cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Kibble-Zurek scaling due to environment temperature quench in the transverse field Ising model
Creators: name: Bácsi, Á.
name: Dóra, B.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: The Kibble-Zurek mechanism describes defect production due to non-adiabatic passage through a critical point. Here we study its variant from ramping the environment temperature to a critical point. We find that the defect density scales as $τ^{-dν}$ or $τ^{-d/z}$ for thermal or quantum critical points, respectively, in terms of the usual critical exponents and $1/τ$ the speed of the drive. Both scalings describe reduced defect density compared to conventional Kibble-Zurek mechanism, which stems from the enhanced relaxation due to bath-system interaction. Ramping to the quantum critical point is investigated by studying the Lindblad equation for the transverse field Ising chain in the presence of thermalizing bath, with couplings to environment obeying detailed balance, confirming the predicted scaling. The von-Neumann or the system-bath entanglement entropy follows the same scaling. Our results are generalized to a large class of dissipative systems with power-law energy dependent bath spectral densities as well.
description: 13 pages, 6 figures
INTERPRETAÇÃO EXTENSIVA E O ATIVISMO JUDICIAL NO DIREITO PENAL
Creators: name: Washington Batista BRITO
name: Julia Feitosa COSTA
Publisher: name: Zenodo
Year: 2024
Subjects: Ativismo judicial
Intervenção dos juízes
Promoção de justiça social
Separação dos poderes
Legalidade penal

description: RESUMO

O ativismo judicial no direito penal trata-se à postura mais proativa e interveniente dos juízes na interpretação e aplicação das leis penais. Isso ocorre quando os magistrados extrapolam seu papel tradicional de apenas aplicar a lei, passando a interpretá-la de forma mais ampla e a exercer um papel mais ativo na proteção de direitos fundamentais e na promoção de justiça social. Por exemplo, na criação de teses jurídicas inovadoras para proteger direitos individuais, gerando debates e controvérsias, pois alguns argumentam que ele pode levar a uma judicialização excessiva da política criminal, é importante encontrar um equilíbrio entre a atuação judicial ativa e o respeito aos limites estabelecidos pela separação dos poderes e pela legalidade penal. Trazendo consigo vem o amplo aspecto da interpretação extensiva uma ferramenta frequentemente utilizada para ampliar o alcance das normas penais, a fim de adequá-las às demandas da sociedade e aos valores constitucionais, consiste em estender o alcance de uma norma além do seu sentido literal, buscando abranger situações não explicitamente previstas, mas que se enquadram na finalidade da norma.
Developing records and archives curriculum standards for Zambia :
Creators: name: Masempela-Ng'andu, Joyce.
Publisher: name: Monash University
Year: 2022

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.
DeeP-LCC: Data-EnablEd Predictive Leading Cruise Control in Mixed Traffic Flow
Creators: name: Wang, Jiawei
name: Zheng, Yang
name: Li, Keqiang
name: Xu, Qing
Publisher: name: arXiv
Year: 2022
Subjects: subject: Systems and Control (eess.SY)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: For the control of connected and autonomous vehicles (CAVs), most existing methods focus on model-based strategies. They require explicit knowledge of car-following dynamics of human-driven vehicles that are non-trivial to identify accurately. In this paper, instead of relying on a parametric car-following model, we introduce a data-driven non-parametric strategy, called DeeP-LCC (Data-EnablEd Predictive Leading Cruise Control), to achieve safe and optimal control of CAVs in mixed traffic. We first utilize Willems' fundamental lemma to obtain a data-centric representation of mixed traffic behavior. This is justified by rigorous analysis on controllability and observability properties of mixed traffic. We then employ a receding horizon strategy to solve a finite-horizon optimal control problem at each time step, in which input/output constraints are incorporated for collision-free guarantees. Numerical experiments validate the performance of DeeP-LCC compared to a standard predictive controller that requires an accurate model. Multiple nonlinear traffic simulations further confirm its great potential on improving traffic efficiency, driving safety, and fuel economy.
description: 16 pages, 8 figures. arXiv admin note: text overlap with arXiv:2110.10097
title: Reward-related learning and individual differences
Creators: name: Pesola, Francesca
Publisher: name: Goldsmiths, University of London
Year: 2008

description: The thesis explored the impact of personality on performance during category learning (CL) tasks, following motivational and reinforcing manipulations. In particular, the thesis explored how motivation and reinforcement affect performance during category learning tasks and, concurrently, the research aspired to clarify how reward sensitivity is modulated by individual differences in personality. According to findings which indicate that dopamine (DA) plays an important role in reward-based learning (Schultz, 1998; 2002), personality traits which may have a DAergic basis were considered. The thesis makes broad reference to the Reinforcement Sensitivity Theory (RST; Gray and McNaughton, 2000) and, in particular, to the Behavioural Activation System (BAS). Indeed, the BAS is believed to involve DAergic midbrain projections and be sensitive to rewards (Pickering and Gray, 2001). Therefore, the personality traits underlying the BAS are believed to have a DAergic nature and, subsequently, determine inter-individual variations in reward sensitivity. A series of behavioural experiments were conducted to explore the relationship between motivation and personality during CL tasks. Moreover, a biologically inspired model was developed to simulate the behavioural data and capture individual differences. The model had a DAergic basis that represented some of the biological mechanisms that underlie procedural learning and that may occur within brain structures thought to be part of the BAS (Gray, 1987). The model was shown to be a useful tool to obtain further insights into the experimental data. Impulsivity was found to mediate procedural learning in a series of studies. Thus according to RST (Gray, 1987), the present research shows that impulsivity might represent the underlying BAS trait. However, contrary to RST, the model indicated that inter-individual variations in procedural learning were dependent on individual's sensitivity to reward prediction error (RPE) signals rather than rewards per se. Finally, the model simulations suggest that category learning under asymmetric payoffs is mediated by both explicit and implicit (i.e. procedural) processes. The implications of these findings are discussed in light of personality theories and in relation to future studies.
Flux density monitoring of 89 millisecond pulsars with MeerKAT
Creators: name: Gitika, P.
name: Bailes, M.
name: Shannon, R. M.
name: Reardon, D. J.
name: Cameron, A. D.
name: Shamohammadi, M.
name: Miles, M. T.
name: Flynn, C. M. L.
name: Corongiu, A.
name: Kramer, M.
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We present a flux density study of 89 millisecond pulsars (MSPs) regularly monitored as part of the MeerKAT Pulsar Timing Array (MPTA) using the L-Band receiver with an approximately two week cadence between 2019-2022. For each pulsar, we have determined the mean flux densities at each epoch in eight $\sim$97 MHz sub-bands ranging from 944 to 1625 MHz. From these we have derived their modulation indices, their average and peak-to-median flux densities in each sub-band, as well as their mean spectral indices across the entire frequency range. We find that the vast majority of the MSPs have spectra that are well described by a simple power law, with a mean spectral index of -1.86(6). Using the temporal variation of the flux densities we measured the structure functions and determined the refractive scintillation timescale for seven. The structure functions provide strong evidence that the intrinsic radio luminosities of MSPs are stable. As a population, the average modulation index at 20 cm wavelengths peaks near unity at dispersion measures (DMs) of $\sim$20 pc cm$^{-3}$ and by a DM of 100 pc cm$^{-3}$ are closer to 0.2, due to refractive scintillation. We find that timing arrays can improve their observing efficiency by reacting to scintillation maxima, and that 20 cm FRB surveys should prioritise highly scintillating mid-latitude regions of the Galactic sky where they will find $\sim$30% more events and bursts at greater distances.
description: 16 pages, 8 figures, accepted for publication in MNRAS
Jet-induced molecular gas excitation and turbulence in the Teacup
Creators: name: Audibert, A.
name: Almeida, C. Ramos
name: García-Burillo, S.
name: Combes, F.
name: Bischetti, M.
name: Meenakshi, M.
name: Mukherjee, D.
name: Bicknell, G.
name: Wagner, A. Y.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: In order to investigate the impact of radio jets on the interstellar medium (ISM) of galaxies hosting active galactic nuclei (AGN), we present subarcsecond resolution Atacama Large Millimeter/submillimeter Array (ALMA) CO(2-1) and CO(3-2) observations of the Teacup galaxy. This is a nearby ($D_{\rm L}$=388 Mpc) radio-quiet type-2 quasar (QSO2) with a compact radio jet ($P_{\rm jet}\approx$10$^{43}$ erg s$^{-1}$) that subtends a small angle from the molecular gas disc. Enhanced emission line widths perpendicular to the jet orientation have been reported for several nearby AGN for the ionised gas. For the molecular gas in the Teacup, not only do we find this enhancement in the velocity dispersion but also a higher brightness temperature ratio (T32/T21) perpendicular to the radio jet compared to the ratios found in the galaxy disc. Our results and the comparison with simulations suggest that the radio jet is compressing and accelerating the molecular gas, and driving a lateral outflow that shows enhanced velocity dispersion and higher gas excitation. These results provide further evidence that the coupling between the jet and the ISM is relevant to AGN feedback even in the case of radio-quiet galaxies.
description: 9 pages, 8 figures. Accepted for publication in A&A Letters
Ein anderes Stück Europa?
Creators: name: Hertel, Patricia
Publisher: name: Leipziger Universitätsverlag
Year: 2015

description: The mass tourism of millions of Europeans towards the Mediterranean in the post-war era was made possible through the efforts of both private and governmental actors. This article explores how, why, and to what extent these experts promoted ideas of a “South” within Western Europe during the Cold War era. Evaluating different groups of tourism experts – such as tour operators, travel writers, tourism scholars, economists in international organizations, politicians, and journalists – this article identifies several discourses that expressed internal differences within Western Europe via the idea of a European “South” that belonged to Western Europe, but which was considered to be “different” at the same time. The article argues that tourism experts fostered quite contradictory ideas: on the one hand, tourism was a central field to promote the idea of a “Southern difference” and, on the other hand, tourism was used to bridge economic gaps and political conflicts within Western Europe.
description: Comparativ, Vol 25 No 3 (2015): Die Verhandlung des Westens. Wissenseliten und die Heterogenität Westeuropas nach 1945
Connectivity of the Feasible and Sublevel Sets of Dynamic Output Feedback Control with Robustness Constraints
Creators: name: Hu, Bin
name: Zheng, Yang
Publisher: name: arXiv
Year: 2022
Subjects: subject: Optimization and Control (math.OC)
subject: FOS: Mathematics

description: This paper considers the optimization landscape of linear dynamic output feedback control with $\mathcal{H}_\infty$ robustness constraints. We consider the feasible set of all the stabilizing full-order dynamical controllers that satisfy an additional $\mathcal{H}_\infty$ robustness constraint. We show that this $\mathcal{H}_\infty$-constrained set has at most two path-connected components that are diffeomorphic under a mapping defined by a similarity transformation. Our proof technique utilizes a classical change of variables in $\mathcal{H}_\infty$ control to establish a subjective mapping from a set with a convex projection to the $\mathcal{H}_\infty$-constrained set. This proof idea can also be used to establish the same topological properties of strict sublevel sets of linear quadratic Gaussian (LQG) control and optimal $\mathcal{H}_\infty$ control. Our results bring positive news for gradient-based policy search on robust control problems.
description: Submitted to L-CSS and CDC 2022
Stability of amplitude chimeras in oscillator networks
Creators: name: Tumash, L.
name: Zakharova, A.
name: Lehnert, J.
name: Just, W.
name: Schöll, E.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: FOS: Physical sciences

description: We show that amplitude chimeras in ring networks of Stuart-Landau oscillators with symmetry-breaking nonlocal coupling represent saddle-states in the underlying phase space of the network. Chimera states are composed of coexisting spatial domains of coherent and of incoherent oscillations. We calculate the Floquet exponents and the corresponding eigenvectors in dependence upon the coupling strength and range, and discuss the implications for the phase space structure. The existence of at least one positive real part of the Floquet exponents indicates an unstable manifold in phase space, which explains the nature of these states as long-living transients. Additionally, we find a Stuart-Landau network of minimum size $N=12$ exhibiting amplitude chimeras
Stability and world politics : a theoretical study of the determinants for world stability
Creators: name: Tuma, John.
Publisher: name: Monash University
Year: 2022

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.
Privacy-by-Design Framework for Assessing Internet of Things Applications and Platforms
Creators: name: Perera, Charith
name: McCormick, Ciaran
name: Bandara, Arosha K.
name: Price, Blaine A.
name: Nuseibeh, Bashar
Publisher: name: arXiv
Year: 2016
Subjects: subject: Computers and Society (cs.CY)
subject: Cryptography and Security (cs.CR)
subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences

description: The Internet of Things (IoT) systems are designed and developed either as standalone applications from the ground-up or with the help of IoT middleware platforms. They are designed to support different kinds of scenarios, such as smart homes and smart cities. Thus far, privacy concerns have not been explicitly considered by IoT applications and middleware platforms. This is partly due to the lack of systematic methods for designing privacy that can guide the software development process in IoT. In this paper, we propose a set of guidelines, a privacy-by-design framework, that can be used to assess privacy capabilities and gaps of existing IoT applications as well as middleware platforms. We have evaluated two open source IoT middleware platforms, namely OpenIoT and Eclipse SmartHome, to demonstrate how our framework can be used in this way.
description: Accepted to be published in The 6th International Conference on the Internet of Things (IoT 2016) November 7-9, 2016 in Stuttgart, Germany
High-precision chemical abundances of Galactic building blocks. II. Revisiting the chemical distinctness of the Helmi streams
Creators: name: Matsuno, Tadafumi
name: Dodd, Emma
name: Koppelman, Helmer H.
name: Helmi, Amina
name: Ishigaki, Miho N.
name: Aoki, Wako
name: Zhao, Jingkun
name: Yuan, Zhen
name: Hattori, Kohei
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Context: The Helmi streams are a kinematic substructure whose progenitor is likely a dwarf galaxy. Although 20 years have passed since their discovery, it is still unclear whether their members are chemically distinguishable from other halo stars in the Milky Way. Aim: We aim to precisely characterize the chemical properties of the Helmi streams. Methods: We analyzed high-resolution, high signal-to-noise ratio spectra for 11 Helmi stream stars through a line-by-line abundance analysis. We compared the derived abundances to homogenized literature abundances of the other halo stars, including those belonging to other kinematic substructures, such as Gaia-Enceladus and Sequoia. Results: Compared to typical halo stars, the Helmi stream members clearly show low values of [X/Fe] in elements produced by massive stars, such as Na and $α$-elements. This tendency is seen down to metallicities of at least [Fe/H]$\sim -2.2$, suggesting type~Ia supernovae already started to contribute to the chemical evolution at this metallicity. We find that the [$α$/Fe] ratio does not evolve significantly with metallicity, making the Helmi stream stars less distinguishable from Gaia-Enceladus stars at [Fe/H]$\gtrsim -1.5$. The almost constant but low value of [$α$/Fe] might be indicative of quiescent star formation with low efficiency at the beginning and bursty star formation at later times. We also find extremely low values of [Y/Fe] at low metallicity, providing further support for the claim that light neutron-capture elements are deficient in Helmi streams. While Zn is deficient at low metallicity, it shows a large spread at high metallicity. The origin of the extremely low Y abundances and Zn variations remains unclear. Conclusion: The Helmi stream stars are distinguishable from the majority of the halo stars if homogeneously derived abundances are compared.
description: Accepted version
Quiescent and active galactic nuclei as factories of merging compact objects in the era of gravitational-wave astronomy
Creators: name: Sedda, Manuel Arca
name: Naoz, Smadar
name: Kocsis, Bence
Publisher: name: arXiv
Year: 2023
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Galactic nuclei harbouring a central supermassive black hole (SMBH), possibly surrounded by a dense nuclear cluster (NC), represent extreme environments which house a complex interplay of many physical processes that uniquely affect stellar formation, evolution, and dynamics. The discovery of gravitational waves (GW) emitted by merging black holes (BHs) and neutron stars (NSs), funnelled a huge amount of work focused on understanding how compact object binaries (COBs) can pair-up and merge together. Here, we review from a theoretical standpoint how different mechanisms concur to the formation, evolution, and merger of COBs around quiescent SMBHs and active galactic nuclei (AGNs), summarizing the main predictions for current and future (GW) detections and outlining the possible features that can clearly mark a galactic nuclei origin.
description: 73 pages, 16 Figures, 2 Tables. Invited review to be published in the Special Issue "Binary Evolution in Galactic Nuclei", eds. Roberto Capuzzo-Dolcetta and Adrian Hamers, accepted for publication in the journal "Universe"
Doppler tomography of the Double Periodic Variable HD 170582 at low and high stage
Creators: name: Mennickent, R. E.
name: Zharikov, S.
name: Cabezas, M.
name: Djurašević, G.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: HD170582 is an interacting binary of the Double Periodic Variable (DPV) type, showing ellipsoidal variability with a period of 16.87 days along with a long photometric cycle of 587 days. It was recently studied by Mennickent et al. (2015), who found a slightly evolved B-type star surrounded by a luminous accretion disc fed by a Roche-lobe overflowing A-type giant. Here we extend their analysis presenting new spectroscopic data and studying the Balmer emission lines. We find orbitally modulated double-peak Halpha and Hbeta emissions whose strength also vary in the long-term. In addition, Doppler maps of the emission lines reveal sites of enhanced line emission in the 1st and 4th velocity quadrants, the first one consistent with the position of one of the bright zones detected by the light curve analysis. We find a difference between Doppler maps at high and low stage of the long cycle; evidence that the emission is optically thicker at high state in the stream-disc impact region, possibly reflecting a larger mass transfer rate. We compare the system parameters with a grid of synthetic binary evolutionary tracks and find the best fitting model. The system is found to be semi-detached, in a conservative Case-B mass transfer stage, with age 7.68E7 yr and mass transfer rate 1.6E-6 Msun/yr. For 5 well-studied DPVs, the disc luminosity scales with the primary mass and is much larger than the theoretical accretion luminosity.
description: Accepted for publication in MNRAS, 11 pages, 4 tables, 11 figures
Evaluating the impact of the Central Chile Mega Drought on debris cover, broadband albedo, and surface drainage system of a Dry Andes glacier
Creators: name: Podgórski, Julian
name: Pętlicki, Michał
name: Fernández, Alfonso
name: Urrutia, Roberto
name: Kinnard, Christophe
Publisher: name: arXiv
Year: 2023
Subjects: subject: Geophysics (physics.geo-ph)
subject: FOS: Physical sciences

description: In recent years, Chile has experienced an extraordinary drought that has had significant impacts on both the livelihoods of people and the environment, including the Andean glaciers. This study focuses on analyzing the surface processes of Universidad Glacier, a benchmark glacier for the Dry Andes. Multiple remote sensing datasets are used alongside a novel spectral index designed for mapping of rock material located on the glacier's surface. Our findings highlight the precarious state of the glacier, which serves as a crucial water source for the region. The glacier exhibits locally varied debris accumulation and margin retreat. The most significant impacts are observed on the tongue and secondary accumulation cirques, with the latter at risk of disappearing. Debris cover on the tongue expands, reaching higher elevations, and is accompanied by glacier retreat, especially at higher altitudes. The equilibrium line is rapidly shifting upglacier, although mid-season snow cover tends to reach the 2013 equilibrium line even by 2020. Changes in stream density on the glacier's tongue indicate an increased water supply in this area, likely due to enhanced melting of glacial ice. These observed processes align well with meteorological data obtained from models. The behavior of dust and debris is influenced by precipitation amount, while the rate of retreat is linked to air temperature.
Education and training of archivists and records managers in Zambia : a needs analysis
Creators: name: Suuya, Muswa T. M. .
Publisher: name: Monash University
Year: 2022

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.
Europäische Ernährungsräume.
Creators: name: Hartmann, Heinrich
Publisher: name: Leipziger Universitätsverlag
Year: 2015

description: Turkey’s place in an economic network of European nations underwent dramatic changes over the 20th century. This reached from semi-colonial experiences in the late Ottoman times to a very extensive integration into a European political and economic system. In the very early days of the Cold War, Turkey was an essential cornerstone of an American geostrategic vision of “Western Europe”. Also, the expected increase of productivity made Turkey’s agriculture an important element in a scheme for feeding Europe, which severely lacked provisions in the first years after the war. Looking at agricultural and economic experts’ perspectives on Turkey’s place in Europe, this article links this post-war way of defining economic spaces to broader, semicolonial discourses about Turkish resources that go back to the 1930s and before. It further analyses how agricultural experts also shaped economic structures through the Marshall Plan, designed to integrate Turkey into a Western European economic space. By doing so, the article sheds light on Europe’s fragile spatial concepts in the Cold War period that relied more often on temporary political arrangements than on a real attempt to define a constant Southern European space.
description: Comparativ, Vol 25 No 3 (2015): Die Verhandlung des Westens. Wissenseliten und die Heterogenität Westeuropas nach 1945
Next to Leading Logarithms and the PHOTOS Monte Carlo
Creators: name: Golonka, P.
name: Was, Z.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: With the approaching start-up of the experiments at LHC, the urgency to quantify systematic uncertainties of the generators, used in the interpretation of the data, is becoming pressing. The PHOTOS Monte Carlo program is often used for the simulationof experimental, selection-sensitive, QED radiative corrections in decays of Z bosons and other heavy resonances and particles. Thanks to its complete phase-space coverage it is possible, with no approximations for any decay channel, to implement the matrix-element. The present paper will be devoted to those parts of the next-to-leading order corrections for Z decays which are normally missing in PHOTOS. The analytical form of the exact and truncated (standard) kernel used in PHOTOS will be explicitly given. The correction, being the ratio of the exact to the approximate kernel, can be activated as an optional contribution to the internal weight of PHOTOS. To calculate the weight, the information on the effective Born-level Z/gamma* couplings and even directions of the incoming beams, is needed. A universal implementation would have made the PHOTOS solution less modular and less convenient for the users. That is why, for the time being, we will keep the correcting weight as an extra option, available for special tests only. We will quantify the numerical effect of the approximation with the help of a multitude of distributions. The numerical size of the effect is in general below 0.1%; however, in some corners of the phase-space (well defined and contributing less than 0.5% to the total rate), it may reach up to about 20% of their relative size.
description: 23+1 pages 6 groups of figures
Upper limits on the dark matter content in globular clusters
Creators: name: Reynoso-Cordova, Javier
name: Regis, Marco
name: Taoso, Marco
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We present a systematic analysis on the possible presence of dark mass components inside globular clusters (GCs). A spherical Jeans analysis is applied to the stellar kinematics of 9 nearby GCs. On top of the mass distribution provided by the luminous stellar component, we add either dark matter (DM), described by an NFW mass profile, or an intermediate mass black-hole (IMBH), described by a point-like mass. Their existence would have important implications in the context of indirect DM searches. After profiling over the stellar parameters, we find no evidence neither for DM nor for IMBH. Upper limits on the two components are reported.
description: 21 pages, 8 Figures, 3 Tables
Spontaneous Lorentz symmetry breaking effects on GRBs jets arising from neutrino pair annihilation process near a black hole
Creators: name: Khodadi, Mohsen
name: Lambiase, Gaetano
name: Mastrototaro, Leonardo
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The study of neutrino pair annihilation into electron-positron pairs ($ν{\bar ν}\to e^-e^+$) is astrophysically well-motivated because it is a possible powering mechanism for the gamma-ray bursts (GRBs). In this paper, we estimate the gamma-ray energy deposition rate (EDR) arising from the annihilation of the neutrino pairs in the equatorial plane of a slowly rotating black hole geometry modified by the broken Lorentz symmetry (induced by a background bumblebee vector field). More specifically, owing to the presence of a dimensionless Lorentz symmetry breaking (LSB) parameter $l$ arising from nonminimal coupling between the bumblebee field with nonzero vacuum expectation value and gravity, the metric solution in question differs from the standard slowly rotating Kerr black hole. By idealizing the thin accretion disk temperature profile in the two forms of isothermal and gradient around the bumblebee gravity-based slow rotating black hole, we investigate the influence of spontaneous LSB on the $ν{\bar ν}$-annihilation efficiency. For both profiles, we find that positive values of LSB parameter $l>0$ induce an enhancement of the EDR associated with the neutrino-antineutrino annihilation. Therefore, the process of powering the GRBs jets around bumblebee gravity modified slowly rotating geometry is more efficient in comparison with standard metric. Using the observed gamma-ray luminosity associated with different GRBs types (short, long, and ultra-long), we find, through the analysis of the EDR in the parameter space $l-a$ ($a^2\ll1$), some allowed ranges for the LSB parameter $l$.
description: 12 pages (two columns), 4 figures, 1 table, accepted for publication in EPJC
Molecular electric moments calculated by using natural orbital functional theory
Creators: name: Mitxelena, Ion
name: Piris, Mario
Publisher: name: arXiv
Year: 2016
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: The molecular electric dipole, quadrupole and octupole moments of a selected set of 21 spin-compensated molecules are determined employing the extended version of the Piris natural orbital functional 6 (PNOF6), using the triple-$ζ$ Gaussian basis set with polarization functions developed by Sadlej, at the experimental geometries. The performance of the PNOF6 is established by carrying out a statistical analysis of the mean absolute errors with respect to the experiment. The calculated PNOF6 electric moments agree satisfactorily with the corresponding experimental data, and are in good agreement with the values obtained by accurate ab initio methods, namely, the coupled-cluster single and doubles (CCSD) and multi-reference single and double excitation configuration interaction (MRSD-CI) methods.
description: 3 figures
Autoritäre Europäisierung.
Creators: name: Kössler, Till
Publisher: name: Leipziger Universitätsverlag
Year: 2015

description: Recent historiography has struggled to determine the place Spain had under the rule of Franco within post-war European history. Most authors have positioned Spain outside of a new liberal Western European order while highlighting the differences between authoritarianism and democracy. In examining influential groups of urban planners and architects, this essay however argues that the ties between expert groups in Franco’s Spain and Western Europe were much closer than has often been suggested. Not only were the urban planners part of a transnational expert community, they also propagated a Europeanization of Spain that would foster economic development, bring about social peace, and a happier way of life. In their view, Western European modernity essentially meant a rationalization of society and everyday life. Their utopian project of authoritarian Europeanization, however, clashed with capitalist interests of building companies and was in itself highly contradictory, which led to a new debate about urban reform in the 1960s.
description: Comparativ, Vol 25 No 3 (2015): Die Verhandlung des Westens. Wissenseliten und die Heterogenität Westeuropas nach 1945
Neurodegeneration: 2023 update
Creators: name: Crary, John Fonda
Publisher: name: Free Neuropathology
Year: 2023
Subjects: Neurodegeneration
Neuropathology
Aging
Alzheimer disease
Tauopathy
α-synucleinopathy
TDP-43 proteinopathy
Traumatic brain injury

description: This paper reviews ten highly impactful studies published in the previous year selected by the author from the neurodegenerative neuropathology literature. As in previous years, the focus is to highlight human tissue-based experimentation most relevant to neuropathologists. A concerted effort was made to balance the selected studies across disease categories, approaches, and methodologies to capture the breadth of the research landscape. Studies include an integrated proteomic and transcriptomic study of Alzheimer disease (AD) and new consensus diagnostic neuropathological criteria for progressive supranuclear palsy. A number of studies looking at TAR DNA-binding protein 43 (TDP-43) are highlighted. One examined interaction between AD and limbic age-related TDP-43 encephalopathy (LATE) and yet another demonstrated how TDP-43 represses cryptic exon inclusion in UNC13A, suggesting a novel pathogenic mechanism. Most surprisingly, three cryogenic electron microscopy (cryo-EM) studies showed that TMEM106B filaments form the core of TDP-43-positive inclusions. Cryo-EM revealed a prion protein amyloid structure from aggregates in Gerstmann-Sträussler-Scheinker disease. There was an elegant functional genomic study cataloging microglial gene expression in the human brain. A study shed light on how APOE influences chronic traumatic encephalopathy. A pathoanatomical study tested the dual hit hypothesis of Lewy body progression throughout the nervous system. And finally, deep learning continues to show its promise with application of a weakly supervised multiple instance learning paradigm to assess aging post-mortem brains.
description: Free Neuropathology, Bd. 4 (2023)
Time-invariant Prefix Coding for LQG Control
Creators: name: Cuvelier, Travis C.
name: Tanaka, Takashi
name: Heath, Robert W.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Information Theory (cs.IT)
subject: Systems and Control (eess.SY)
subject: Signal Processing (eess.SP)
subject: Optimization and Control (math.OC)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Mathematics

description: Motivated by control with communication constraints, in this work we develop a time-invariant data compression architecture for linear-quadratic-Gaussian (LQG) control with minimum bitrate prefix-free feedback. For any fixed control performance, the approach we propose nearly achieves known directed information (DI) lower bounds on the time-average expected codeword length. We refine the analysis of a classical achievability approach, which required quantized plant measurements to be encoded via a time-varying lossless source code. We prove that the sequence of random variables describing the quantizations has a limiting distribution and that the quantizations may be encoded with a fixed source code optimized for this distribution without added time-asymptotic redundancy. Our result follows from analyzing the long-term stochastic behavior of the system, and permits us to additionally guarantee that the time-average codeword length (as opposed to expected length) is almost surely within a few bits of the minimum DI. To our knowledge, this time-invariant achievability result is the first in the literature. The originally published version of the supplementary material included a proof that contained an error that turned out to be inconsequential. This updated preprint corrects this error, which originally appeared under Lemma A.7.
description: Version as accepted to the IEEE Journal on Selected Areas in Information Theory (Special Issue on Modern Compression), modulo an additional correction to the proof of Lemma A.7. Official version: https://ieeexplore.ieee.org/document/10002900. 14 page main paper, 4 pages appendix, 3 figures
Production and material planning in the Just-in-Time era
Creators: name: Chang, Chao Lin.
Publisher: name: Monash University
Year: 2022

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.
Search for the singlet vector-like top quark in the $T\to tZ$ channel with $Z\to ν\barν$ at hadron colliders
Creators: name: Han, Lin
name: Wang, Shiyu
name: Shang, Liangliang
name: Yang, Bingfang
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Based on a simplified model including a singlet vector-like top quark $T$ with charge $|Q|=2/3$, we analyze the prospects of observing $T$ via the single $T$ production in the $tZ$ channel with $Z$ decaying to neutrinos at the hadron-hadron colliders. This simplified model only includes two free parameters, the coupling constant $g^*$ and the $T$ quark mass $m_T$. To investigate the observability of the single $T$ production, we perform a detailed background analysis and detector simulation for the collision energies 14~TeV, 27~TeV, and 100~TeV. We scan the $g^*-m_T$ parameter space and show the exclusion and discovery capabilities on the $T$ quark with the highest integrated luminosity designed at these colliders. Moreover, the limits from the narrow-width approximation and electroweak precision observables are considered.
description: 17 pages, 7 figures. References added
Optimizing Communication and Computation for Multi-UAV Information Gathering Applications
Creators: name: Thammawichai, Mason
name: Baliyarasimhuni, Sujit P.
name: Kerrigan, Eric C.
name: Sousa, João B.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Systems and Control (eess.SY)
subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: Robotics (cs.RO)
subject: Optimization and Control (math.OC)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: Mobile agent networks, such as multi-UAV systems, are constrained by limited resources. In particular, limited energy affects system performance directly, such as system lifetime. It has been demonstrated in the wireless sensor network literature that the communication energy consumption dominates the computational and the sensing energy consumption. Hence, the lifetime of the multi-UAV systems can be extended significantly by optimizing the amount of communication data, at the expense of increasing computational cost. In this work, we aim at attaining an optimal trade-off between the communication and the computational energy. Specifically, we propose a mixed-integer optimization formulation for a multi-hop hierarchical clustering-based self-organizing UAV network incorporating data aggregation, to obtain an energy-efficient information routing scheme. The proposed framework is tested on two applications, namely target tracking and area mapping. Based on simulation results, our method can significantly save energy compared to a baseline strategy, where there is no data aggregation and clustering scheme.
Universal control of superexchange in linear triple quantum dots with an empty mediator
Creators: name: Chan, Guo Xuan
name: Huang, Peihao
name: Wang, Xin
Publisher: name: arXiv
Year: 2022
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Superexchange is one of the vital resources to realize long-range interaction between distant spins for large-scale quantum computing. Recent experiments have demonstrated coherent oscillations between logical states defined by remote spins whose coupling is given by the superexchange interaction mediated by central spins. Excavating the potential of superexchange requires a full understanding of the interaction in terms of control parameters, which is still lacking in literature. Here, using full configuration interaction calculations, we study a two-electron system in a linear triple-quantum-dot device in which the left and right dots are occupied by a single electron each, whose spin states are defined as qubits. The numerical nature of the full configuration interaction calculations allows access to the microscopic details of the quantum-dot confining potential and electronic wavefunctions, some of which are overlooked in the celebrated Hubbard model but turn out to be critical for the behavior of superexchange. We focus on the detuning regime where the charge ground state yields an empty middle dot. We have found that, when the detunings at the left and right dots are leveled, the superexchange can exhibit a non-monotonic behavior which ranges from positive to negative values as a function of the middle-dot detuning. We further show that a larger relative detuning between the left and right dots causes the magnitude of the superexchange to increase (decrease) for an originally positive (negative) superexchange. We then proceed to show the results for a much larger left-right dot detuning. Our results suggest that even a simple configuration of delocalized two-electron states in a linear triple-quantum-dot device exhibits superexchange energy with non-trivial behaviors, which could have important applications in spin-based quantum computing.
description: 9+6 pages, 6+1 figures
An experimental SQL-based system: dSQL
Creators: name: Wang, Jenny Zhe.
Publisher: name: Monash University
Year: 2022

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.
Light and Feebly Interacting Non-Abelian Vector Dark Matter Produced Through Vector Misalignment
Creators: name: Elahi, Fatemeh
name: Khatibi, Sara
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In this paper, we examine the evolution of light and feebly interacting non-abelian dark gauge bosons dark matter in the early universe. We specifically work on a multi-component dark matter scenario with a $SU(2)_{_R}$ gauge symmetry, spontaneously broken by a scalar $ϕ$. For sufficiently light $\lesssim O( \rm{MeV})$ and feebly interacting $(g_{_R} \lesssim 10^{-10})$ gauge bosons, $W^3_{_R}$ and $W^{\pm}_{_R} \equiv W_{_R}^1 \pm i W_{_R}^2$ become the dark matter candidates. In this study, the portal between the dark sector and the standard model sector is provided by the right-handed electron charged under $SU(2)_{_R}$. We show that in the region of the parameter space where $g_{_R} \sim 10^{-12}$, the dark gauge boson $W^3_{_R}$ can be produced efficiently via the freeze-in mechanism, however, this mechanism fails to produce $W^{\pm}_{_R}$ sufficiently. For smaller dark gauge coupling, the relic density of three dark matter components can be obtained via the vector misalignment mechanism. Vector misalignment has already been discussed in the case of dark photon dark matter. In this study, we extend the arguments to non-abelian gauge bosons. After discussing the evolution of $W_{_R}$s in the early universe, we study the model's constraints and show the parameter space's allowed region.
description: 17 pages, 5 figures
Bidirectional invisibility in Kramers-Kronig optical media
Creators: name: Longhi, Stefano
Publisher: name: arXiv
Year: 2016
Subjects: subject: Optics (physics.optics)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: A broad class of planar dielectric media with complex permittivity profiles that are fully invisible, for both left and right incidence sides, is introduced. Such optical media are locally isotropic, non-magnetic and belong to the recently discovered class of Kramers-Kronig media [{\it Nature Photon.} 9, 436 (2015)], i.e. the spatial profiles of the real and imaginary parts of the dielectric permittivity are related each other by a Hilbert transform. The transition from unidirectional to bidirectional invisibility, and the possibility to realize sharp reflection above a cut-off incidence angle, are also discussed.
description: 4 figures, to appear in Optics Letters
On the Impact of Entity Linking in Microblog Real-Time Filtering
Creators: name: Berardi, Giacomo
name: Ceccarelli, Diego
name: Esuli, Andrea
name: Marcheggiani, Diego
Publisher: name: arXiv
Year: 2016
Subjects: subject: Information Retrieval (cs.IR)
subject: FOS: Computer and information sciences
subject: H.4

description: Microblogging is a model of content sharing in which the temporal locality of posts with respect to important events, either of foreseeable or unforeseeable nature, makes applica- tions of real-time filtering of great practical interest. We propose the use of Entity Linking (EL) in order to improve the retrieval effectiveness, by enriching the representation of microblog posts and filtering queries. EL is the process of recognizing in an unstructured text the mention of relevant entities described in a knowledge base. EL of short pieces of text is a difficult task, but it is also a scenario in which the information EL adds to the text can have a substantial impact on the retrieval process. We implement a start-of-the-art filtering method, based on the best systems from the TREC Microblog track realtime adhoc retrieval and filtering tasks , and extend it with a Wikipedia-based EL method. Results show that the use of EL significantly improves over non-EL based versions of the filtering methods.
description: 6 pages, 1 figure, 1 table. SAC 2015, Salamanca, Spain - April 13 - 17, 2015