cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
A bremsstrahlung gamma-ray source based on stable ionization injection of electrons into a laser wakefield accelerator
Creators: name: Döpp, A.
name: Guillaume, E.
name: Thaury, C.
name: Lifschitz, A.
name: Sylla, F.
name: Goddet, J-P.
name: Tafzi, A.
name: Iaquanello, G.
name: Lefrou, T.
name: Rousseau, P.
name: Conejero, E.
name: Ruiz, C.
name: Phuoc, K. Ta
name: Malka, V.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Accelerator Physics (physics.acc-ph)
subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: Laser wakefield acceleration permits the generation of ultra-short, high-brightness relativistic electron beams on a millimeter scale. While those features are of interest for many applications, the source remains constraint by the poor stability of the electron injection process. Here we present results on injection and acceleration of electrons in pure nitrogen and argon. We observe stable, continuous ionization-induced injection of electrons into the wakefield for laser powers exceeding a threshold of 7 TW. The beam charge scales approximately linear with the laser energy and is limited by beam loading. For 40 TW laser pulses we measure a maximum charge of almost 1 nC per shot, originating mostly from electrons of less than 10 MeV energy. The relatively low energy, the high charge and its stability make this source well-suited for applications such as non-destructive testing. Hence, we demonstrate the production of energetic radiation via bremsstrahlung conversion at 1 Hz repetition rate. In accordance with Geant4 Monte-Carlo simulations, we measure a gamma-ray source size of less than 100 microns for a 0.5 mm tantalum converter placed at 2 mm from the accelerator exit. Furthermore we present radiographs of image quality indicators.
The development of shame and guilt from late childhood to mid-adolescence
Creators: name: Watson., Shaun David
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.
Heritage Aymara bilingual in the north of Chile: evidence of a language contact situation to enrich intercultural education
Creators: name: Markovits Rojas, Jennifer Rosanna
Publisher: name: No Publisher Supplied
Year: 2023

description: The present work examined the connection between language and conceptual development, investigating whether false-belief reasoning (FBR) and source-monitoring ability (SMA) abilities within the theory of mind (ToM) framework constrained the comprehension of semantic and pragmatic knowledge (evidential scalar implicatures) encoded in the evidentiality structure (Papafragou et al., 2007). In addition, due to the nature of the linguistic background of the participant groups Spanish-dominant Aymara heritage children (HCH) and Spanish-dominant children (HCU), the current work examined whether bilingual children have an advantage in the development of the two target ToM abilities. A total of 21 HCH performed one semantic and one pragmatic Aymara evidentiality task, demonstrating that the semantic knowledge of Aymara evidentiality had a positive relationship with the acquisition of ToM abilities, as opposed to pragmatic knowledge. Regarding the development of the ToM abilities across groups, the bilingual population and 19 HCU performed two ToM tasks. The results showed that the linguistic background of the participants did not affect task results, suggesting that their ToM abilities were not constrained by their linguistic experience and promoting the idea that that the presence of an obligatory system to mark evidentiality does not increase the way that children develop Theory of Mind abilities.
Combined Electroweak and QCD Fit to HERA Data
Creators: name: Abt, I.
name: Cooper-Sarkar, A. M.
name: Foster, B.
name: Gwenlan, C.
name: Myronenko, V.
name: Turkot, O.
name: Wichmann, K.
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: A simultaneous Electroweak and QCD fit of electroweak parameters and parton distribution functions to HERA data on deep inelastic scattering is presented. The input data are neutral current and charged current inclusive cross sections measured by the H1 and ZEUS collaborations at the ep collider HERA. The polarisation of the electron beam was taken into account for the ZEUS and H1 data recorded between 2004 and 2007. Results are presented on the vector and axial-vector couplings of the Z boson to u- and d-type quarks. The values are in agreement with Standard Model predictions. The results on a_u and v_u represent the most precise measurements from a single process.
description: 16 pages, 7 figures, 2 tables
title: Η γέννηση της Ευρωπαϊκής Ένωσης, ο ευρωσκεπτικισμός και η περίπτωση Brexit
title: The conception of European Union, Euroscepticism and the case of Brexit
titleType: AlternativeTitle
Creators: name: Σιολής, Περικλής
Publisher: name: Πανεπιστήμιο Δυτικής Αττικής
Year: 2023
Subjects: Brexit
Ευρωσκεπτικισμός
Ευρωπαϊκή Ένωση
Ευρωζώνη
Ηνωμένο Βασίλειο

description: Ο ρόλος και το έργο της Ευρωπαϊκής Ένωσης έχουν δοκιμαστεί αρκετά τα τελευταία χρόνια καθώς παρατηρείται μια άνοδος του κινήματος του Ευρωσκεπτικισμού σε ορισμένα από τα κράτη-μέλη της, με αποκορύφωμα και άξιο μνείας την έξοδο του Ηνωμένου Βασιλείου από την Ευρωπαϊκή Ένωση. Η παρούσα εργασία είναι προϊόν συστηματικής μελέτης και σύνθεσης της βιβλιογραφίας που εξετάζει το Brexit και τις νέες τάσεις που έχουν δημιουργηθεί σε οικονομικό και πολιτικό επίπεδο σε αντιστοιχία με τις χώρες που βρίσκονται εκτός της Ευρωζώνης και την έντονη παρουσία των Ευρωσκεπτικιστών στην Ευρωπαϊκή Ένωση, ακριβώς τριάντα χρόνια μετά τη ιστορική Συνθήκη του Maastricht. Η περίπτωση του Brexit είναι αδιαμφισβήτητα ένα σχετικό και σύγχρονο αντικείμενο μελέτης που πρέπει να προβληματίσει το Ευρωπαικό οικοδόμημα ιδιαιτέρως, μιας και αποτελεί ένα αμφιλεγόμενο κεφάλαιο στη ζωή των Βρετανών, δεδομένης της τεράστιας ταχύτητας και του ρυθμού των εξελίξεων. Ο σκοπός της παρούσας εργασίας είναι η σύνθεση, ανάλυση και παρουσίαση του εν λόγω θέματος σε συνάρτηση με τις Ευρωπαϊκές εξελίξεις.
Optimal focusing conditions for bright spontaneous parametric down-conversion sources
Creators: name: Coccia, Lorenzo
name: Santamato, Alberto
name: Vallone, Giuseppe
name: Villoresi, Paolo
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Optimizing the brightness of a spontaneous parametric down conversion (SPDC) source is an important task for many quantum information applications. We investigate the optimal focusing conditions to maximize the number of photons produced in an SPDC process and coupled with single-mode fibers. We provide a general expression for the two-photon wavefunction, generalizing previous known results, by considering collinear and non-collinear emission. We present analytical expressions for our results in the thin crystal limit and clarify the relation between different focusing conditions already existing in the literature. Differently from what was previously reported, we show that the optimal ratio between the pump waist and the generated photons waist depends on the emission angle: It is $1/\sqrt2$ for collinear degenerate emission and approaches $1/2$ for larger collection angles. The role of spectral filters is also analyzed. We support and enrich our discussion with numerical simulations, performed for type-I SPDC in a $β$ barium borate crystal. For this type of emission, we also investigate the role of the transverse walk-off outside the thin crystal regime.
description: v1: 13 pages, 7 figures; v2, equivalent to the published version: minor changes to the discussion, added Figure 1, addes Section V-D, no changes to the results
title: Εκπαίδευση και οικονομική ανάπτυξη : πως το εκπαιδευτικό σύστημα αλληλεπιδρά στην οικονομική ανάπτυξη της κοινωνίας
title: Education and economic development : how the education system interacts in the economic development of society
titleType: AlternativeTitle
Creators: name: Καραμεσίνη, Αθηνά
Publisher: name: Πανεπιστήμιο Πειραιώς
Year: 2023
Subjects: subject: Οικονομική ανάπτυξη
subject: Παραγωγικότητα
subject: Ανθρώπινο κεφάλαιο
subject: Εκπαίδευση
subject: Οικονομική της εκπαίδευσης

description: Η εργασία αυτή έχει ως στόχο να παρουσιάσει και να ερευνήσει τις θεωρητικές μελέτες και προσεγγίσεις σχετικά με την ιστορική αναδρομή της εκπαίδευσης σε σχέση με την οικονομία. Η εκπαίδευση αποτελεί βασικό μοχλό ανάπτυξης. Καμία χώρα δεν μπορεί να επιτύχει βιώσιμη οικονομική ανάπτυξη χωρίς σημαντικές επενδύσεις στο ανθρώπινο κεφάλαιο. Η εκπαίδευση εμπλουτίζει την κατανόηση των ανθρώπων για τον εαυτό τους και τον κόσμο γύρω τους. Η εκπαίδευση βελτιώνει την ποιότητα ζωής των ανθρώπων και παρέχει ευρεία κοινωνικά οφέλη στα άτομα και τις κοινωνίες. Η εκπαίδευση αυξάνει την παραγωγικότητα και τη δημιουργικότητα των ανθρώπων και ενισχύει την επιχειρηματικότητα. Η εκπαίδευση διαδραματίζει επίσης σημαντικό ρόλο στη διασφάλιση της οικονομικής και κοινωνικής προόδου και στη βελτίωση της κατανομής του εισοδήματος.
Nitric oxide as an enteric neurotransmitter
Creators: name: Watson., Michael John
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.
Nonlocal Effects in Black Body Radiation
Creators: name: Bremm, G. N.
name: Falciano, F. T.
Publisher: name: arXiv
Year: 2016
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Classical Physics (physics.class-ph)
subject: FOS: Physical sciences

description: Nonlocal electrodynamics is a formalism developed to include nonlocal effects in the measurement process caused by the non-inertial state of the observers. This theory modifies Maxwell's electrodynamics by eliminating the hypothesis of locality that assumes an accelerated observer simultaneously equivalent to a comoving inertial frame of reference. In this scenario, the transformation between an inertial and accelerated observer is generalized which affects the properties of physical fields. In particular, we analyze how an uniformly accelerated observer perceives a homogeneous and isotropic blackbody radiation. We show that all nonlocal effects are transient and most relevant in the first period of acceleration.
description: 10 pages, 5 figures
Generalized Quantum Statistics and Lie (Super)Algebras
Creators: name: Stoilova, N. I.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Mathematical Physics (math-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Generalized quantum statistics, such as paraboson and parafermion statistics, are characterized by triple relations which are related to Lie (super)algebras of type B. The correspondence of the Fock spaces of parabosons, parafermions as well as the Fock space of a system of parafermions and parabosons to irreducible representations of (super)algebras of type B will be pointed out. Example of generalized quantum statistics connected to the basic classical Lie superalgebra B(1|1)=osp(3|2) with interesting physical properties, such as noncommutative coordinates, will be given. Therefore the article focuses on the question, addressed already in 1950 by Wigner: do the equation of motion determine the quantum mechanical commutation relation?
description: Contribution for the 9th International Physics Conference of the Balkan Physical Union (Istanbul, 2015)
The phosphatidylinositol 3,4,5-trisphosphate-dependent Rac exchanger, P-REX1 regulates macropinocytosis and neurite differentiation
Creators: name: Waters., JoAnne Elizabeth
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.
Variational Study of $λ$- and $N$-Atomic Configurations Interacting with an Electromagnetic Field of $2$ Modes
Creators: name: Cordero, S.
name: Castaños, O.
name: López-Peña, R.
name: Nahmad-Achar, E.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: A study of the $λ$- and $N$-atomic configurations under dipolar interaction with $2$ modes of electromagnetic radiation is presented. The corresponding quantum phase diagrams are obtained by means of a variational procedure. Both configurations exhibit normal and collective (super-radiant) regimes. While the latter in the $λ$-configuration divides itself into $2$ subregions, corresponding to each of the modes, that in the $N$-configuration may be divided into $2$ or $3$ subregions depending on whether the field modes divide the atomic system into $2$ separate subsystems or not. Our variational procedure compares well with the exact quantum solution. The properties of the relevant field and matter observables are obtained.
description: 8 pages, 7 figures, 4 tables
The role of electron correlations in the electronic structure of putative Chern magnet TbMn$_6$Sn$_6$
Creators: name: Annaberdiyev, Abdulgani
name: Mandal, Subhasish
name: Mitas, Lubos
name: Krogel, Jaron T.
name: Ganesh, Panchapakesan
Publisher: name: arXiv
Year: 2023
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Chemical Physics (physics.chem-ph)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: A member of the RMn$_6$Sn$_6$ rare-earth family materials, TbMn$_6$Sn$_6$, recently showed experimental signatures of the realization of a quantum-limit Chern magnet. In this work, we use quantum Monte Carlo (QMC) and density functional theory with Hubbard $U$ (DFT$+U$) calculations to examine the electronic structure of TbMn$_6$Sn$_6$. To do so, we optimize accurate, correlation-consistent pseudopotentials for Tb and Sn using coupled-cluster and configuration-interaction (CI) methods. We find that DFT$+U$ and single-reference QMC calculations suffer from the same overestimation of the magnetic moments as meta-GGA and hybrid density functional approximations. Our findings point to the need for improved orbitals/wavefunctions for this class of materials, such as natural orbitals from CI, or for the inclusion of multi-reference effects that capture the static correlations for an accurate prediction of magnetic properties. DFT$+U$ with Mn magnetic moments adjusted to experiment predict the Dirac crossing in bulk to be close to the Fermi level, within $\sim 120$ meV, in agreement with the experiments. Our non-stoichiometric slab calculations show that the Dirac crossing approaches even closer to the Fermi level, suggesting the possible realization of Chern magnetism in this limit.
description: This is the peer-reviewed, accepted version of the manuscript. 17 pages, 10 figures. https://doi.org/10.1038/s41535-023-00583-6
Daily social stressors as criteria for measuring client response to mental health services
Creators: name: Waryszak., Zbigniew
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.
Invariance of the Cuntz splice
Creators: name: Eilers, Søren
name: Restorff, Gunnar
name: Ruiz, Efren
name: Sørensen, Adam P. W.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Operator Algebras (math.OA)
subject: FOS: Mathematics
subject: 46L35, 46L80, 46L55, 37B10

description: We show that the Cuntz splice induces stably isomorphic graph $C^*$-algebras.
description: Our arguments to prove invariance of the Cuntz splice for unital graph C*-algebras in arXiv:1505.06773 applied with only minor changes in the general case. Since most of the results of that preprint have since been superseded by other forthcoming work, we do not intend to publish it, whereas this work is intended for publication. arXiv admin note: substantial text overlap with arXiv:1505.06773
Temporal signatures of the Cherenkov light induced by extensive air showers of cosmic rays detected with the Yakutsk array
Creators: name: Ivanov, A. A.
name: Timofeev, L. V.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: We analyze temporal characteristics of signals from the wide field-of-view (WFOV) Cherenkov telescope (CT) detecting extensive air showers (EAS) of cosmic rays (CR) in coincidence with surface detectors of the Yakutsk array. Our aim is to reveal causal relationships between measured characteristics and physical properties of EAS.
description: Preprint of an article submitted for consideration in IJMPD \c{opyright} 2016 [copyright World Scientific Publishing Company] http://www.worldscientific.com/worldscinet/ijmpd
The para-HK/QK correspondence
Creators: name: Dyckmanns, Malte
name: Vaughan, Owen
Publisher: name: arXiv
Year: 2016
Subjects: subject: Differential Geometry (math.DG)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: We generalise the hyper-Kahler/quaternionic Kahler (HK/QK) correspondence to include para-geometries, and present a new concise proof that the target manifold of the HK/QK correspondence is quaternionic Kahler. As an application, we construct one-parameter deformations of the temporal and Euclidean supergravity c-map metrics and show that they are para-quaternionic Kahler.
description: 26 pages
Evolution of the thermodynamic properties and inelastic neutron scattering intensities for spin-1/2 antiferromagnetic quantum rings
Creators: name: Haraldsen, J. T.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: This study examines the increasing complexity in the magnetic properties of small $n$ = 3, 4, 5, 6 spin-1/2 quantum rings. Using an exact diagonalization of the isotropic Heisenberg Hamiltonian with nearest and next-nearest neighbor interactions, the energy eigenstates, magnetic specific heat capacity, magnetic susceptibility, and inelastic neutron scattering structure factors are determined for variable next-nearest neighbor interactions. Here, it is shown that the presence of a complex spin-mixing, multiple ground states, and non-zero ground states greatly complicate the spin Hamiltonian. Overall, the energy eigenstates and structure factor intensities are presented in closed form, while the thermodynamic properties detail the effect of a crossing interaction in the rings. The goal of this work is to provide insight into the evolution of the magnetic properties and spin excitations within these systems.
description: 10 pages, 6 figures, 3 tables, Submitted for publication
The characteristics of those who utter threats to kill and the association between threats and physical violence
Creators: name: Warren., Lisa J.
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.
Decentralized Stochastic Optimal Power Flow in Radial Networks with Distributed Generation
Creators: name: Bazrafshan, Mohammadhafez
name: Gatsis, Nikolaos
Publisher: name: arXiv
Year: 2016
Subjects: subject: Systems and Control (eess.SY)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: This paper develops a power management scheme that jointly optimizes the real power consumption of programmable loads and reactive power outputs of photovoltaic (PV) inverters in distribution networks. The premise is to determine the optimal demand response schedule that accounts for the stochastic availability of solar power, as well as to control the reactive power generation or consumption of PV inverters adaptively to the real power injections of all PV units. These uncertain real power injections by PV units are modeled as random variables taking values from a finite number of possible scenarios. Through the use of second order cone relaxation of the power flow equations, a convex stochastic program is formulated. The objectives are to minimize the negative user utility, cost of power provision, and thermal losses, while constraining voltages to remain within specified levels. To find the global optimum point, a decentralized algorithm is developed via the alternating direction method of multipliers that results in closed-form updates per node and per scenario, rendering it suitable to implement in distribution networks with large number of scenarios. Numerical tests and comparisons with an alternative deterministic approach are provided for typical residential distribution networks that confirm the efficiency of the algorithm.
description: Journal paper accepted at the IEEE Transactions on Smart Grid
Three-Dimensional Multi-Tethered Satellite Formation with the Elements Moving Along Lissajous Curves
Creators: name: Yarotsky, D.
name: Sidorenko, V.
name: Pritykin, D.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Optimization and Control (math.OC)
subject: FOS: Mathematics

description: This note presents a novel approach to maintain three-dimensional multi-tethered satellite formation in space. For a formation consisting of a main body connected by tethers with several deputy satellites (the so-called "hub-and-spoke" configuration) we demonstrate that under proper choice of the system's parameters the deputy satellites can move along Lissajous curves in the plane normal to the local vertical with all tethers stretched, the total force due to the tension forces acting on the main satellite is balanced in a way allowing it to be in relative equilibrium strictly below or strictly above the system's center of mass. We analyze relations between the system's essential parameters and obtain conditions under which the proposed motion does take place. We also study analytically the motion stability for different configurations and whether the deputy satellites can collide or the tethers can entangle. Our theoretical findings are corroborated and validated by numerical experiments.
description: 28 pages, video of stable motion: https://youtu.be/62vSml6nXws
Hamiltonian Extrema of an Arbitrary Flux-Biased Josephson Circuit
Creators: name: Miano, A.
name: Joshi, V. R.
name: Liu, G.
name: Dai, W.
name: Parakh, P. D.
name: Frunzio, L.
name: Devoret, M. H.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Flux-biased loops including one or more Josephson junctions are ubiquitous elements in quantum information experiments based on superconducting circuits. These quantum circuits can be tuned to implement a variety of Hamiltonians, with applications ranging from decoherence-protected qubits to quantum limited converters and amplifiers. The extrema of the Hamiltonian of these circuits are of special interest because they govern their low-energy dynamics. However, the theory of superconducting quantum circuits so far lacks a systematic method to find these extrema and compute the series expansion of the Hamiltonian in their vicinity for an arbitrary nonlinear superconducting circuit. We present such a method, which can aid the synthesis of new functionalities in quantum devices.
Nanopatterning process based on epitaxial masking for the fabrication of electronic and spintronic devices made of La0.67Sr0.33MnO3/LaAlO3/SrTiO3 heterostructures with in situ interfaces
Creators: name: Telesio, Francesca
name: Pellegrino, Luca
name: Pallecchi, Ilaria
name: Marré, Daniele
name: Esposito, Emanuela
name: di Gennaro, Emiliano
name: Khare, Amit
name: Granozio, Fabio Miletto
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The fabrication of oxide electronics devices is presently hindered by the lack of standardized and well established patterning procedures, applicable down to the nanoscale. In this work, the authors propose a procedure to obtain patterns with resolution around 100 nm on (La,Sr)MnO3/LaAlO3/SrTiO3 heterostructures. Our method is based on a multistep technique, which includes wet and dry etching, epitaxial masking, and e-beam lithography. Our procedure is devised to define independent patterns on the interfacial two dimensional electron gas and on the metallic top electrode, while preserving an all-in situ approach for the heterostructure growth. The authors show results on nano-scale devices based on (La,Sr)MnO3/LaAlO3/SrTiO3, suitable for oxide spintronics applications.
Defragmentation-as-a-Service (DaaS): How beneficial is it?
Creators: name: Singh, Sandeep Kumar
name: Bziuk, Wolfgang
name: Jukan, Admela
Publisher: name: arXiv
Year: 2016
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: We analyze Defragmentation-as-a-Service (DaaS) in elastic optical networks and show that the positive effect of defragmentation depends on the rate at which it is performed, load (or, call arrival rates) and the available resources.
Mapping chiral symmetry breaking in the excited baryon spectrum
Creators: name: Bicudo, Pedro
name: Cardoso, Marco
name: Llanes-Estrada, Felipe J.
name: Van Cauteren, Tim
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study the conjectured "Insensitivity to Chiral Symmetry Breaking" in the highly excited light baryon spectrum. While the experimental spectrum is being measured at JLab and CBELSA/TAPS, this insensitivity remains to be computed theoretically in detail. As the only existing option to have both confinement, highly excited states and chiral symmetry, we adopt the truncated Coulomb gauge formulation of QCD, considering a linearly confining Coulomb term. Adopting a systematic and numerically intensive variational treatment up to 12 harmonic oscillator shells we are able to access several angular and radial excitations. We compute both the excited spectra of $I=1/2$ and $I=3/2$ baryons, up to large spin $J=13/2$, and study in detail the proposed chiral multiplets. While the static-light and light-light spectra clearly show chiral symmetry restoration high in the spectrum, the realization of chiral symmetry is more complicated in the baryon spectrum than earlier expected.
description: 22 pages, 16 figures, submitted to Phys. Rev. D
Mass generation and the problem of seagull divergences
Creators: name: Figueiredo, C. T.
name: Aguilar, A. C.
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The gluon mass generation is a purely non-perturbative effect, and the natural framework to study it in the continuum are the Schwinger-Dyson equations (SDEs) of the theory. At the level of the SDEs the generation of such a mass is associated with the existence of infrared finite solutions for the gluon propagator. From the theoretical point of view, the dynamical gluon mass generation has been traditionally plagued with seagull divergences. In this work, we will review how such divergences can be eliminated completely by virtue of a characteristic identity, valid in dimensional regularization. As a pedagogical example, we will first discuss in the context of scalar QED how it is possible to eliminate all seagull divergences, by triggering the aforementioned special identity, which enforces the masslessness of the photon. Then, we will discuss what happens in QCD and present an Ansatz for the three gluon vertex, which completely eliminates all seagull divergences and at same time allows for the possibility of a dynamical gluon mass generation.
description: Proceedings of the Workshop "XIII International Workshop on Hadron Physics", 22-27 March 2015, Angra dos Reis - RJ, Brazil. 8 pages, 4 figures
Effects of streptozotocin-induced diabetes mellitus on some aspects of intracellular calcium, contractility and metabolism in smooth muscle of rat urinary bladder
Creators: name: Waring., Joanne Valmai
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.
On the Feasibility of Characterizing Free-floating Planets with Current and Future Space-based Microlensing Surveys
Creators: name: Henderson, Calen B.
name: Shvartzvald, Yossi
Publisher: name: arXiv
Year: 2016
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Simultaneous space- and ground-based microlensing surveys, such as K2's Campaign 9 (K2C9) and $WFIRST$, facilitate measuring the masses and distances of free-floating planet (FFP) candidates. FFPs are identified as single-lens events with a short timescale, of-order 1 day. Measuring the mass of the lensing object requires determining the finite size of the source star $ρ$, as well as the microlens parallax $π_{\rm E}$. A planet that is bound to but widely separated from a host star can produce a light curve similar to that of an FFP. This tension can be resolved with high-resolution imaging of the microlensing target to search for the lens flux $F_l$ from a possible host star. Here we investigate the accessible parameter space for each of these components --- $π_{\rm E}$, $ρ$, and $F_l$ --- considering different satellites for a range of FFP masses, Galactic distances, and source star properties. We find that at the beginning of K2C9, when its projected separation from the Earth (as viewed from the center of its survey field) is $\lesssim$0.2 AU, it will be able to measure $π_{\rm E}$ for Jupiter-mass FFP candidates at distances larger than $\sim$2 kpc and to Earth-mass lenses at $\sim$8 kpc. At the end of its campaign, when $D_\perp = 0.81$ AU, it is sensitive to planetary-mass lenses for distances $\gtrsim$3.5 kpc, and even then only to those with mass $\gtrsim$M$_{\rm Jup}$. From lens flux constraints we find that it will be possible to exclude all stellar-mass host stars (down to the deuterium-burning limit) for events within $\sim$2 kpc. Together these indicate that the ability to characterize FFPs detected during K2C9 is optimized for events occurring toward the beginning of the campaign. $WFIRST$, on the other hand, will be able to detect and characterize FFPs with masses at least as low as super-Earths throughout the Galaxy during its entire microlensing survey.
description: 12 pages, 6 figures, 1 table; submitted to ApJ
title: Ανακαίνηση καταστήματος ρουχισμού, «Ένας χώρος για εσένα», στο κατάστημα της εταιρίας BSB του πολυκαταστήματος Avenue.
title: Renovation of a clothing store, «One shop for you», in the BSB company’s store in the Avenue mall.
titleType: AlternativeTitle
Creators: name: Παναγιωτοπούλου, Σοφία
Publisher: name: Πανεπιστήμιο Δυτικής Αττικής
Year: 2023
Subjects: Fashion
Retail
Ένδυση
Κατάστημα

description: Αντικείμενο της εργασίας είναι ένα, διαφορετικό από τα συνηθισμένα, κατάστημα ρούχων το οποίο θα έχει τη δυνατότητα να προσαρμόζεται ανάλογα με τον κάθε χρήστη που εισέρχεται. Το κατάστημα έχει σκοπό να βοηθήσει και να κατατοπίσει τους χρήστες σύμφωνα με τα χαρακτηριστικά τους. Οι επισκέπτες θα σκανάρονται στην είσοδο με τη χρήση μίας τεχνολογικής εγκατάστασης και με βάση τον τύπο του σώματος και τα χρώματα τους, θα έχουν την δυνατότητα να δοκιμάσουν ρούχα που ταιριάζουν ειδικά σε αυτούς.
Design of an Energy-Aware Cartesian Impedance Controller for Collaborative Disassembly
Creators: name: Hjorth, Sebastian
name: Lamon, Edoardo
name: Chrysostomou, Dimitrios
name: Ajoudani, Arash
Publisher: name: arXiv
Year: 2023
Subjects: subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: Human-robot collaborative disassembly is an emerging trend in the sustainable recycling process of electronic and mechanical products. It requires the use of advanced technologies to assist workers in repetitive physical tasks and deal with creaky and potentially damaged components. Nevertheless, when disassembling worn-out or damaged components, unexpected robot behaviors may emerge, so harmless and symbiotic physical interaction with humans and the environment becomes paramount. This work addresses this challenge at the control level by ensuring safe and passive behaviors in unplanned interactions and contact losses. The proposed algorithm capitalizes on an energy-aware Cartesian impedance controller, which features energy scaling and damping injection, and an augmented energy tank, which limits the power flow from the controller to the robot. The controller is evaluated in a real-world flawed unscrewing task with a Franka Emika Panda and is compared to a standard impedance controller and a hybrid force-impedance controller. The results demonstrate the high potential of the algorithm in human-robot collaborative disassembly tasks.
description: 7 pages, 6 figures, presented at the 2023 IEEE International Conference on Robotics and Automation (ICRA). Video available at https://www.youtube-nocookie.com/embed/SgYFHMlEl0k
Chironomid (Insecta: Chironomidae) community structure response to hydrological changes in the mid-1950s in lake Nam Co, Tibetan Plateau
Creators: name: Echeverría-Galindo, Paula
name: Rigterink, Sonja
name: Massaferro, Julieta
name: Pérez, Liseth
name: Wünnemann, Bernd
name: Hoelzmann, Philipp
name: Kang, Wengang
name: Börner, Nicole
name: Schwarz, Anja
Publisher: name: Freie Universität Berlin
Year: 2023
Subjects: subject: chironomid
subject: Indian summer monsoon
subject: Nam Co
subject: Niya Qu
subject: nutrients
subject: runoff
subject: water level
subject: 500 Naturwissenschaften und Mathematik::550 Geowissenschaften, Geologie::550 Geowissenschaften

description: The recent rise in air temperatures detected at high altitudes of the Tibetan Plateau has accelerated glacier melt and retreat. Moreover, enhanced monsoonal precipitation has increased runoff and transport of allochthonous material to the lakes. Consequently, water levels are rising, modifying the spatial distribution and composition of local aquatic biota. To infer these environmental and biological changes in recent decades, a 30-cm-long sediment core, representing the past ~160 years, from Nam Co, an endorheic lake, was analyzed for subfossil chironomid assemblages and sediment geochemistry. In total, 25 chironomid morphotypes were identified. Nineteen were considered as non-rare taxa (abundances ≥2%) and six as rare taxa (abundances <2%). Since 1956 ce, higher chironomid richness (S = 19) is evident compared to the previous 100 years. The simultaneous decrease in the abundance of profundal Micropsectra radialis-type and increase of both Chironomus and Procladius, taxa adapted to more eurytopic and slightly warmer water bodies, indicate increasing water temperatures and intensified primary productivity. The dominance of littoral chironomid assemblages reflects increasing lake water levels, flooded shorelines and expansion of littoral areas driven by increased precipitation and glacial meltwater input both resulting from the increase in air temperatures. This scenario is confirmed by increases in total nitrogen and Zr/Rb ratios, indicating higher productivity and coarser grain size as a consequence of increased runoff via the Niya Qu. These hydrological changes have resulted in a positive water balance that can be linked to an increase in moisture supply from the Indian summer monsoon and glacier melt, reflecting increasing temperatures and precipitation since 1956 ce, ultimately driven by anthropogenic warming.
Anisotropic Hardy-Lorentz Spaces and Their Applications
Creators: name: Liu, Jun
name: Yang, Dachun
name: Yuan, Wen
Publisher: name: arXiv
Year: 2015
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: Primary 42B35, Secondary 46E30, 42B25, 42B20

description: Let $p\in(0,1]$, $q\in(0,\infty]$ and $A$ be a general expansive matrix on $\mathbb{R}^n$. The authors introduce the anisotropic Hardy-Lorentz space $H^{p,q}_A(\mathbb{R}^n)$ associated with $A$ via the non-tangential grand maximal function and then establish its various real-variable characterizations in terms of the atomic or the molecular decompositions, the radial or the non-tangential maximal functions, or the finite atomic decompositions. All these characterizations except the $\infty$-atomic characterization are new even for the classical isotropic Hardy-Lorentz spaces on $\mathbb{R}^n$. As applications, the authors first prove that $H^{p,q}_A(\mathbb{R}^n)$ is an intermediate space between $H^{p_1,q_1}_A(\mathbb{R}^n)$ and $H^{p_2,q_2}_A(\mathbb{R}^n)$ with $0
description: 68 pages; submitted
Unitarity methods for Mellin moments of Drell-Yan cross sections
Creators: name: Bonocore, Domenico
name: Laenen, Eric
name: Rietkerk, Robbert
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We develop a method for computing Mellin moments of single inclusive cross sections such as Drell-Yan production directly from forward scattering diagrams, by invoking unitarity in the form of cutting equations. We provide a diagram-independent prescription for eliminating contributions from unwanted cuts at the level of an expansion in the reciprocal omega=1/z variable. The modified sum over powers of omega produces the result from physical cuts only, with the nth coefficient precisely equal to the nth Mellin moment of the cross section. We demonstrate and validate our method for representative one- and two-loop diagrams.
description: 37 pages with 13 figures
Non-adiabatic geometric phases and dephasing in an open quantum system
Creators: name: Svetogorov, A. E.
name: Makhlin, Yu.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Physics (quant-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We analyze the influence of a dissipative environment on geometric phases in a quantum system subject to non-adiabatic evolution. We find dissipative contributions to the acquired phase and modification of dephasing, considering the cases of weak short-correlated noise as well as of slow quasi-stationary noise. Motivated by recent experiments, we find the leading non-adiabatic corrections to the results, known for the adiabatic limit.
Liouville integrability and superintegrability of a generalized Lotka-Volterra system and its Kahan discretization
Creators: name: Kouloukas, Theodoros E.
name: Quispel, G. R. W.
name: Vanhaecke, Pol
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mathematical Physics (math-ph)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences
subject: 37J35, 39A22

description: We prove the Liouville and superintegrability of a generalized Lotka-Volterra system and its Kahan discretization.
description: 14 pages
First-order superfluid to valence bond solid phase transitions in easy-plane SU($N$) magnets for small-$N$
Creators: name: D'Emidio, Jonathan
name: Kaul, Ribhu K.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We consider the easy-plane limit of bipartite SU($N$) Heisenberg Hamiltonians which have a fundamental representation on one sublattice and the conjugate to fundamental on the other sublattice. For $N=2$ the easy plane limit of the SU(2) Heisenberg model is the well known quantum XY model of a lattice superfluid. We introduce a logical method to generalize the quantum XY model to arbitrary $N$, which keeps the Hamiltonian sign-free. We show that these quantum Hamiltonians have a world-line representation as the statistical mechanics of certain tightly packed loop models of $N$-colors in which neighboring loops are disallowed from having the same color. In this loop representation we design an efficient Monte Carlo cluster algorithm for our model. We present extensive numerical results for these models on the two dimensional square lattice, where we find the nearest neighbor model has superfluid order for $N\leq 5$ and valence-bond order for $N> 5$. By introducing SU($N$) easy-plane symmetric four-spin couplings we are able to tune across the superfluid-VBS phase boundary for all $N\leq 5$. We present clear evidence that this quantum phase transition is first order for $N=2$ and $N=5$, suggesting that easy-plane deconfined criticality runs away generically to a first order transition for small-$N$.
description: 8 pages, 8 figures, 1 table
Constraining Globular Cluster Age Uncertainties Using the IR Color-Magnitude Diagram
Creators: name: Correnti, Matteo
name: Gennaro, Mario
name: Kalirai, Jason S.
name: Brown, Thomas M.
name: Calamida, Annalisa
Publisher: name: arXiv
Year: 2016
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Globular Clusters (GCs) in the Milky Way are the primary laboratories for establishing the ages of the oldest stellar populations and for measuring the color-magnitude relation of stars. In infrared (IR) color-magnitude diagrams (CMDs), the stellar main sequence (MS) exhibits a "kink", due to opacity effects in M dwarfs, such that lower mass and cooler dwarfs become bluer in the IR color baseline. This diagnostic offers a new opportunity to model GC CMDs and to reduce uncertainties on cluster properties (e.g., their derived ages). In this context, we analyzed Hubble Space Telescope Wide Field Camera 3 IR archival observations of four GCs - 47Tuc, M4, NGC2808, and NGC6752 - for which the data are deep enough to fully sample the low-mass MS, reaching at least ~ 2 mag below the "kink". We derived the fiducial lines for each cluster and compared them with a grid of isochrones over a large range of parameter space, allowing age, metallicity, distance, and reddening to vary within reasonable selected ranges. The derived ages for the four clusters are respectively 11.6, 11.5, 11.2, and 12.1 Gyr and their random uncertainties are σ~ 0.7 - 1.1 Gyr. Our results suggest that the near-IR MS "kink", combined with the MS turn-off, provides a valuable tool to measure GC ages and offers a promising opportunity to push the absolute age of GCs to sub-Gyr accuracy with the next generation IR telescopes such as the James Webb Space Telescope and the Wide-Field Infrared Survey Telescope.
description: 16 pages in emulateapj LaTeX style, incl. 10 figures (low res.), 4 tables. Accepted for publication in ApJ
title: Multiple interfaces
title: Social media, religious politics, and national (un)belonging in India and the diaspora
titleType: Subtitle
Creators: name: Udupa, Sahana
name: Kramer, Max
Publisher: name: Freie Universität Berlin
Year: 2023
Subjects: subject: India
subject: Indian diaspora
subject: Islamophobia
subject: majoritarian nationalism
subject: religious politics
subject: social media
subject: 300 Sozialwissenschaften::300 Sozialwissenschaften, Soziologie::301 Soziologie, Anthropologie

description: In India and its diaspora in the UK, online activities of various sorts—tweeting, blogging, messaging, trolling, and tagging—have become central to tensions surrounding religion's presence in public life and the stakes of belonging to the nation. Three clusters of social media practices undergird these digital mediations: piety, surveillance, and fun. Such practices reveal how internet-enabled mediations reenergize religion as a political category of difference under majoritarian right-wing regimes and the transnational context of Islamophobia, while also offering distinct possibilities for imagining politics through the pleasures, visibilities, and reflections induced by digital circulations. Rather than approaching the internet as an abstract technological context or discrete channels for communication, this analysis theoretically positions it as an arena of “multiple interfaces.” It signals contiguities and collisions that digital practice has opened up among the very real communities and structures of authority, under conditions shaped by longer colonial histories.
Transport dynamics of ultracold atoms in a triple-well transistor-like potential
Creators: name: Caliga, Seth C.
name: Straatsma, Cameron J. E.
name: Anderson, Dana Z.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: The transport of atoms is experimentally studied in a transistor-like triple-well potential consisting of a narrow gate well surrounded by source and drain wells. Atoms are initially loaded into the source well with pre-determined temperature and chemical potential. Energetic atoms flow from the source, across the gate, and into the drain where they are removed using a resonant light beam. The manifestation of atom-atom interactions and dissipation is evidenced by a rapid population growth in the initially vacant gate well. The transport dynamics are shown to depend strongly on a feedback parameter determined by the relative heights of the two barriers forming the gate region. For a range of feedback parameter values, experiments establish that the gate atoms develop a larger chemical potential and lower temperature than those in the source.
description: 13 pages, 5 figures, accepted for publication in NJP
Quantum and classical probability distributions for arbitrary Hamiltonian
Creators: name: Semay, Claude
name: Ducobu, Ludovic
Publisher: name: arXiv
Year: 2015
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In the limit of large quantum excitations, the classical and quantum probability distributions for a Schrödinger equation can be compared by using the corresponding WKBJ solutions whose rapid oscillations are averaged. This result is extended for one-dimensional Hamiltonians with a non-usual kinetic part. The validity of the approach is tested with a Hamiltonian containing a relativistic kinetic energy operator.