly affected. Binary systems with similar periods about the Galactic centre could be affected on even less eccentric orbits. The most striking evidence of this scenario would be the existence of a binary consisting of a low-mass protostar and a higher-mass evolved star. The observation of low-mass stars and/or binaries on such orbits would either provide a detection of WIMP dark matter, or place stringent limits on the combination of the WIMP mass, spin-dependent nuclear-scattering cross-section, halo density and velocity distribution near the Galactic centre. In some cases, the limits on the WIMP mass and spin-dependent nuclear-scattering cross-section would be of comparable sensitivity to current direct-detection experiments.
description: v2: Accepted version, added discussion on binaries. v3: Updated to be consistent with erratum submitted to MNRAS. Main results and all conclusions unchanged
Planck Limits on Cosmic String Tension Using Machine Learning
Creators: name: Torki, M.
name: Hajizadeh, H.
name: Farhang, M.
name: Sadr, A. Vafaei
name: Movahed, S. M. S.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We develop two parallel machine-learning pipelines to estimate the contribution of cosmic strings (CSs), conveniently encoded in their tension ($Gμ$), to the anisotropies of the cosmic microwave background radiation observed by {\it Planck}. The first approach is tree-based and feeds on certain map features derived by image processing and statistical tools. The second uses convolutional neural network with the goal to explore possible non-trivial features of the CS imprints. The two pipelines are trained on {\it Planck} simulations and when applied to {\it Planck} \texttt{SMICA} map yield the $3σ$ upper bound of $Gμ\lesssim 8.6\times 10^{-7}$. We also train and apply the pipelines to make forecasts for futuristic CMB-S4-like surveys and conservatively find their minimum detectable tension to be $Gμ_{\rm min}\sim 1.9\times 10^{-7}$.
description: 11 pages, 7 figures
Covering by discrete and closed discrete sets
Creators: name: Spadaro, Santi
Publisher: name: arXiv
Year: 2008
Subjects: subject: General Topology (math.GN)
subject: FOS: Mathematics
subject: 54A25, 54E52

description: Say that a cardinal number $κ$ is \emph{small} relative to the space $X$ if $κ
description: 12 pages, to appear on Topology and its Applications
Some results for beta Fréchet distribution
Creators: name: Barreto-Souza, Wagner
name: Cordeiro, Gauss M.
name: Simas, Alexandre B.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Methodology (stat.ME)
subject: FOS: Computer and information sciences

description: Nadarajah and Gupta (2004) introduced the beta Fréchet (BF) distribution, which is a generalization of the exponentiated Fréchet (EF) and Fréchet distributions, and obtained the probability density and cumulative distribution functions. However, they do not investigated its moments and the order statistics. In this paper the BF density function and the density function of the order statistics are expressed as linear combinations of Fréchet density functions. This is important to obtain some mathematical properties of the BF distribution in terms of the corresponding properties of the Fréchet distribution. We derive explicit expansions for the ordinary moments and L-moments and obtain the order statistics and their moments. We also discuss maximum likelihood estimation and calculate the information matrix which was not known. The information matrix is easily numerically determined. Two applications to real data sets are given to illustrate the potentiality of this distribution.
Rictulariidae Hall
Creators: name: Santos, Cláudia Portes
name: Gibson, David I.
Publisher: name: Zenodo
Year: 2015
Subjects: Biodiversity
Taxonomy
Animalia
Nematoda
Chromadorea
Rhabditida
Rictulariidae

description: Family Rictulariidae Hall   1. Mouth oriented dorsally; with single oesophageal tooth......................................... Rictularia Froelich Species: Rictularia sp.
 - Mouth apical; with three oesophageal teeth............................................... Pterygodermatites Wedl Species: P. elegans (Travassos, 1928)
description: Published as part of Santos, Cláudia Portes & Gibson, David I., 2015, Checklist of the Helminth Parasites of South American Bats, pp. 471-499 in Zootaxa 3937 (3) on page 474, DOI: 10.11646/zootaxa.3937.3.3, http://zenodo.org/record/240106
How transverse MHD wave-driven turbulence influences the density filling factor in the solar corona?
Creators: name: Sen, Samrat
name: Pant, Vaibhav
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: It is well established that the transverse MHD waves are ubiquitous in the solar corona. One of the possible mechanisms for heating both open (e.g. coronal holes) and closed (e.g. coronal loops) magnetic field regions of the solar corona is due to the MHD wave-driven turbulence. In this work, we have studied the variation in the filling factor of overdense structures in the solar corona due to the generation of the transverse MHD wave-driven turbulence. Using 3D MHD simulations, we estimate the density filling factor of an open magnetic structure by calculating the fraction of the volume occupied by the overdense plasma structures to the entire volume of the simulation domain. Next, we perform forward modeling and generate synthetic spectra of Fe XIII 10749 Å and 10800 Å density sensitive line pairs using FoMo. Using the synthetic images, we again estimate the filling factors. The estimated filling factors obtained from both methods are in reasonable agreement. Also, our results match fairly well with the observations of filling factors in coronal holes and loops. Our results show that the generation of turbulence increases the filling factor of the solar corona.
description: Accepted for publication in the Astrophysical Journal
Determining Parameters of Cool Giant Stars by Modeling Spectrophotometric and Interferometric Observations Using the SAtlas Program
Creators: name: Neilson, Hilding R.
name: Lester, John B.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Context: Optical interferometry is a powerful tool for observing the intensity structure and angular diameter of stars. When combined with spectroscopy and/or spectrophotometry, interferometry provides a powerful constraint for model stellar atmospheres. Aims: The purpose of this work is to test the robustness of the spherically symmetric version of the Atlas stellar atmosphere program, SAtlas, using interferometric and spectrophotometric observations. Methods: Cubes (three dimensional grids) of model stellar atmospheres, with dimensions of luminosity, mass, and radius, are computed to fit observations for three evolved giant stars, ψPhoenicis, γSagittae, and αCeti. The best-fit parameters are compared with previous results. Results: The best-fit angular diameters and values of χ^2 are consistent with predictions using Phoenix and plane-parallel Atlas models. The predicted effective temperatures, using SAtlas, are about 100 to 200 K lower, and the predicted luminosities are also lower due to the differences in effective temperatures. Conclusions: It is shown that the SAtlas program is a robust tool for computing models of extended stellar atmospheres that are consistent with observations. The best-fit parameters are consistent with predictions using Phoenix models, and the fit to the interferometric data for ψPhe differs slightly, although both agree within the uncertainty of the interferometric observations.
description: 5 pages, 6 figures, Accepted for publication in A&A as a Research Note
Gravity Dual of a Quantum Hall Plateau Transition
Creators: name: Davis, Joshua L.
name: Kraus, Per
name: Shah, Akhil
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We show how to model the transition between distinct quantum Hall plateaus in terms of D-branes in string theory. A low energy theory of 2+1 dimensional fermions is obtained by considering the D3-D7 system, and the plateau transition corresponds to moving the branes through one another. We study the transition at strong coupling using gauge/gravity duality and the probe approximation. Strong coupling leads to a novel kind of plateau transition: at low temperatures the transition remains discontinuous due to the effects of dynamical symmetry breaking and mass generation, and at high temperatures is only partially smoothed out.
description: 27 pages, 6 figures, harvmac; v2, references and minor comments added, version to be submitted to JHEP; v3, corrections to section 4
Seuratidae Hall
Creators: name: Santos, Cláudia Portes
name: Gibson, David I.
Publisher: name: Zenodo
Year: 2015
Subjects: Biodiversity
Taxonomy
Animalia
Nematoda
Chromadorea
Rhabditida
Seuratidae

description: Family Seuratidae Hall   Seuratum Hall
 Species: Seuratum sp.
description: Published as part of Santos, Cláudia Portes & Gibson, David I., 2015, Checklist of the Helminth Parasites of South American Bats, pp. 471-499 in Zootaxa 3937 (3) on page 474, DOI: 10.11646/zootaxa.3937.3.3, http://zenodo.org/record/240106
Extrusion and characterization of aluminum/graphene composites
Creators: name: Negendank, Maik
name: Faezi, Hamidreza Rabi
name: Ovsianytskyi, Oleksandr
name: Goerke, Oliver
name: Gurlo, Aleksander
name: Müller, Sören
Publisher: name: Technische Universität Berlin
Year: 2021
Subjects: subject: 530 Physik
subject: 620 Ingenieurwissenschaften und zugeordnete Tätigkeiten
subject: aluminum
subject: graphene nano platelets
subject: GNP
subject: composites
subject: extrusion
subject: microstructure
subject: dispersion
subject: hardness

description: Since its first synthesis in 2004 graphene was characterized intensively and exceptional properties in terms of e.g. mechanical strength, stiffness and electrical as well as thermal conductivity were revealed. These properties make graphene very attractive to be applied as additive in composite materials e.g. to increase strength and conductivity compared to the pure matrix material. In this study graphene nano platelets (GNP) in contents of 0. 5%, 1.0 % and 1.5 % were added to pure (99.7 %) aluminum powder and dispersed via EIRICH mixer method. This method is very appealing since homogenous mixtures can be achieved in significantly lower time when compared to e.g. the ball milling process. After subsequent cold compaction the composite materials were extruded with three different extrusion ratios. The influence of GNP content and extrusion ratio on the specific extrusion pressure is characterized as well the resulting rod surface quality, respectively. The effects of GNP content and extrusion ratio on homogeneity of graphene dispersion in the aluminum matrix, the relative density of the composite as well as hardness were also investigated.
An analytic study towards instabilities of the glasma
Creators: name: Fujii, H.
name: Itakura, K.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Strong longitudinal color flux fields will be created in the initial stage of high-energy nuclear collisions. We investigate analytically time evolution of such boost-invariant color fields from Abelian-like initial conditions, and next examine stability of the boost-invariant configurations against rapidity dependent fluctuations. We find that the magnetic background field has an instability induced by the lowest Landau level whose amplitude grows exponentially. For the electric background field there is no apparent instability although pair creations due to the Schwinger mechanism should be involved.
description: 4p, 3figs; poster contribution to QM2008
Particle Diffusivity and Free-Energy Profiles in Hydrogels from Time-Resolved Penetration Data
Creators: name: Wolde-Kidan, Amanuel
name: Herrmann, Anna
name: Prause, Albert
name: Gradzielski, Michael
name: Haag, Rainer
name: Block, Stephan
name: Netz, Roland R.
Publisher: name: Technische Universität Berlin
Year: 2021
Subjects: subject: 570 Biowissenschaften; Biologie
subject: mucus
subject: hydrogel
subject: particle
subject: diffusivity
subject: free-energy profile

description: A combined experimental and theoretical method to simultaneously determine diffusivity and free-energy profiles of particles that penetrate into inhomogeneous hydrogel systems is presented. As the only input, arbitrarily normalized concentration profiles from fluorescence intensity data of labeled tracer particles for different penetration times are needed. The method is applied to dextran molecules of varying size that penetrate into hydrogels of polyethylene-glycol chains with different lengths that are covalently cross-linked by hyperbranched polyglycerol hubs. Extracted dextran bulk diffusivities agree well with fluorescence correlation spectroscopy data obtained separately. Empirical scaling laws for dextran diffusivities and free energies inside the hydrogel are identified as a function of the dextran mass. An elastic free-volume model that includes dextran as well as polyethylene-glycol linker flexibility quantitively describes the repulsive dextran-hydrogel interaction free energy, which is of steric origin, and furthermore suggests that the hydrogel mesh-size distribution is rather broad and particle penetration is dominated by large hydrogel pores. Particle penetration into hydrogels for steric particle-hydrogel interactions is thus suggested to be governed by an elastic size-filtering mechanism that involves the tail of the hydrogel pore-size distribution.