cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Sim-and-Real Reinforcement Learning for Manipulation: A Consensus-based Approach
Creators: name: Liu, Wenxing
name: Niu, Hanlin
name: Pan, Wei
name: Herrmann, Guido
name: Carrasco, Joaquin
Publisher: name: arXiv
Year: 2023
Subjects: subject: Robotics (cs.RO)
subject: Artificial Intelligence (cs.AI)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Sim-and-real training is a promising alternative to sim-to-real training for robot manipulations. However, the current sim-and-real training is neither efficient, i.e., slow convergence to the optimal policy, nor effective, i.e., sizeable real-world robot data. Given limited time and hardware budgets, the performance of sim-and-real training is not satisfactory. In this paper, we propose a Consensus-based Sim-And-Real deep reinforcement learning algorithm (CSAR) for manipulator pick-and-place tasks, which shows comparable performance in both sim-and-real worlds. In this algorithm, we train the agents in simulators and the real world to get the optimal policies for both sim-and-real worlds. We found two interesting phenomenons: (1) Best policy in simulation is not the best for sim-and-real training. (2) The more simulation agents, the better sim-and-real training. The experimental video is available at: https://youtu.be/mcHJtNIsTEQ.
description: 7 pages, 8 figures, IEEE International Conference on Robotics and Automation (ICRA) 2023
Education and politics in the development of the education systems of N.S.W. and Victoria 1900-1940, with particular reference to post-primary education
Creators: name: Bessant, Bob
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 Reference field.
Linear and nonlinear spin current response in anisotropic spin-orbit coupled systems
Creators: name: Muñoz-Santana, D.
name: Maytorena, Jesús A.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We calculate the linear and the second harmonic (SH) spin current response of two anisotropic systems with spin orbit (SO) interaction. The first system is a two-dimensional (2D) electron gas in the presence of Rashba and k-linear Dresselhaus SO couplings. The dependence of the anisotropic spin splitting on the sample growth direction introduces an additional path to modify the linear and nonlinear spectra. In particular, vanishing linear and second order spin conductivity tensors are achievable under SU(2) symmetry conditions, characterized by a collinear SO vector field. Additional conditions under which specific tensor components vanish are posible, without having such collinearity. Thus, a proper choice of the growth direction and SO strengths allows to select the polarization of the linear and SH spin currents according to the direction of flowing. The second system is an anisotropic 2D free electron gas with anisotropic Rashba interaction, which has been employed to study the optical conductivity of 2D puckered structures with anisotropic energy bands. The presence of mass anisotropy and an energy gap open several distinct scenarios for the allowed optical interband transitions, which manifest in the linear and SH response contrastingly. The linear response displays only out-of-plane spin polarized currents, while the SH spin currents flow with spin orientation lying parallel to the plane of the system strictly. The models illustrate the possibility of the nonlinear spin Hall effect in systems with SO interaction, under the presence or absence of time-reversal symmetry. The results suggest different ways to manipulate the linear
Polymer Quantization of a Self-Gravitating Thin Shell
Creators: name: Ziprick, Jonathan
name: Gegenberg, Jack
name: Kunstatter, Gabor
Publisher: name: arXiv
Year: 2016
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We study the quantum mechanics of self-gravitating thin shell collapse by solving the polymerized Wheeler-DeWitt equation. We obtain the energy spectrum and solve the time dependent equation using numerics. In contradistinction to the continuum theory, we are able to consistently quantize the theory for super-Planckian black holes, and find two choices of boundary conditions which conserve energy and probability, as opposed to one in the continuum theory. Another feature unique to the polymer theory is the existence of negative energy stationary states that disappear from the spectrum as the polymer scale goes to zero. In both theories the probability density is positive semi-definite only for the space of positive energy stationary states. Dynamically, we find that an initial Gaussian probability density develops regions of negative probability as the wavepacket approaches $R=0$ and bounces. This implies that the bouncing state is a sum of both positive and negative eigenstates.
description: 23 pages, 5 figures
ABCF guide to political prisoner and prisoner of war support : how and why to build principled support relationships with political prisoners and prisoners of war
Creators: name: Anarchist Black Cross Federation
Publisher: name: University of Victoria Libraries
Year: 2020
Subjects: subject: Anarchism
valueUri: http://id.worldcat.org/fast/808387
subject: History
valueUri: http://id.worldcat.org/fast/1411628
subject: Prisoners of war
valueUri: http://id.worldcat.org/fast/1077227
subject: Prisons
valueUri: http://id.worldcat.org/fast/1077326
subject: Anarchist Black Cross
valueUri: http://id.worldcat.org/fast/661189
subject: Anarchists
valueUri: http://id.worldcat.org/fast/808401
subject: Anarchist Black Cross Federation
valueUri: http://id.worldcat.org/fast/1635778
subject: Prisoners--Legal status, laws, etc.
valueUri: http://id.worldcat.org/fast/1077155
subject: Prisoners
valueUri: http://id.worldcat.org/fast/1077103
subject: Political prisoners
valueUri: http://id.worldcat.org/fast/1069636
subject: Prisoners--Civil rights
valueUri: http://id.worldcat.org/fast/1077110

description: Contains information about the Anarchist Black Cross Federation (ABCF) and its history along with information about Prisoners of War (POW) and Political Prisoners (PP) and how to support them.
Interplay of inhibition and multiplexing : Largest eigenvalue statistics
Creators: name: Ghosh, Saptarshi
name: Dwivedi, Sanjiv K.
name: Ivanchenko, Mikhail V.
name: Jalan, Sarika
Publisher: name: arXiv
Year: 2016
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: The largest eigenvalue of a network provides understanding to various dynamical as well as stability properties of the underlying system. We investigate an interplay of inhibition and multiplexing on the largest eigenvalue statistics of networks. Using numerical experiments, we demonstrate that presence of the inhibitory coupling may lead to a very different behaviour of the largest eigenvalue statistics of multiplex networks than those of the isolated networks depending upon network architecture of the individual layer. We demonstrate that there is a transition from the Weibull to the Gumbel or to the Frechet distribution as networks are multiplexed. Furthermore, for denser networks, there is a convergence to the Gumbel distribution as network size increases indicating higher stability of larger systems.
Reinforced Labels: Multi-Agent Deep Reinforcement Learning for Point-Feature Label Placement
Creators: name: Bobák, Petr
name: Čmolík, Ladislav
name: Čadík, Martin
Publisher: name: arXiv
Year: 2023
Subjects: subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Over the recent years, Reinforcement Learning combined with Deep Learning techniques has successfully proven to solve complex problems in various domains, including robotics, self-driving cars, and finance. In this paper, we are introducing Reinforcement Learning (RL) to label placement, a complex task in data visualization that seeks optimal positioning for labels to avoid overlap and ensure legibility. Our novel point-feature label placement method utilizes Multi-Agent Deep Reinforcement Learning to learn the label placement strategy, the first machine-learning-driven labeling method, in contrast to the existing hand-crafted algorithms designed by human experts. To facilitate RL learning, we developed an environment where an agent acts as a proxy for a label, a short textual annotation that augments visualization. Our results show that the strategy trained by our method significantly outperforms the random strategy of an untrained agent and the compared methods designed by human experts in terms of completeness (i.e., the number of placed labels). The trade-off is increased computation time, making the proposed method slower than the compared methods. Nevertheless, our method is ideal for scenarios where the labeling can be computed in advance, and completeness is essential, such as cartographic maps, technical drawings, and medical atlases. Additionally, we conducted a user study to assess the perceived performance. The outcomes revealed that the participants considered the proposed method to be significantly better than the other examined methods. This indicates that the improved completeness is not just reflected in the quantitative metrics but also in the subjective evaluation by the participants.
Roger that! Learning How Laypersons Teach New Functions to Intelligent Systems
Creators: name: Weigelt, Sebastian
name: Steurer, Vanessa
name: Hey, Tobias
name: Tichy, Walter F.
Publisher: name: Karlsruhe
Year: 2020
Subjects: Machine Learning
Programming in Natural Language
Natural Language Understanding
Natural Language Processing
Neural Networks
Artificial Neural Networks
Recurrent Neural Networks
Convolutional Neural Networks
Intelligent System
End User Programming
Artificial Intelligence

description: Intelligent systems are rather smart today but still limited to built-in functionality. To break through this barrier, future systems must allow users to easily adapt the system by themselves. For humans the most natural way to communicate is talking. But what if users want to extend the systems’ functionality with nothing but natural language? Then intelligent systems must understand how laypersons teach new skills. To grasp the semantics of such teaching sequences, we have defined a hierarchical classification task. On the first level, we consider the existence of a teaching intent in an utterance; on the second, we classify the distinct semantic parts of teaching sequences: declaration of a new function, specification of intermediate steps, and superfluous information. We evaluate twelve machine learning techniques with multiple configurations tailored to this task ranging from classical approaches such as naı̈ve-bayes to modern techniques such as bidirectional LSTMs and task-oriented adaptations. On the first level convolutional neural networks achieve the best accuracy (96.6%). For the second task, bidirectional LSTMs are the most accurate (98.8%). With the additional adaptations we are able to improve both classifications distinctly (up to 1.8%).
Lepton flavor violating Z' explanation of the muon anomalous magnetic moment
Creators: name: Altmannshofer, Wolfgang
name: Chen, Chien-Yi
name: Dev, P. S. Bhupal
name: Soni, Amarjit
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We discuss a minimal solution to the long-standing $(g-2)_μ$ anomaly in a simple extension of the Standard Model with an extra $Z'$ vector boson that has only flavor off-diagonal couplings to the second and third generation of leptons, i.e. $μ, τ, ν_μ, ν_τ$ and their antiparticles. A simplified model realization, as well as various collider and low-energy constraints on this model, are discussed. We find that the $(g-2)_μ$-favored region for a $Z'$ lighter than the tau lepton is totally excluded, while a heavier $Z'$ solution is still allowed. Some testable implications of this scenario in future experiments, such as lepton-flavor universality-violating tau decays at Belle 2, and a new four-lepton signature involving same-sign di-muons and di-taus at HL-LHC and FCC-ee, are pointed out. A characteristic resonant absorption feature in the high-energy neutrino spectrum might also be observed by neutrino telescopes like IceCube and KM3NeT.
description: 12 pages, 9 figures
Menulis Tesis: Mengelaborasi Fakta, Menempatkan Konteks
Creators: name: Wekke, Ismail Suardi
Publisher: name: Zenodo
Year: 2023
Subjects: sorong
tesis
pascasarjana

description: Ujian Tertutup Tesis, an. Julyadin, Pascasarjana IAIN Sorong.
Evolutionary Augmentation Policy Optimization for Self-supervised Learning
Creators: name: Barrett, Noah
name: Sadeghi, Zahra
name: Matwin, Stan
Publisher: name: arXiv
Year: 2023
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Artificial Intelligence (cs.AI)
subject: Machine Learning (cs.LG)
subject: Neural and Evolutionary Computing (cs.NE)
subject: FOS: Computer and information sciences

description: Self-supervised Learning (SSL) is a machine learning algorithm for pretraining Deep Neural Networks (DNNs) without requiring manually labeled data. The central idea of this learning technique is based on an auxiliary stage aka pretext task in which labeled data are created automatically through data augmentation and exploited for pretraining the DNN. However, the effect of each pretext task is not well studied or compared in the literature. In this paper, we study the contribution of augmentation operators on the performance of self supervised learning algorithms in a constrained settings. We propose an evolutionary search method for optimization of data augmentation pipeline in pretext tasks and measure the impact of augmentation operators in several SOTA SSL algorithms. By encoding different combination of augmentation operators in chromosomes we seek the optimal augmentation policies through an evolutionary optimization mechanism. We further introduce methods for analyzing and explaining the performance of optimized SSL algorithms. Our results indicate that our proposed method can find solutions that outperform the accuracy of classification of SSL algorithms which confirms the influence of augmentation policy choice on the overall performance of SSL algorithms. We also compare optimal SSL solutions found by our evolutionary search mechanism and show the effect of batch size in the pretext task on two visual datasets.
The reader and the family : cross generational studies of readers and their reading
Creators: name: Bechervaise, Neil Edward
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 Reference field.
Dewetting and Spreading Transitions for Active Matter on Random Pinning Substrates
Creators: name: Sándor, Cs.
name: Libál, A.
name: Reichhardt, C.
name: Reichhardt, C. J. Olson
Publisher: name: arXiv
Year: 2016
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We show that sterically interacting self-propelled disks in the presence of random pinning substrates exhibit transitions among a variety of different states. In particular, from a phase separated cluster state, the disks can spread out and homogeneously cover the substrate in what can be viewed as an example of an active matter wetting transition. We map the location of this transition as a function of activity, disk density, and substrate strength, and we also identify other phases including a cluster state, coexistence between a cluster and a labyrinth wetted phase, and a pinned liquid. These phases can be identified using the cluster size, which dips at the wetting-dewetting transition, and the fraction of sixfold coordinated particles, which drops when dewetting occurs.
description: 5 pages, 5 png figures
Probing hidden Mott gap and incommensurate charge modulation on the polar surfaces of PdCrO$_2$
Creators: name: Wen, Chenhaoping
name: Qin, Tian
name: Zhang, Xuefeng
name: Zhang, Mingxin
name: Shen, Shiwei
name: Yang, Zhongzheng
name: Qi, Yanpeng
name: Li, Gang
name: Yan, Shichao
Publisher: name: arXiv
Year: 2023
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Here we report a combined study of low-temperature scanning tunneling microscopy (STM) and dynamical mean-field theory (DMFT) on PdCrO$_2$, a delafossite metal with an antiferromagnetic order below ~37.5 K. First, on the CrO$_2$-terminated polar surface we detect a gap-like feature both below and above the Néel temperature. The DMFT calculations indicate that this gap is opened due to the strong correlations of Cr-3d electrons, suggesting the hidden Mott nature of the gap. Then, we observe two kinds of Pd-terminated polar surfaces. One is a well-ordered Pd surface with the Fermi-surface-nesting-induced incommensurate charge modulation, while the other one is a reconstructed Pd surface with the individual nano-scale non-periodic domain structures. On the well-ordered Pd surface, the interference between the incommensurate charge modulation and the atomic lattice forms the periodic moiré pattern. Our results provide important microscopic information for fully understanding the correlated electronic properties of this class of materials.
description: 11 pages, 4 figures
DwinFormer: Dual Window Transformers for End-to-End Monocular Depth Estimation
Creators: name: Rahman, Md Awsafur
name: Fattah, Shaikh Anowarul
Publisher: name: arXiv
Year: 2023
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Depth estimation from a single image is of paramount importance in the realm of computer vision, with a multitude of applications. Conventional methods suffer from the trade-off between consistency and fine-grained details due to the local-receptive field limiting their practicality. This lack of long-range dependency inherently comes from the convolutional neural network part of the architecture. In this paper, a dual window transformer-based network, namely DwinFormer, is proposed, which utilizes both local and global features for end-to-end monocular depth estimation. The DwinFormer consists of dual window self-attention and cross-attention transformers, Dwin-SAT and Dwin-CAT, respectively. The Dwin-SAT seamlessly extracts intricate, locally aware features while concurrently capturing global context. It harnesses the power of local and global window attention to adeptly capture both short-range and long-range dependencies, obviating the need for complex and computationally expensive operations, such as attention masking or window shifting. Moreover, Dwin-SAT introduces inductive biases which provide desirable properties, such as translational equvariance and less dependence on large-scale data. Furthermore, conventional decoding methods often rely on skip connections which may result in semantic discrepancies and a lack of global context when fusing encoder and decoder features. In contrast, the Dwin-CAT employs both local and global window cross-attention to seamlessly fuse encoder and decoder features with both fine-grained local and contextually aware global information, effectively amending semantic gap. Empirical evidence obtained through extensive experimentation on the NYU-Depth-V2 and KITTI datasets demonstrates the superiority of the proposed method, consistently outperforming existing approaches across both indoor and outdoor environments.
Dynamic chiral magnetic effect and Faraday rotation in macroscopically disordered helical metals
Creators: name: Ma, Jing
name: Pesin, D. A.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We develop an effective medium theory for electromagnetic wave propagation through gapless non-uniform systems with dynamic chiral magnetic effect. The theory allows to calculate macroscopic-disorder-induced corrections to the values of optical, as well as chiral magnetic conductivities. In particular, we show that spatial fluctuations of optical conductivity induce corrections to the effective value of the chiral magnetic conductivity. Experimentally, these corrections can be observed as sharp features in the Faraday rotation angle near frequencies that correspond to the bulk plasmon resonances of a material. Such features are not expected to be present in single crystal samples.
description: 4 pages, 2 figures
Dark Stars and Gravitational Waves: Topical Review
Creators: name: Zhang, Kilar
name: Luo, Ling-Wei
name: Tsao, Jie-Shiun
name: Chen, Chian-Shu
name: Lin, Feng-Li
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Motivated by recent observations of compact binary gravitational wave events reported by LIGO/Virgo/KAGRA, we review the basics of dark and hybrid stars and examine their probabilities as mimickers for black holes and neutron stars. This review aims to survey this exciting topic and offer the necessary tools for the research study at the introductory level. Although called a review, some results are newly derived, such as the equations of state for specific dark star models and the scaling symmetry for the Tidal Love number.
description: 31 pages, 9 figures; v2: minor revison; v3: minor revison, published version
High thermoelectric performance in metallic NiAu alloys
Creators: name: Garmroudi, Fabian
name: Parzer, Michael
name: Riss, Alexander
name: Bourgès, Cédric
name: Khmelevskyi, Sergii
name: Mori, Takao
name: Bauer, Ernst
name: Pustogow, Andrej
Publisher: name: arXiv
Year: 2023
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Thermoelectric (TE) materials seamlessly convert thermal into electrical energy and vice versa, making them promising for applications such as power generation or cooling. Although historically the TE effect was first discovered in metals, state-of-the-art research mainly focuses on doped semiconductors with large figure of merit, $zT$, that determines the conversion efficiency of TE devices. While metallic alloys have superior functional properties, such as high ductility and mechanical strength, they have mostly been discarded from investigation in the past due to their small Seebeck effect. Here, we realize unprecedented TE performance in metals by tuning the energy-dependent electronic scattering. Based on our theoretical predictions, we identify binary NiAu alloys as promising candidate materials and experimentally discover colossal power factors up to 34 mWm$^{-1}$K$^{-2}$ (on average 30 mWm$^{-1}$K$^{-2}$ from 300 to 1100 K), which is more than twice larger than in any known bulk material above room temperature. This system reaches a $zT$ up to 0.5, setting a new world record value for metals. NiAu alloys are not only orders of magnitude more conductive than heavily doped semiconductors, but also have large Seebeck coefficients originating from an inherently different physical mechanism: within the Au s band conduction electrons are highly mobile while holes are scattered into more localized Ni d states, yielding a strongly energy-dependent carrier mobility. Our work challenges the common belief that good metals are bad thermoelectrics and presents an auspicious paradigm for achieving high TE performance in metallic alloys through engineering electron-hole selective s-d scattering.
The national co-ordination of technical and further education
Creators: name: Batrouney, Trevor James Anthony
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 Reference field.
Stable giant vortex annuli in microwave-coupled atomic condensates
Creators: name: Qin, Jieli
name: Dong, Guangjiong
name: Malomed, Boris
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Pattern Formation and Solitons (nlin.PS)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Stable self-trapped vortex annuli (VAs) with large values of topological charge S (giant VAs) are not only a subject of fundamental interest, but are also sought for various applications, such as quantum information processing and storage. However, in conventional atomic Bose-Einstein condensates (BECs) VAs with S>1 are unstable. Here, we demonstrate that robust self-trapped fundamental solitons (with S=0) and bright VAs (with the stability checked up to S=5), can be created in the free space by means of the local-field effect (the feedback of the BEC on the propagation of electromagnetic waves) in a condensate of two-level atoms coupled by a microwave (MW) field, as well as in a gas of MW-coupled fermions with spin 1/2. The fundamental solitons and VAs remain stable in the presence of an arbitrarily strong repulsive contact interaction (in that case, the solitons are constructed analytically by means of the Thomas-Fermi approximation). Under the action of the moderate attractive contact interaction which, by itself, would lead to collapse, the fundamental solitons and VAs exist and are stable, respectively; it is interesting that higher-order VAs are more robust than their lower-order couterparts, on the contrary to what is known in other systems that may support stable self-trapped vortices. Conditions for the experimental realizations of the VAs are discussed.
description: 7 pages, 6 figures, Physical Review A, in press
PL-UNeXt: Per-stage Edge Detail and Line Feature Guided Segmentation for Power Line Detection
Creators: name: Cheng, Yang
name: Chen, Zhen
name: Liu, Daming
Publisher: name: arXiv
Year: 2023
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Power line detection is a critical inspection task for electricity companies and is also useful in avoiding drone obstacles. Accurately separating power lines from the surrounding area in the aerial image is still challenging due to the intricate background and low pixel ratio. In order to properly capture the guidance of the spatial edge detail prior and line features, we offer PL-UNeXt, a power line segmentation model with a booster training strategy. We design edge detail heads computing the loss in edge space to guide the lower-level detail learning and line feature heads generating auxiliary segmentation masks to supervise higher-level line feature learning. Benefited from this design, our model can reach 70.6 F1 score (+1.9%) on TTPLA and 68.41 mIoU (+5.2%) on VITL (without utilizing IR images), while preserving a real-time performance due to few inference parameters.
description: Accepted to IEEE ICIP 2023
A simple approach to Lieb--Thirring type inequalities
Creators: name: Seiringer, Robert
name: Solovej, Jan Philip
Publisher: name: arXiv
Year: 2023
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: In \cite{Nam} Nam proved a Lieb--Thirring Inequality for the kinetic energy of a fermionic quantum system, with almost optimal (semi-classical) constant and a gradient correction term. We present a stronger version of this inequality, with a much simplified proof. As a corollary we obtain a simple proof of the original Lieb--Thirring inequality.
description: 5 pages; minor corrections; published version
Administrative decentralisation and educational programme implementation : a study of the Kegalle District Education Department in Sri Lanka
Creators: name: Bandaranayake, Basnayake M.
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 Reference field.
"As we see it" : towards the 21st century
Creators: name: Libertarian Workers For A Self-Managed Society
Publisher: name: University of Victoria Libraries
Year: 2020
Subjects: subject: Political platforms
valueUri: http://id.worldcat.org/fast/1423827
subject: Cooperation
valueUri: http://id.worldcat.org/fast/878116
subject: Anarchists
valueUri: http://id.worldcat.org/fast/808401
subject: Libertarian Workers for a Self-Managed Society
valueUri: http://id.worldcat.org/fast/664008
subject: History
valueUri: http://id.worldcat.org/fast/1411628
subject: Community organization
valueUri: http://id.worldcat.org/fast/1432034
subject: Works councils
valueUri: http://id.worldcat.org/fast/1180686
subject: Anarchism
valueUri: http://id.worldcat.org/fast/808387

description: The Libertarian Workers for a Self-Managed Society is an Anarchist group which has been in existence in Melbourne, Australia since 1977. This pamphlet outlines their viewpoint on the world, and forms the basis of their political program towards the year 2000. In Melbourne in 1977 the Libertarian Workers for a Self-Managed Society (LW) were formed. This Libertarian Workers group engaged very actively in propaganda, which played a major part on making possible the Australian Anarchist Centenary Celebrations of 1986. Apart from generally respectful publicity the lasting consequences of the Celebrations were the founding of the Anarchist Media Institute.
Considerations Concerning the Little Group
Creators: name: Erler, Jens
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: I very briefly review both the historical and constructive approaches to relativistic quantum mechanics and relativistic quantum field theory including remarks on the possibility of a non-vanishing photon mass, as well as a foolhardy speculation regarding dark matter.
description: 10 pages
River-bed armoring as a granular segregation phenomenon
Creators: name: Ferdowsi, Behrooz
name: Ortiz, Carlos P.
name: Houssais, Morgane
name: Jerolmack, Douglas J.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Geophysics (physics.geo-ph)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Gravel-river beds typically have an "armored" layer of coarse grains on the surface, which acts to protect finer particles underneath from erosion. River bed-load transport is a kind of dense granular flow, and such flows are known to vertically segregate grains. The contribution of granular physics to river-bed armoring, however, has not been investigated. Here we examine these connections in a laboratory river with bimodal sediment size, by tracking the motion of particles from the surface to deep inside the bed, and find that armor develops by two distinct mechanisms. Bed-load transport in the near-surface layer drives rapid segregation, with a vertical advection rate proportional to the granular shear rate. Creeping grains beneath the bed-load layer give rise to slow but persistent segregation, which is diffusion dominated and insensitive to shear rate. We verify these findings with a continuum phenomenological model and discrete element method simulations. Our results suggest that river beds armor by granular segregation from below --- rather than fluid-driven sorting from above --- while also providing new insights on the mechanics of segregation that are relevant to a wide range of granular flows.
Global-in-time Well-posedness of the One-dimensional Hydrodynamic Gross-Pitaevskii Equations without Vacuum
Creators: name: Wegner, Robert
Publisher: name: arXiv
Year: 2023
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 35Q55, 35Q31, 37K10, 76N10

description: We establish global-in-time well-posedness of the one-dimensional hydrodynamic Gross-Pitaevskii equations in the absence of vacuum in $(1 + H^s) \times H^{s-1}$ with $s \geq 1$. We achieve this by a reduction via the Madelung transform to the previous global-in-time well-posedness result for the Gross-Pitaevskii equation in arXiv:1801.08386v2 [math.AP] and arXiv:2204.06293v1 [math.AP]. Our core result is a local bilipschitz equivalence between the relevant function spaces.
Legitimate network governance in small-scale fisheries in northern Chile
Creators: name: Albornoz, Cristian
name: Panitz, Robert
name: Glückler, Johannes
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Physical Sciences not elsewhere classified
subject: Medicine
subject: Genetics
subject: FOS: Biological sciences
subject: Environmental Sciences not elsewhere classified
subject: Sociology
subject: FOS: Sociology
subject: Cancer
subject: Infectious Diseases
subject: FOS: Health sciences

description: By introducing Territorial Use Rights for Fisheries (TURF), the Chilean government has devolved authority over the appropriation of benthic fisheries to local fishers’ organisations. Yet there is little evidence of how this local governance works for membership organisations. Drawing on the theory of lateral network governance, the role of legitimacy in governance outcomes is examined by conducting a comparative case study of two TURF networks in northern Chile. Counterintuitively, more effective governance outcomes were found in the TURF network characterised by a less favourable legitimacy structure of decision-making than the case with a better legitimacy structure. Considering context and network evolution, it is suggested that although organisational renewal and high membership turnover potentially fragment legitimacy, they also enable novel collective action and better governance outcomes. The observed divergence of actual legitimacy from formal governance structure underscores the need for dynamic analysis of collective resource governance beyond the formal chart.
Mitigating Position Bias with Regularization for Recommender Systems
Creators: name: Wang, Hao
Publisher: name: arXiv
Year: 2024
Subjects: subject: Information Retrieval (cs.IR)
subject: FOS: Computer and information sciences

description: Fairness is a popular research topic in recent years. A research topic closely related to fairness is bias and debiasing. Among different types of bias problems, position bias is one of the most widely encountered symptoms. Position bias means that recommended items on top of the recommendation list has a higher likelihood to be clicked than items on bottom of the same list. To mitigate this problem, we propose to use regularization technique to reduce the bias effect. In the experiment section, we prove that our method is superior to other modern algorithms.
Measurement device independent quantum key distribution over 404 km optical fibre
Creators: name: Yin, Hua-Lei
name: Chen, Teng-Yun
name: Yu, Zong-Wen
name: Liu, Hui
name: You, Li-Xing
name: Zhou, Yi-Heng
name: Chen, Si-Jing
name: Mao, Yingqiu
name: Huang, Ming-Qi
name: Zhang, Wei-Jun
name: Chen, Hao
name: Li, Ming Jun
name: Nolan, Daniel
name: Zhou, Fei
name: Jiang, Xiao
name: Wang, Zhen
name: Zhang, Qiang
name: Wang, Xiang-Bin
name: Pan, Jian-Wei
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Quantum key distribution (QKD) can provide unconditional secure communication between two distant parties. Although the significance of QKD is undisputed, its feasibility has been questioned because of certain limitations in the practical application of real-life QKD systems. It is a common belief the lack of perfect single-photon source and the existence of detection loss will handicap the feasibility of QKD by creating security loopholes and distance limitations. The measurement device independent QKD (MDIQKD) with decoy-state method removes the security threats from both the imperfect single-photon source and the detection loss. Lengthening the distance and improving the key rate of QKD with such a superior method is thus the central issue in the practical application of QKD. Here, we report the results of MDIQKD over 404 km of ultralow-loss optical fibre and 311 km of standard optical fibre by employing an optimized four-intensity decoy-state method. This record-breaking implementation of MDIQKD method not only provides a new distance record for both MDIQKD and all types of QKD systems, more significantly, it achieves a distance that the traditional BB84 QKD would not be able to achieve with the same detection devices even with ideal single-phone sources. For the first time, our work demonstrates that with the MDIQKD method, imperfect devices can achieve better results than what ideal sources could have achieved. This work represents a significant step towards proving and developing a feasible long-distance QKD.
description: 15 pages, 3 figures
Alternatives : an anarchist view of prisons, crime and violence
Creators: name: Lee, Michael
Publisher: name: University of Victoria Libraries
Year: 2020
Subjects: subject: Prisons
valueUri: http://id.worldcat.org/fast/1077326
subject: Criminal justice, Administration of
valueUri: http://id.worldcat.org/fast/883246
subject: Alternatives to imprisonment
valueUri: http://id.worldcat.org/fast/806191
subject: Prisoners
valueUri: http://id.worldcat.org/fast/1077103
subject: Anarchism
valueUri: http://id.worldcat.org/fast/808387
subject: Anarchists
valueUri: http://id.worldcat.org/fast/808401
subject: Prisoners--Legal status, laws, etc.
valueUri: http://id.worldcat.org/fast/1077155

description: Originally written for the political discussion bulletin Off our knees! The author proposes an alternative "anarchist" system of punishment for crimes, featuring mutually agreed solutions. In the proposed system, "caging" or banishing would be a last resort.
OpenAIRE-Nexus Scholarly Communication Services for EOSC users - ein abschließender Blick
Creators: name: Czerniak, Andreas
Publisher: name: Kolloquium Wissensinfrastruktur
Year: 2023

description: Das EU-finanzierte Projekt "OpenAIRE-Nexus - Eine zugänglichere offene Wissenschaft" (https://cordis.europa.eu/project/id/101017452/de) hatte zum Ziel, in der Welt der offenen Wissenschaft eine faire, benutzerfreundliche und offene Kommunikation sowie Informationsweitergabe zu fördern. Um Forschung zu unterstützen, müssen Inhalte und Informationen daher leicht zu finden und anzuzeigen sein. OpenAIRE Nexus stellte ein Diensteportfolio zusammen, das bei der Veröffentlichung von Forschungsergebnissen, zum Monitoring ihres Impacts und zur Verbreitung des neuen Wissens wesentlich beitragen kann. Diese in Europa und darüber hinaus bereits etablierten Dienstleistungen werden von öffentlich-rechtlichen Institutionen und Einrichtungen bereitgestellt. Ziel war es, dieses Portfolio in die European Open Science Cloud (EOSC) und die globale offene Wissenschaftsgemeinschaft einzubinden. Der erste Teil des Vortrages wird eine Übersicht über das Projekt und dessen Ziele geben. Im zweiten Teil werden beispielhaft Ergebnisse des Projektes, insbesondere solcher Arbeitspakete, an denen die Universitätsbibliothek Bielefeld beteiligt war, präsentiert. Dabei handelt sich unter anderem um die Integration von OpenAPC in den OpenAIRE Research Graphen, sowie die Bekanntmachung von OpenAPC im internationalen Kontext. Arbeiten an der Integration von Forschungsinformationssystemen (FISs), sowie Open Research Europe (ORE, https://open-research-europe.ec.europa.eu/) - der Open Access Publishing Plattform der Europäischen Kommission, gehörten gleichfalls zu den erfolgreich abgeschlossen Aufgaben.
description: Kolloquium Wissensinfrastruktur, Sommersemester 2023
Forschungsdaten veröffentlichen - Organisatorische und rechtliche Fragen
Creators: name: Böker, Elisabeth
name: Brettschneider, Peter
Publisher: name: Zenodo
Year: 2020
Subjects: Forschungsdaten
Forschungsdatenmanagement
Recht
Forschungsdaten veröffentlichen
Repositorium

description: Sie wollen Ihre Forschungsdaten veröffentlichen? Oder Sie überlegen dies zu tun? In der Präsentation "Forschungsdaten veröffentlichen - Organisatorische und rechtliche Fragen" informieren wir Sie erstens darüber, welche Gründe für eine Veröffentlichung sprechen. Zweitens bekommen Sie Einblick, welche rechtlichen Hindernisse es zu vermeiden gilt. Drittens lernen Sie, welche Repositorien sich für Ihre Veröffentlichung eignen. Zum Abschluss gehen wir auf das Lizenzieren von Daten ein. Die Module sind auch einzeln publiziert: 1. Fünf Gründe für eine Veröffentlichung von Forschungsdaten 2. Rechtliche Hindernisse vermeiden 3. Repositorien auswählen 4. Daten lizenzieren Dr. Elisabeth Böker arbeitet am Kommunikations-, Informations-, Medienzentrum der Universität Konstanz und ist Projektkoordinatorin der baden-württembergisches Landesinitiative bw2FDM. Zudem hat sie die Chefredaktion der Informationsplattform forschungsdaten.info inne.
 Peter Brettschneider arbeitet ebenfalls am Kommunikations-, Informations-, Medienzentrum der Universität Konstanz. Er ist als Fachreferent Rechtswissenschaften und Projektmitarbeiter der baden-württembergisches Landesinitiative bw2FDM tätig.
Quantum illumination using polarization-path entangled single photons for low reflectivity object detection in noisy background
Creators: name: Shafi, K. Muhammed
name: Padhye, A.
name: Chandrashekar, C. M.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Detecting object with low reflectivity embedded within a noisy background is a challenging task. Quantum correlations between pairs of quantum states of light, though are highly sensitive to background noise and losses, offer advantages over traditional illumination methods. Instead of using correlated photon pairs which are sensitive, we experimentally demonstrate the advantage of using heralded single-photons entangled in polarization and path degree of freedom for quantum illumination. In the study, the object of different reflectivity is placed along the path of the signal in a variable thermal background before taking the joint measurements and calculating the quantum correlations. We show the significant advantage of using non-interferometric measurements along the multiple paths for single photon to isolate the signal from the background noise and outperform in detecting and ranging the low reflectivity objects even when the signal-to-noise ratio is as low as 0.03. Decrease in visibility of polarization along the signal path also results in similar observations. This will have direct relevance to the development of single-photon based quantum LiDAR and quantum imaging.
description: 8 pages and 6 figures
Search for third-generation vector-like leptons in $pp$ collisions at $\sqrt{s} = 13\,\text{TeV}$ with the ATLAS detector
Creators: name: ATLAS Collaboration
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: A search for vector-like leptons in multilepton (two, three, or four-or-more electrons plus muons) final states with zero or more hadronic $τ$-lepton decays is presented. The search is performed using a dataset corresponding to an integrated luminosity of 139 fb$^{-1}$ of proton$-$proton collisions at a centre-of-mass energy of 13 TeV recorded by the ATLAS detector at the LHC. To maximize the separation of signal and background, a machine-learning classifier is used. No excess of events is observed beyond the Standard Model expectation. Using a doublet vector-like lepton model, vector-like leptons coupling to third-generation Standard Model leptons are excluded in the mass range from 130 GeV to 900 GeV at the 95% confidence level, while the highest excluded mass is expected to be 970 GeV.
description: 48 pages, author list starting on page 29, 6 figures, 11 tables, published as JHEP 07 (2023) 118. All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/EXOT-2020-07/
Short-Term Variations in the Equatorial Rotation Rate of Sunspot Groups
Creators: name: Javaraiah, J.
name: Bertello, L.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We have detected several periodicities in the solar equatorial rotation rate of sunspot groups in the Greenwich Photoheliographic Results (GPR) during the period 1931-1976, the Solar Optical Observing Network (SOON) during the period 1977-2014, and the Debrecen Photoheliographic Data (DPD) during the period 1974-2014. Our results suggest a ~250-day period in the equatorial rotation rate determined from both the Mt. Wilson Doppler-velocity data and the sunspot-group data during 1986-2007. However, a wavelet analysis reveals that this periodicity appears mostly around 1991 in the velocity data, while it is present in most of the solar cycles covered by the sunspot-group data, mainly near the minimum epochs of the solar cycles. We also found the signature of a period of ~1.4 years period in the velocity data during 1990-1995, and in the equatorial rotation rate of sunspot groups mostly around the year 1956. The equatorial rotation rate of sunspot groups reveals a strong ~1.6-year periodicity around 1933 and 1955 and a weaker one around 1976, and a strong ~1.8-year periodicity around 1943. Our analysis also suggests periodicities of ~5 years, ~7 years, and ~17 years as well as some other short-term periodicities. However, short-term periodicities are mostly present at the time of solar minima. Hence, short-term periodicities cannot be confirmed because of the larger uncertainty in the data.
description: 20 pages, 10 figures, to be published in Solar Physics
ANALYSIS OF INHERENT ANISOTROPY IN ASPHALT CONCRETE MIXTURES
Creators: name: ZEKARIYAS MUSSIE AMANU
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2020
Subjects: Asphalt Concrete, Aggregates, inherent anisotropy, orientation, internal structure, Vector magnitude, X-ray CT images.

description: Files are currently under embargo but will be publicly accessible after June 09-2021
A computational approach to exponential-type variable-order fractional differential equations
Creators: name: Garrappa, Roberto
name: Giusti, Andrea
Publisher: name: arXiv
Year: 2023
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics
subject: 26A33, 46F12, 65R10

description: We investigate the properties of some recently developed variable-order differential operators involving order transition functions of exponential type. Since the characterisation of such operators is performed in the Laplace domain it is necessary to resort to accurate numerical methods to derive the corresponding behaviours in the time domain. In this regard, we develop a computational procedure to solve variable-order fractional differential equations of this novel class. Furthermore, we provide some numerical experiments to show the effectiveness of the proposed techniques.
description: 23 pages, 13 figures