cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
On connected Lie groups and the Approximation Property
Creators: name: Knudby, Søren
Publisher: name: arXiv
Year: 2016
Subjects: subject: Operator Algebras (math.OA)
subject: Functional Analysis (math.FA)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics

description: Recently, a complete characterization of connected Lie groups with the Approximation Property was given. The proof used of the newly introduced property (T*). We present here a short proof of the same result avoiding the use of property (T*). Using property (T*), however, the characterization is extended to every almost connected group. We end with some remarks about the impossibility of going beyond the almost connected case.
description: 4 pages
Separating Electroweak and Strong interactions in Drell-Yan processes at LHC: leptons angular distributions and reference frames
Creators: name: Richter-Was, E.
name: Was, Z.
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Among the physics goals of LHC experiments, precision tests of the Standard Model in the Strong and Electroweak sectors play an important role. Because of nature of the proton-proton processes, observables based on the measurement of the direction and energy of leptons provide the most precise signatures. In the present paper, we concentrate on the angular distribution of Drell-Yan process leptons, in the lepton-pair rest-frame. The vector nature of the intermediate state imposes that distributions are to a good precision described by spherical polynomials of at most second order. We show that with the proper choice of the coordinate frames, only one coefficient in this polynomial decomposition remains sizable, even in the presence of one or two high $p_T$ jets. The necessary stochastic choice of the frames relies on probabilities independent from any coupling constants. This remains true when one or two partons accompany the lepton pairs. In this way electroweak effects can be better separated from strong interaction ones for the benefit of the interpretation of the measurements. Our study exploits properties of single gluon emission matrix elements which are clearly visible if a conveniently chosen form of their representation is used. We rely also on distributions obtained from matrix element based Monte Carlo generated samples of events with two leptons and up to two additional partons in test samples. Incoming colliding protons' partons are distributed accordingly to PDFs and are strictly collinear to the corresponding beams.
description: 22 pages 9 figures
Quark and gluon orbital angular momentum: Where are we?
Creators: name: Lorcé, Cédric
name: Liu, K. F.
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The orbital angular momentum of quarks and gluons contributes significantly to the proton spin budget and attracted a lot of attention in the recent years, both theoretically and experimentally. We summarize the various definitions of parton orbital angular momentum together with their relations with parton distributions functions. In particular, we highlight current theoretical puzzles and give some prospects.
description: 6 pages, contribution to the proceedings of the LigthCone 2015 Conference, Sep 21-25, INFN Frascati National Laboratories, Frascati, Italy
General Buddhoe und Peter von Scholten.
Creators: name: Hüsgen, Jan
Publisher: name: Leipziger Universitätsverlag
Year: 2012

description: The article deals with the construction of commemorative traditions of slave emancipation in the U. S. Virgin Islands and in Denmark. In 1848 a successful revolt of the slaves ended slavery in the Danish Caribbean colonies. In Denmark this event is connected with Peter von Scholten, who proclaimed the slave emancipation, heavily pressed by the slaves, whereas in the U. S. Virgin Islands one of the leaders of the rebellion, General Buddhoe, is synonymous with emancipation and resistance. By analysing the depiction of von Scholten and Buddhoe in the Danish movie “Peter von Scholten” the article points out how the Danish created a dominant narrative of slave emancipation.
description: Comparativ, Vol 22 No 2 (2012): Erinnerungen an Sklaverei
Purine receptors in the vasculature
Creators: name: Rose'Meyer., Roselyn Barbara
Publisher: name: Monash University
Year: 2021

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
 Researchers can access this thesis by asking their local university, institution or public library to
 make a request on their behalf. Monash staff and postgraduate students can use the link in the References field.
Curating Art Therapy: A conversation
Creators: name: Edward, David
name: Damarell, Barrie
Publisher: name: Art Therapy Online
Year: 2019

description: This article is based on several conversations between the authors – David Edwards and Barrie Damarell – prior to and following the exhibition – ‘A personal history of Art Therapy in less than 100 objects’ – held at Gallery 35, Chapel Walk, Sheffield between Monday September 10th to Saturday September 15th, 2018. The authors discuss the rationale for the exhibition, together with the process of curating it. Keywords: Art, Art Therapy, Exhibition, History, Objects, Retirement
description: Art Therapy Online, Vol 10 No 2 (2019)
Two-way Gaussian quantum cryptography against coherent attacks in direct reconciliation
Creators: name: Ottaviani, Carlo
name: Mancini, Stefano
name: Pirandola, Stefano
Publisher: name: arXiv
Year: 2015
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We consider the two-way quantum cryptographic protocol with coherent states assuming direct reconciliation. A detailed security analysis is performed considering a two-mode coherent attack, that represents the residual eavesdropping once the parties have reduced the general attack by applying symmetric random permutations. In this context we provide a general analytical expression for the keyrate, discussing the impact of the residual two-mode correlations on the security of the scheme. In particular we identify the optimal eavesdropping against two-way quantum communication, which is given by a two-mode coherent attack with symmetric and separable correlations.
description: 8 pages, 5 figures. Close to the published version
Topological recursion for Masur–Veech volumes
Creators: name: Andersen, Jørgen Ellegaard
name: Borot, Gaetan
name: Charbonnier, Séverin
name: Delecroix, Vincent
name: Giacchetto, Alessandro
name: Lewanski, Danilo
name: Wheeler, Campbell
Publisher: name: Humboldt-Universität zu Berlin
Year: 2022
Subjects: subject: 510 Mathematik

description: We study the Masur–Veech volumes MVg,n of the principal stratum of the moduli space of quadratic differentials of unit area on curves of genus g with n punctures. We show that the volumes MVg,n are the constant terms of a family of polynomials in n variables governed by the topological recursion/Virasoro constraints. This is equivalent to a formula giving these polynomials as a sum over stable graphs, and retrieves a result of [Delecroix, Goujard, Zograf, Zorich, Duke J. Math 170 (2021), no. 12, math.GT/1908.08611] proved by combinatorial arguments. Our method is different: it relies on the geometric recursion and its application to statistics of hyperbolic lengths of multicurves developed in [Andersen, Borot, Orantin, Geometric recursion, math.GT/1711.04729, 2017]. We also obtain an expression of the area Siegel–Veech constants in terms of hyperbolic geometry. The topological recursion allows numerical computations of Masur–Veech volumes, and thus of area Siegel–Veech constants, for low g and n, which leads us to propose conjectural formulae for low g but all n. We also relate our polynomials to the asymptotic counting of square-tiled surfaces with large boundaries.
On the design of optimal compliant walls for turbulence control
Creators: name: Luhar, M.
name: Sharma, A. S.
name: McKeon, B. J.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: This paper employs the theoretical framework developed by Luhar et al. (J. Fluid Mech., 768, 415-441) to consider the design of compliant walls for turbulent skin friction reduction. Specifically, the effects of simple spring-damper walls are contrasted with the effects of more complex walls incorporating tension, stiffness and anisotropy. In addition, varying mass ratios are tested to provide insight into differences between aerodynamic and hydrodynamic applications. Despite the differing physical responses, all the walls tested exhibit some important common features. First, the effect of the walls (positive or negative) is greatest at conditions close to resonance, with sharp transitions in performance across the resonant frequency or phase speed. Second, compliant walls are predicted to have a more pronounced effect on slower-moving structures because such structures generally have larger wall-pressure signatures. Third, two-dimensional (spanwise constant) structures are particularly susceptible to further amplification. These features are consistent with many previous experiments and simulations, suggesting that mitigating the rise of such two-dimensional structures is essential to designing performance-improving walls. For instance, it is shown that further amplification of such large-scale two-dimensional structures explains why the optimal anisotropic walls identified by Fukagata et al. via DNS (J. Turb., 9, 1-17) only led to drag reduction in very small domains. The above observations are used to develop design and methodology guidelines for future research on compliant walls.
Caminos de Montejo – Erinnerungen und Orte des Cimarrón Esteban Montejo
Creators: name: Cron, Stefan
Publisher: name: Leipziger Universitätsverlag
Year: 2012

description: Esteban Montejo was the ‘Cimarrón’ in Miguel Barnets Book Biografía de un cimarrón. He spent most of the timeof his life in the rural parts of central Cuba, where he worked and lived on several sugar cane plantations. Those places, forming stations of his life, will be presented here. In some places of his life slavery is remembered until today, in others all traces have been lost.
description: Comparativ, Vol 22 No 2 (2012): Erinnerungen an Sklaverei
Characterization of the 43 kDa inositol polyphosphate 5-phosphatase : catalytic function and intracellular location
Creators: name: Lopez., Susana Romero
Publisher: name: Monash University
Year: 2021

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
 Researchers can access this thesis by asking their local university, institution or public library to
 make a request on their behalf. Monash staff and postgraduate students can use the link in the References field.
MIDAS: Lessons learned from the first spaceborne atomic force microscope
Creators: name: Bentley, Mark S.
name: Arends, Herman
name: Butler, Bart
name: Gavira, Jose
name: Jeszenszky, Harald
name: Mannel, Thurid
name: Romstedt, Jens
name: Schmied, Roland
name: Torkar, Klaus
Publisher: name: arXiv
Year: 2016
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: The Micro-Imaging Dust Analysis System (MIDAS) atomic force microscope (AFM) onboard the Rosetta orbiter was the first such instrument launched into space in 2004. Designed only a few years after the technique was invented, MIDAS is currently orbiting comet 67P Churyumov-Gerasimenko and producing the highest resolution 3D images of cometary dust ever made in situ. After more than a year of continuous operation much experience has been gained with this novel instrument. Coupled with operations of the Flight Spare and advances in terrestrial AFM a set of "lessons learned" has been produced, cumulating in recommendations for future spaceborne atomic force microscopes. The majority of the design could be reused as-is, or with incremental upgrades to include more modern components (e.g. the processor). Key additional recommendations are to incorporate an optical microscope to aid the search for particles and image registration, to include a variety of cantilevers (with different spring constants) and a variety of tip geometries.
description: To be published in Acta Astronautica
The identification and function of reprogramming proteins in pluripotent cells
Creators: name: Rollo., Ben
Publisher: name: Monash University
Year: 2021

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
 Researchers can access this thesis by asking their local university, institution or public library to
 make a request on their behalf. Monash staff and postgraduate students can use the link in the References field.
Towards a classification of compact quantum groups of Lie type
Creators: name: Neshveyev, Sergey
name: Yamashita, Makoto
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Algebra (math.QA)
subject: Operator Algebras (math.OA)
subject: FOS: Mathematics

description: This is a survey of recent results on classification of compact quantum groups of Lie type, by which we mean quantum groups with the same fusion rules and dimensions of representations as for a compact connected Lie group $G$. The classification is based on a categorical duality for quantum group actions recently developed by De Commer and the authors in the spirit of Woronowicz's Tannaka--Krein duality theorem. The duality establishes a correspondence between the actions of a compact quantum group $H$ on unital C$^*$-algebras and the module categories over its representation category Rep $H$. This is further refined to a correspondence between the braided-commutative Yetter--Drinfeld $H$-algebras and the tensor functors from Rep $H$. Combined with the more analytical theory of Poisson boundaries, this leads to a classification of dimension-preserving fiber functors on the representation category of any coamenable compact quantum group in terms of its maximal Kac quantum subgroup, which is the maximal torus for the $q$-deformation of $G$ if $q\ne1$. Together with earlier results on autoequivalences of the categories Rep $G_q$, this allows us to classify up to isomorphism a large class of quantum groups of $G$-type for compact connected simple Lie groups $G$. In the case of $G=SU(n)$ this class exhausts all non-Kac quantum groups.
description: 23 pages
Cross-field transport in Goldreich-Sridhar MHD turbulence
Creators: name: Fraschetti, F.
Publisher: name: arXiv
Year: 2015
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Plasma Physics (physics.plasm-ph)
subject: Space Physics (physics.space-ph)
subject: FOS: Physical sciences

description: I derive analytically the temporal dependence of the perpendicular transport coefficient of a charged particle in the three-dimensional anisotropic turbulence conjectured by Goldreich-Sridhar by implementing multi-spacecraft constraints on the turbulence power spectrum. The particle motion away from the turbulent local field line is assessed as gradient/curvature drift of the guiding-center and compared with the magnetic field line random walk. At inertial scales much smaller than the turbulence outer scale, particles decorrelate from field lines in a free-streaming motion, with no diffusion. In the solar wind at $1$ AU, for energy sufficiently small ($< 1$ keV protons), the perpendicular average displacement due to field line tangling generally dominates over two decades of turbulent scales. However, for higher energies ($\simeq 25$ MeV protons) within the range of multi-spacecraft measurements, the longitudinal spread originating from transport due to gradient/curvature drift reaches up to $\simeq 10^\circ- 20^\circ$. This result highlights the role of the perpendicular transport in the interpretation of interplanetary and interstellar data.
description: 25 pages, 3 figures, PRE in press
Das Ende von Saint-Domingue.
Creators: name: Bandau, Anja
Publisher: name: Leipziger Universitätsverlag
Year: 2012

description: This article looks at the origin of narratives on the Haitian Revolution in the context of competing narrations of slavery and abolition. I argue that the first texts written by white settlers and survivors of slave rebellion take part in the constitution of a cultural memory and bear witness to a process of remembering that includes forgetting and transformation, while it lays out lines of the unspeakable. These texts – historiographic accounts, testimonial and fugitive narratives – constitute a pool of narratives and anecdotes nourishing the modes and figures of remembering effective until the 20th century. Although competing communities of memory create competing narratives, something like a shared canon of figures and narrations emerges. Through a diachronic reading of different texts that visualizes processes of transformation, the reader is able to trace the ways in which a binding frame of memory is constituted.
description: Comparativ, Vol 22 No 2 (2012): Erinnerungen an Sklaverei
On the noncommutative deformation of the operator graph corresponding to the Klein group
Creators: name: Amosov, G. G.
name: Zhdanovskiy, I. Yu.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Physics (quant-ph)
subject: Algebraic Geometry (math.AG)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We study the noncommutative operator graph ${\mathcal L}_{θ}$ depending on complex parameter $θ$ recently introduced by M.E. Shirokov to construct channels with positive quantum zero-error capacity having vanishing n-shot capacity. We define the noncommutative group $G$ and the algebra ${\mathcal A}_{θ}$ which is a quotient of ${\mathbb C}G$ with respect to the special algebraic relation depending on $θ$ such that the matrix representation $ϕ$ of ${\mathcal A}_{θ}$ results in the algebra ${\mathcal M}_{θ}$ generated by ${\mathcal L}_{θ}$. In the case of $θ=\pm 1$ $ϕ$ is degenerated to the faithful representation of ${\mathbb C}K_4$, where $K_4$ is the Klein group. Thus, ${\mathcal L}_{θ}$ can be considered as a noncommutative deformation of the graph associated with the Klein group.
description: 22 pages, extended version of arXiv:1512.02096
title: Operationele voorspelling dwarsstroming Platen van Ossenisse: deelrapport 3. Validatie NeVla model voor representatie dwarsstromingen Ossenisse
Creators: name: Stark, Jeroen
name: Vanlede, Joris
name: Plancke, Yves
Publisher: name: Flanders Hydraulics Research
Year: 2022

description: Title : WL Rapporten. Waterbouwkundig Laboratorium: Antwerpen. Volume : 20_060_3 Issue : Pagination : VIII, 47 + 21 bijl.
Line-depth-ratio temperatures for the close binary nu Octantis: new evidence supporting the conjectured retrograde planet
Creators: name: Ramm, David J.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We explore the possibly that either star-spots or pulsations are the cause of a periodic radial-velocity signal (P~400 days) from the K-giant binary nu Octantis (P~1050 days, e~0.25), alternatively conjectured to have a retrograde planet. Our study is based on temperatures derived from 22 line-depth ratios (LDRs) for nu Oct and twenty calibration stars. Empirical evidence and stability modelling provide unexpected support for the planet since other standard explanations (star-spots, pulsations and additional stellar masses) each have credibility problems. However, the proposed system presents formidable challenges to planet-formation and stability theories: it has by far the smallest stellar separation of any claimed planet-harbouring binary (a_bin~2.6 au) and an equally unbelievable separation ratio (a_pl/a_bin~0.5), hence the necessity that the circumstellar orbit be retrograde. The LDR analysis of 215 nu Oct spectra acquired between 2001--2007, from which the RV perturbation was first revealed, have no significant periodicity at any frequency. The LDRs recover the original 21 stellar temperatures with an average accuracy of 45+/-25 K. The 215 nu Oct temperatures have a standard deviation of only 4.2 K. Assuming the host primary is not pulsating, the temperatures converted to magnitude differences strikingly mimic the very stable photometric Hipparcos observations 15 years previously, implying the long-term stability of the star and demonstrating a novel use of LDRs as a photometric gauge. Our results provide substantial new evidence that conventional star-spots and pulsations are unlikely causes of the RV perturbation. The controversial system deserves continued attention, including with higher resolving-power spectra for bisector and LDR analyses.
Zumbi and the Voices of the Emergent Public Memory of Slavery and Resistance in Brazil
Creators: name: Araujo, Ana Lucia
Publisher: name: Leipziger Universitätsverlag
Year: 2012

description: Dieser Artikel untersucht die Entwicklung der öffentlichen Erinnerung an Sklaverei in Brasilien. Er versucht zu verstehen, warum Sklaverei nach und nach im öffentlichen Raum sichtbar wird. Bei der Untersuchung der Initiativen zur Förderung des materiellen und immateriellen Erbes der Sklaverei widmet der Text der Erinnerung an den Widerstand gegen die Sklaverei, verkörpert durch Zumbi, den Anführer des quilombo Palmares, der größten und dauerhaftesten Sklavenfluchtsiedlung, besondere Aufmerksamkeit. Er belegt die wachsende Präsenz von Sklaven und Sklavinnen, die gegen die Sklaverei gekämpft haben, im öffentlichen Raum als Teil eines umfassenderen Phänomens, das in verschiedenen Städten der Karibik und Lateinamerikas erkennbar ist. Der Beitrag schließt damit zu zeigen, dass die wachsende Zahl von Denkmälern für Zumbi in Brasilien nicht nur aus dem Bedürfnis entspringt, schwarze historische Akteure sichtbar zu machen, sondern auch das Ergebnis der Forderungen ist, gegenwärtige soziale und ethnische Ungleichheiten zu beenden.
description: Comparativ, Vol 22 No 2 (2012): Erinnerungen an Sklaverei
A correlation between the HI 21-cm absorption strength and impact parameter in external galaxies
Creators: name: Curran, S. J.
name: Reeves, S. N.
name: Allison, J. R.
name: Sadler, E. M.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: By combining the data from surveys for HI 21-cm absorption at various impact parameters in near-by galaxies, we report an anti-correlation between the 21-cm absorption strength (velocity integrated optical depth) and the impact parameter. Also, by combining the 21-cm absorption strength with that of the emission, giving the neutral hydrogen column density, we find no evidence that the spin temperature of the gas (degenerate with the covering factor) varies significantly across the disk. This is consistent with the uniformity of spin temperature measured across the Galactic disk. Furthermore, comparison with the Galactic distribution suggests that intervening 21-cm absorption preferentially arises in disks of high inclinations (near face-on). We also investigate the hypothesis that 21-cm absorption is favourably detected towards compact radio sources. Although there is insufficient data to determine whether there is a higher detection rate towards quasar, rather than radio galaxy, sight-lines, the 21-cm detections intervene objects with a mean turnover frequency of 5 x 10^8 Hz, compared to 1 x 10^8 Hz for the non-detections. Since the turnover frequency is anti-correlated with radio source size, this does indicate a preferential bias for detection towards compact background radio sources.
description: 8 pages accepted by MNRAS
Three Twin Neutrinos: Evidence from LSND and MiniBooNE
Creators: name: Bai, Yang
name: Lu, Ran
name: Lu, Sida
name: Salvado, Jordi
name: Stefanek, Ben A.
Publisher: name: arXiv
Year: 2015
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We construct a neutrino model of three twin neutrinos in light of the neutrino appearance excesses at LSND and MiniBooNE. The model, which includes a twin parity, naturally predicts identical lepton Yukawa structures in the Standard Model and the twin sectors. As a result, a universal mixing angle controls all three twin neutrino couplings to the Standard Model charged leptons. This mixing angle is predicted to be the ratio of the electroweak scale over the composite scale of the Higgs boson and has the right order of magnitude to fit the data. The heavy twin neutrinos decay within the experimental lengths into active neutrinos plus a long-lived Majoron and can provide a good fit, at around $4σ$ confidence level, to the LSND and MiniBooNE appearance data while simultaneously satisfying the disappearance constraints. For the Majorana neutrino case, the fact that neutrinos have a larger scattering cross section than anti-neutrinos provides a natural explanation to MiniBooNE's observation of a larger anti-neutrino appearance excess.
Hydrogen molecular ions for improved determination of fundamental constants
Creators: name: Karr, J. -Ph
name: Hilico, L
name: Koelemeij, Jeroen
name: Korobov, Vladimir
Publisher: name: arXiv
Year: 2016
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: The possible use of high-resolution rovibrational spectroscopy of the hydrogen molecular ions H + 2 and HD + for an independent determination of several fundamental constants is analyzed. While these molecules had been proposed for metrology of nuclear-to-electron mass ratios, we show that they are also sensitive to the radii of the proton and deuteron and to the Rydberg constant at the level of the current discrepancies colloquially known as the proton size puzzle. The required level of accuracy, in the 10 --12 range, can be reached both by experiments, using Doppler-free two-photon spectroscopy schemes, and by theoretical predictions. It is shown how the measurement of several well-chosen rovibrational transitions may shed new light on the proton-radius puzzle, provide an alternative accurate determination of the Rydberg constant, and yield new values of the proton-to-electron and deuteron-to-proton mass ratios with one order of magnitude higher precision.
Orte des Erinnerns und Vergessens:
Creators: name: Schmieder, Ulrike
Publisher: name: Leipziger Universitätsverlag
Year: 2012

description: This paper refers to the „lieux de mémoire”, places of memory, of slave trade and slavery in some former colonial states which possessed plantations colonies in the Caribbean, England, France and Spain, and some former slavery societies, the U.S.A., the French and British West Indies, Cuba, and Brazil. It examines the development of the historiography on the topic, the development of memory practices from the honouring of white abolitionists to museums and monuments representing the slave´ s experience and resistance of slaves and maroons. Historical places where slavery took place (plantations, slave trade ports) or where it should be remembered in the context of colonial history (i. g. the Museo de América in Madrid), but where the memory is silenced because of political or commercial reasons, are also treated. The text tries to find out which social and political conditions lead to which forms of remembering or forgetting the history of slavery.
description: Comparativ, Vol 22 No 2 (2012): Erinnerungen an Sklaverei
An Invitation to the Mathematics of Topological Quantum Computation
Creators: name: Rowell, Eric C.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mathematical Physics (math-ph)
subject: Quantum Algebra (math.QA)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: Two-dimensional topological states of matter offer a route to quantum computation that would be topologically protected against the nemesis of the quantum circuit model: decoherence. Research groups in industry, government and academic institutions are pursuing this approach. We give a mathematician's perspective on some of the advantages and challenges of this model, highlighting some recent advances. We then give a short description of how we might extend the theory to three-dimensional materials.
description: 10 figures, 1 table. Submitted to the proceeding of Quantumfest 2015. Dedicated to the memory of Sujeev Wickramasekara
Erinnerungskulturen und Geschichtspolitik im Hinblick auf transatlantischen Sklavenhandel und Sklaverei
Creators: name: Schmieder, Ulrike
name: Zeuske, Michael
Publisher: name: Leipziger Universitätsverlag
Year: 2012

description: This introduction explains the principal object of this volume of Comparativ to show when, where, how and by which media transatlantic slave trade and slavery have been remembered in former colonial states, plantation societies and in Germany until 2011, the International Year for People of African Descent, which focuses on the African diasporas as consequence of the slave trades. This article describes the historiography about this topic and social and political context of actual discussions on the national and international level which forms of commemoration are adequate to remember the victimization and the resistance of enslaved people, and also marks the silences and omissions on transatlantic slavery that persist until today.
description: Comparativ, Vol 22 No 2 (2012): Erinnerungen an Sklaverei
Psychoanalysis with children : history, theory and practice
Creators: name: Rodríguez., Leonardo S.
Publisher: name: Monash University
Year: 2021

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
 Researchers can access this thesis by asking their local university, institution or public library to
 make a request on their behalf. Monash staff and postgraduate students can use the link in the References field.
An ML-based Method for Efficient Network Utilization in Online Gaming Using 5G Network Slicing
Creators: name: Saleh, Peyman
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 2023
Subjects: 5G
slicing
Network
ML
Deep

description: Online video gaming has become a ubiquitous aspect of modern-day video gaming. It has gained immense popularity due to its accessibility and immersive experience, resulting in millions of players worldwide participating in various online games. Depending on the type of gameplay, the players’ quality of experience (QoE) in online video gaming can be significantly affected by network factors such as high bandwidth and low latency. As such, providers of online gaming services are competing to offer the highest quality of experience to their users at reasonable prices. To achieve this objective, online game providers face two main challenges. Firstly, they must accurately estimate the network throughput capacity required to meet the servers’ demands and ensure that the QoE is not compromised. Secondly, they must be able to secure the required throughput with network providers, which, in the current conventional network infrastructure, is neither agile nor dynamic. Thus, online game providers have to prepay for extra network throughput capacity or choose a cost-effective capacity that may result in potential QoE losses during peak usage. To address these challenges, this thesis proposes a deep neural network-based model that utilizes a QoE-aware loss function for predicting the future network throughput de- mand. The model can accurately estimate the network throughput capacity required to maintain QoE levels while minimizing the cost of network resources. By doing so, on- line game providers can achieve optimal network resource allocation and effectively meet servers’ demands. Furthermore, this thesis proposes a slice optimizer module that employs 5G network slicing and a machine learning model to optimize network slices in a cost-efficient manner that satisfies both the online game provider’s and the network provider’s requirements. This module can dynamically allocate network resources based on the game provider’s QoE requirements, the network provider’s resource availability, and the cost of network resources. As a result, online game providers can efficiently manage network resources, optimize network slicing, and effectively control the cost of network resources.
Displaced harmonic oscillator $V\sim \min \,[(x+d)^2,(x-d)^2]$ as a benchmark double-well quantum model
Creators: name: Znojil, Miloslav
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: For the displaced harmonic double-well oscillator the existence of exact polynomial bound states at certain displacements $d\,$ is revealed. The $N-$plets of these quasi-exactly solvable (QES) states are constructed in closed form. For non-QES states, Schrödinger equation can still be considered ``non-polynomially exactly solvable'' (NES) because the exact left and right parts of the wave function (proportional to confluent hypergeometric function) just have to be matched in the origin.
description: 21 pages, 3 figures
Refrustration and competing orders in the prototypical Dy2Ti2O7 spin ice material
Creators: name: Henelius, P.
name: Lin, T.
name: Enjalran, M.
name: Hao, Z.
name: Rau, J. G.
name: Altosaar, J.
name: Flicker, F.
name: Yavors'kii, T.
name: Gingras, M. J. P.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Spin ices, frustrated magnetic materials analogous to common water ice, are exemplars of high frustration in three dimensions. Recent experimental studies of the low-temperature properties of the paradigmatic Dy$_2$Ti$_2$O$_7$ spin ice material, in particular whether the predicted transition to long-range order occurs, raise questions as per the currently accepted microscopic model of this system. In this work, we combine Monte Carlo simulations and mean-field theory calculations to analyze data from magnetization, elastic neutron scattering and specific heat measurements on Dy$_2$Ti$_2$O$_7$. We also reconsider the possible importance of the nuclear specific heat, $C_{\rm nuc}$, in Dy$_2$Ti$_2$O$_7$. We find that $C_{\rm nuc}$ is not entirely negligible below a temperature $\sim 0.5$ K and must be taken into account in a quantitative analysis of the calorimetric data of this compound below that temperature. We find that small effective exchange interactions compete with the magnetostatic dipolar interaction responsible for the main spin ice phenomenology. This causes an unexpected "refrustration" of the long-range order that would be expected from the incompletely self-screened dipolar interaction and which positions the material at the boundary between two competing classical long-range ordered ground states. This allows for the manifestation of new physical low-temperature phenomena in Dy$_2$Ti$_2$O$_7$, as exposed by recent specific heat measurements. We show that among the four most likely causes for the observed upturn of the specific heat at low temperature -- an exchange-induced transition to long-range order, quantum non-Ising (transverse) terms in the effective spin Hamiltonian, the nuclear hyperfine contribution and random disorder -- only the last appears to be reasonably able to explain the calorimetric data.
description: 24 pages, 18 figures. To appear in Physical Review B
Exploring the Potential of Internal Information Flows in Large Organizations as Leverage Points for Environmental Stewardship
Creators: name: Farhad, Sherman
name: McGlynn, Bridget
name: Baird, Julia
name: Plummer, Ryan
name: Blythe, Jessica
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Space Science
subject: Microbiology
subject: FOS: Biological sciences
subject: Biotechnology
subject: Ecology
subject: Science Policy
subject: 69999 Biological Sciences not elsewhere classified
subject: 110309 Infectious Diseases
subject: FOS: Health sciences

description: Large organizations play a critical role in environmental stewardship. The concept of leverage points offers one promising avenue of inquiry to enhance the effectiveness of large organizations in advancing environmental stewardship. Here, we focus on the flow of information within a large environmental organization as a deep leverage point for system change. We conducted a social network analysis of an organization with an environmental stewardship mandate. Results show that the organization has a dense communication network that could be effectively leveraged for environmental stewardship communication, especially by influential individuals and departments. As practical implications, we recommend that an environmental stewardship-focused communication approach, based on four strategies (segmentation, induction, two-way communication, and individual strategies) be enacted by the organization to use this leverage point to enhance the diffusion of environmental stewardship. Directions for future research include a deep study of the plurality of understandings of environmental stewardship within the organization.
On the dimension of Bernoulli convolutions
Creators: name: Breuillard, Emmanuel
name: Varjú, Péter P.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: Dynamical Systems (math.DS)
subject: Probability (math.PR)
subject: FOS: Mathematics

description: The Bernoulli convolution with parameter $λ\in(0,1)$ is the probability measure $μ_λ$ that is the law of the random variable $\sum_{n\ge0}\pmλ^n$, where the signs are independent unbiased coin tosses. We prove that each parameter $λ\in(1/2,1)$ with $\dimμ_λ<1$ can be approximated by algebraic parameters $ξ\in(1/2,1)$ within an error of order $\exp(-deg(ξ)^{A})$ for any number $A$, such that $\dimμ_ξ<1$. As a corollary, we conclude that $\dimμ_λ=1$ for each of $λ=\ln 2, e^{-1/2}, π/4$. These are the first explicit examples of such transcendental parameters. Moreover, we show that Lehmer's conjecture implies the existence of a constant $a<1$ such that $\dimμ_λ=1$ for all $λ\in(a,1)$.
description: 34 pages; version accepted for publication in Ann. Probab.; two typos corrected; results and proofs are unchanged
How are the degrees of freedom responsible for entropy in BTZ spacetime?
Creators: name: Singh, Dharm Veer
name: Sachan, Shobhit
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The entanglement entropy approach to study the dependence of entropy upon the location of degrees of freedom (dof) (near/far) from the horizon is discussed in this article. We try to understand the physical deviation of the area law for the excited states by incorporating the logarithmic and power law corrections. We show that the dof near the horizon gives contribution to the total entropy of the system in the ground state and away from the event horizon gives contribution to the excited state.
description: 2 figures, 11 pages, published version. arXiv admin note: text overlap with arXiv:0806.0402 by other authors
Capture cross sections of 15N(n, γ)16N at astrophysical energies
Creators: name: Fan, Guang-wei
name: Ma, Jun-bing
name: Sheng, Zong-qiang
name: Tian, Feng
name: Wang, Jun
name: Zhang, Chao
Publisher: name: arXiv
Year: 2016
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We have reanalyzed reaction cross sections of 16N on 12C target. The nucleon density distribution of 16N, especially surface density distribution, was extracted using the modified Glauber model. On the basis of dilute surface densities, the discussion of 15N(n, γ)16N reaction was performed within the framework of the direct capture reaction mechanism. The calculations agreed quite well with the experimental data.
description: 5 pages, 3 figures. arXiv admin note: text overlap with arXiv:0810.3867 by other authors
Logarithmic girth expander graphs of $SL_n(\mathbb F_p)$
Creators: name: Arzhantseva, Goulnara
name: Biswas, Arindam
Publisher: name: arXiv
Year: 2018
Subjects: subject: Group Theory (math.GR)
subject: Combinatorics (math.CO)
subject: Metric Geometry (math.MG)
subject: FOS: Mathematics
subject: 20G40, 05C25, 20E26, 20F65

description: We provide an explicit construction of finite 4-regular graphs $(Γ_k)_{k\in \mathbb N}$ with ${girth Γ_k\to\infty}$ as $k\to\infty$ and $\frac{diam Γ_k}{girth Γ_k}\leqslant D$ for some $D>0$ and all $k\in\mathbb{N}$. For each fixed dimension $n\geqslant 2,$ we find a pair of matrices in $SL_{n}(\mathbb{Z})$ such that (i) they generate a free subgroup, (ii)~their reductions $\bmod\, p$ generate $SL_{n}(\mathbb{F}_{p})$ for all sufficiently large primes $p$, (iii) the corresponding Cayley graphs of $SL_{n}(\mathbb{F}_{p})$ have girth at least $c_n\log p$ for some $c_n>0$. Relying on growth results (with no use of expansion properties of the involved graphs), we observe that the diameter of those Cayley graphs is at most $O(\log p)$. This gives infinite sequences of finite $4$-regular Cayley graphs of $SL_n(\mathbb F_p)$ as $p\to\infty$ with large girth and bounded diameter-by-girth ratio. These are the first explicit examples in all dimensions $n\geqslant 2$ (all prior examples were in $n=2$). Moreover, they happen to be expanders. Together with Margulis' and Lubotzky-Phillips-Sarnak's classical constructions, these new graphs are the only known explicit logarithmic girth Cayley graph expanders.
description: Title and content updated to reflect published version. Previous title: "Large girth graphs with bounded diameter-by-girth ratio"
Bright galaxies at Hubble's redshift detection frontier: Preliminary results and design from the redshift z~9-10 BoRG pure-parallel HST survey
Creators: name: Calvi, V.
name: Trenti, M.
name: Stiavelli, M.
name: Oesch, P.
name: Bradley, L. D.
name: Schmidt, K. B.
name: Coe, D.
name: Brammer, G.
name: Bernard, S.
name: Bouwens, R. J.
name: Carrasco, D.
name: Carollo, C. M.
name: Holwerda, B. W.
name: MacKenty, J. W.
name: Mason, C. A.
name: Shull, J. M.
name: Treu, T.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present the first results and design from the redshift z~9-10 Brightest of the Reionizing Galaxies {\it Hubble Space Telescope} survey BoRG[z9-10], aimed at searching for intrinsically luminous unlensed galaxies during the first 700 Myr after the Big Bang. BoRG[z9-10] is the continuation of a multi-year pure-parallel near-IR and optical imaging campaign with the Wide Field Camera 3. The ongoing survey uses five filters, optimized for detecting the most distant objects and offering continuous wavelength coverage from λ=0.35μm to λ=1.7μm. We analyze the initial ~130 arcmin$^2$ of area over 28 independent lines of sight (~25% of the total planned) to search for z>7 galaxies using a combination of Lyman break and photometric redshift selections. From an effective comoving volume of (5-25) $times 10^5$ Mpc$^3$ for magnitudes brighter than $m_{AB}=26.5-24.0$ in the $H_{160}$-band respectively, we find five galaxy candidates at z~8.3-10 detected at high confidence (S/N>8), including a source at z~8.4 with mAB=24.5 (S/N~22), which, if confirmed, would be the brightest galaxy identified at such early times (z>8). In addition, BoRG[z9-10] data yield four galaxies with $7.3 \lesssim z \lesssim 8$. These new Lyman break galaxies with m$\lesssim26.5$ are ideal targets for follow-up observations from ground and space based observatories to help investigate the complex interplay between dark matter growth, galaxy assembly, and reionization.
description: Accepted for publication on ApJ. 21 pages, 11 figures, 4 tables
NIKA 150 GHz polarization observations of the Crab nebula and its spectral energy distribution
Creators: name: Ritacco, A.
name: Pérez, J. F. Macías
name: Ponthieu, N.
name: Adam, R.
name: Ade, P.
name: André, P.
name: Aumont, J.
name: Beelen, A.
name: Benoît, A.
name: Bideaud, A.
name: Billot, N.
name: Bourrion, O.
name: Bracco, A.
name: Calvo, M.
name: Catalano, A.
name: Coiffard, G.
name: Comis, B.
name: D'Addabbo, A.
name: De Petris, M.
name: Désert, F. X.
name: Doyle, S.
name: Goupy, J.
name: Kramer, C.
name: Lagache, G.
name: Leclercq, S.
name: Lestrade, J. F.
name: Mauskopf, P.
name: Mayet, F.
name: Maury, A.
name: Monfardini, A.
name: Pajot, F.
name: Pascale, E.
name: Perotto, L.
name: Pisano, G.
name: Iglesias, M. Rebolo
name: Revéret, V.
name: Rodriguez, L.
name: Romero, C.
name: Roussel, H.
name: Ruppin, F.
name: Schuster, K.
name: Sievers, A.
name: Siringo, G.
name: Thum, C.
name: Triqueneaux, S.
name: Tucker, C.
name: Wiesemeyer, H.
name: Zylka, R.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: The Crab nebula is a supernova remnant exhibiting a highly polarized synchrotron radiation at radio and millimeter wavelengths. It is the brightest source in the microwave sky with an extension of 7 by 5 arcminutes and commonly used as a standard candle for any experiment which aims at measuring the polarization of the sky. Though its spectral energy distribution has been well characterized in total intensity, polarization data are still lacking at millimetre wavelengths. We report in this paper high resolution (18 arcsec FWHM) observations of the Crab nebula in total intensity and linear polarization at 150 GHz with the NIKA camera. NIKA, operated at the IRAM 30 m telescope from 2012 to 2015, is a camera made of Lumped Element Kinetic Inductance Detectors (LEKIDs) observing the sky at 150 and 260 GHz. From these observations we are able to reconstruct the spatial distribution of the polarization degree and angle of the Crab nebula, which is found to be compatible with previous observations at lower and higher frequencies. Averaging across the source and using other existing data sets we find that the Crab nebula polarization angle is consistent with being constant over a wide range of frequencies with a value of -87.7$^\circ$ +- 0.3 in Galactic coordinates. We also present the first estimation of the Crab nebula spectral energy distribution polarized flux in a wide frequency range: 30-353 GHz. Assuming a single power law emission model we find that the polarization spectral index $β_{pol}$ = - 0.347 +- 0.026 is compatible with the intensity spectral index $β$ = - 0.323 +- 0.001.
description: 9 pages, 8 figures, in press, Astronomy and Astrophysics (A&A), 2018
Mechanisms by which prenatal hypoxia impairs memory consolidation in the newly hatched chick
Creators: name: Rodricks., Candice Lauren
Publisher: name: Monash University
Year: 2021

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
 Researchers can access this thesis by asking their local university, institution or public library to
 make a request on their behalf. Monash staff and postgraduate students can use the link in the References field.