cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The impact of public sector borrowing on economic growth in Ethiopia
Creators: name: Yohannes, Haiu
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2019

description: This research was based on Debt Overhang Theory and Dual Gap Theory. This study adopted a descriptive research design; secondary data was collected in this study. The study used secondary data on external borrowing from the Ministry of Finance Ethiopia National Bureau of Statistics, and National Bank of Ethiopia, IMF website, world development indicators and World Bank data. The data was collected from 1991 to 2018, with GDP growth rate as a function of Public Debt. Data was analyzed using STATA version 14. This study is therefore an effort to determine the effect of Public Debt on Economic Growth in Ethiopia. Specifically, the study tries to answer the question Public external debt; Public domestic debt and debt servicing have any significant effect on Economic Growth. The study uses a linear regression model to analyze Ethiopian data from the economic years 1991 to 2018
(202290) John William Rycroft
Creators: name: Professions, Victorian
Publisher: name: University of Oxford
Year: 2022
Subjects: subject: 220201 Business and Labour History
subject: FOS: Philosophy, ethics and religion
subject: History
subject: 140203 Economic History
subject: FOS: Economics and business

description: This three-year research project began in January 2014 and investigated whether, during the Victorian period, the professions formed a distinct self-sustaining social group with its own mores and values. The project looked at 16,000 individuals drawn from census data for Alnwick, Brighton, Bristol, Dundee, Greenock, Leeds, Merthyr Tydfil, Morpeth, and Winchester. The research project was funded by the UK Economic & Social Research Council and was based at the Universities of Oxford and Northumbria.
The Weighted Bitcoin Lightning Network
Creators: name: Lin, Jian-Hong
name: Marchese, Emiliano
name: Tessone, Claudio J.
name: Squartini, Tiziano
Publisher: name: arXiv
Year: 2021
Subjects: subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences

description: The Bitcoin Lightning Network (BLN) was launched in 2018 to scale up the number of transactions between Bitcoin owners. Although several contributions concerning the analysis of the BLN binary structure have recently appeared in the literature, the properties of its weighted counterpart are still largely unknown. The present contribution aims at filling this gap, by considering the Bitcoin Lightning Network over a period of 18 months, ranging from 12th January 2018 to 17th July 2019, and focusing on its weighted, undirected, daily snapshot representation. As the study of the BLN weighted structural properties reveals, it is becoming increasingly 'centralised' at different levels, just as its binary counterpart: 1) the Nakamoto coefficient shows that the percentage of nodes whose degrees/strengths 'enclose' the 51% of the total number of links/total weight is rapidly decreasing; 2) the Gini coefficient confirms that several weighted centrality measures are becoming increasingly unevenly distributed; 3)the weighted BLN topology is becoming increasingly compatible with a core-periphery structure, with the largest nodes 'by strength' constituting the core of such a network, whose size keeps shrinking as the BLN evolves. Further inspection of the resilience of the weighted BLN shows that removing such hubs leads to the network fragmentation into many components, an evidence indicating potential security threats - as the ones represented by the so called 'split attacks'.
description: 18 pages, 12 figures
Holographic Computations of the Quantum Information Metric
Creators: name: Trivella, Andrea
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this note we show how the Quantum Information Metric can be computed holographically using a perturbative approach. In particular when the deformation of the conformal field theory state is induced by a scalar operator the corresponding bulk configuration reduces to a scalar field perturbatively probing the unperturbed background. We study two concrete examples: a CFT ground state deformed by a primary operator and thermofield double state in $d=2$ deformed by a marginal operator. Finally, we generalize the bulk construction to the case of a multi dimensional parameter space and show that the Quantum Information Metric coincides with the metric of the non-linear sigma model for the corresponding scalar fields.
description: 21 pages, 5 figures
Entanglement-asymmetry correspondence for internal quantum reference frames
Creators: name: de la Hamette, Anne-Catherine
name: Ludescher, Stefan L.
name: Mueller, Markus P.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In the quantization of gauge theories and quantum gravity, it is crucial to treat reference frames such as rods or clocks not as idealized external classical relata, but as internal quantum subsystems. In the Page-Wootters formalism, for example, evolution of a quantum system S is described by a stationary joint state of S and a quantum clock, where time-dependence of S arises from conditioning on the value of the clock. Here, we consider (possibly imperfect) internal quantum reference frames R for arbitrary compact symmetry groups, and show that there is an exact quantitative correspondence between the amount of entanglement in the invariant state on RS and the amount of asymmetry in the corresponding conditional state on S. Surprisingly, this duality holds exactly regardless of the choice of coherent state system used to condition on the reference frame. Averaging asymmetry over all conditional states, we obtain a simple representation-theoretic expression that admits the study of the quality of imperfect quantum reference frames, quantum speed limits for imperfect clocks, and typicality of asymmetry in a unified way. Our results shed light on the role of entanglement for establishing asymmetry in a fully symmetric quantum world.
description: 5+8 pages, 2 figures. v3: some minor clarifications and simplifications. Close to published version
Perkembangan fiksyen Melayu dari hikayat kepada novel = The development of Malay fiction from romances to the novel
Creators: name: Ismail., Yahaya
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.
The relevance of ambipolar diffusion for neutron star evolution
Creators: name: Passamonti, Andrea
name: Akgün, Taner
name: Pons, José A.
name: Miralles, Juan A.
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We study ambipolar diffusion in strongly magnetised neutron stars, with special focus on the effects of neutrino reaction rates and the impact of a superfluid/superconducting transition in the neutron star core. For axisymmetric magnetic field configurations, we determine the deviation from $β-$equilibrium induced by the magnetic force and calculate the velocity of the slow, quasi-stationary, ambipolar drift. We study the temperature dependence of the velocity pattern and clearly identify the transition to a predominantly solenoidal flow. For stars without superconducting/superfluid constituents and with a mixed poloidal-toroidal magnetic field of typical magnetar strength, we find that ambipolar diffusion proceeds fast enough to have a significant impact on the magnetic field evolution only at low core temperatures, $T \lesssim 1-2\times10^8$ K. The ambipolar diffusion timescale becomes appreciably shorter when fast neutrino reactions are present, because the possibility to balance part of the magnetic force with pressure gradients is reduced. We also find short ambipolar diffusion timescales in the case of superconducting cores for $T \lesssim 10^9$ K, due to the reduced interaction between protons and neutrons. In the most favourable scenario, with fast neutrino reactions and superconducting cores, ambipolar diffusion results in advection velocities of several km/kyr. This velocity can substantially reorganize magnetic fields in magnetar cores, in a way that can only be confirmed by dynamical simulations.
description: 14 pages, 11 figures, version accepted for publication in MNRAS
title: Rôle du langage dans l'enseignement et l'apprentissage des sciences
title: Rôle du langage dans l'enseignement et l'apprentissage des sciences
titleType: AlternativeTitle
Creators: name: Weiss, Max
name: Xavier Campos De Medeiros, Guilherme
Publisher: name: Unknown
Year: 0
Subjects: subject: Démarches scientifique
subject: débat scientifique
subject: argumentation
subject: changement de position énonciative
subject: interactions langagières
subject: conflits sociaux cognitifs

description: Notre travail porte sur le rôle du langage dans l’enseignement et l'apprentissage des sciences de la nature. Dans un premier temps, nous nous sommes intéressés à la plus-value de l’argumentation dans le cadre du débat scientifique. Nous avons pu constater que ce dispositif didactique favorise un accès à une certaine forme de socialisation scientifique, à travers le changement de positionnement énonciatif des élèves. Nous avons donc décidé de relever et de classer les différentes hypothèses des élèves dans trois niveaux de formulation différents. Cela a été l’occasion de témoigner de leur progression entre les trois séances d’enseignement, mais également de pouvoir réguler leurs interventions afin de les faire rentrer dans un registre plus scientifique. Par la suite, nous nous sommes également intéressés au rôle que l’enseignant·e assumait lors de la mise en commun des hypothèses des élèves. Grâce à l’analyse des interactions langagières que nous avons menées sur le terrain, nous avons pu identifier un certain nombre de gestes professionnels nécessaires afin de guider les élèves vers des apprentissages plus significatifs. De plus, ces formes d’étayage permettent aux élèves de rompre avec leurs conceptions naïves et de construire des savoirs raisonnés en classe de sciences. Finalement, nous avons également abordé les éventuelles limites de notre recherche et avons réussi à déboucher sur un potentiel prolongement de ce travail.
(202293) John Ascham Rycroft
Creators: name: Professions, Victorian
Publisher: name: University of Oxford
Year: 2022
Subjects: subject: 220201 Business and Labour History
subject: FOS: Philosophy, ethics and religion
subject: History
subject: 140203 Economic History
subject: FOS: Economics and business

description: This three-year research project began in January 2014 and investigated whether, during the Victorian period, the professions formed a distinct self-sustaining social group with its own mores and values. The project looked at 16,000 individuals drawn from census data for Alnwick, Brighton, Bristol, Dundee, Greenock, Leeds, Merthyr Tydfil, Morpeth, and Winchester. The research project was funded by the UK Economic & Social Research Council and was based at the Universities of Oxford and Northumbria.
Determinants of Microfinance Institutions Loan Portfolios Quality: Empirical Evidence from Ethiopia
Creators: name: Adugna, Sara
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2014

description: This s tudy e xamined d eterminants of l oan por tfolios qual ity, us ing pane l dat a of fourteen (14) MFIs from the period 2003- 2012. The study employed four dependent variables as proxies for loan por tfolios qual ity, nam ely: l oan l oss r ate (LLR), por tfolio at r isk o ver 3 0-days ( PAR- 30days), por tfolio at r isk ov er 90 -days ( PAR-90days) and write-off r atio (WO R).This st udy i s crucial f rom t he fact t hat t here i s l imited r esearch on M FIs l oan por tfolios qual ity us ing quantitative appr oach i n E thiopia. Based on t he pool ed o rdinary l east squares (OLS) and random effects generalized least squares, the study finds an i nstitution size (LnTA) is negatively and s ignificantly i nfluences L LR and W OR. O perating e xpense (OPPEXP) has a ne gative significant r elationship with L LR, P AR-30days and W OR. A ge of t he M FIs ha s a pos itive significant r elationship with P AR-90days. P ercentage of women bor rowers (WOMBOR) has a positive s ignificant i mpact on P AR-30days. D eposit t o l oans (DTL) pos itively and s ignificantly influences LLR and WOR. Gross loan portfolio/ total asset (GLP/TA) has a negative significant impact on L LR and W OR. V oluntary s avings ( LnVOLSAV) has a ne gative s ignificant relationship with LLR, PAR-90days and W OR. The regression results also show that Return on equity ( ROE) has a ne gative s ignificant r elationship with L LR, P AR-30days, P AR-90days and WOR. Change in growth national income (CH-GNI) negatively and significantly influences PAR- 30days and P AR-90days. The s tudy finds i nsignificant r esults on l everage and i nflation. Si nce MFIs pr ovide f inancial s ervices t o t he poor pe ople t hose who c annot pr ovide c ollateral, t hus they m ay hi ghly f ace de fault r isk when bo rrowers f ail t o r epay t heir obl igations a s pe r t he agreement. A ccordingly, t he f indings of t he s tudy may ha ve i mplications f or M FIs and pol icy makers in that it provides hint on some important determinants of loan portfolios quality
Nucleon's axial-vector form factor in the hard-wall AdS/QCD model
Creators: name: Mamedov, Shahin
name: Sirvanli, Berin Belma
name: Atayev, Ibrahim
name: Huseynova, Narmin
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The axial-vector form factor of the nucleons is considered in the framework of hard-wall model of holographic QCD. A new interaction term between the bulk gauge and matter fields was included into the interaction Lagrangian. We obtain the axial-vector form factor of nucleons in the boundary QCD from the bulk action using AdS/CFT correspondence. The momentum square dependence of the axial-vector form factor is analysed numerically.
description: 17 pages, improved version in print in Int.Jour.Teor.Phys
Inverse source problem for a one-dimensional time-fractional diffusion equation and unique continuation for weak solutions
Creators: name: Li, Zhiyuan
name: Liu, Yikan
name: Yamamoto, Masahiro
Publisher: name: arXiv
Year: 2021
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 35K20, 35R30, 35B53

description: In this paper, we obtain the sharp uniqueness for an inverse $x$-source problem for a one-dimensional time-fractional diffusion equation with a zeroth-order term by the minimum possible lateral Cauchy data. The key ingredient is the unique continuation which holds for weak solutions.
description: 24 pages
Model-Independent Source Imaging Using Two-Pion Correlations in (2 to 8)A GeV Au + Au Collisions
Creators: name: Ajitanand, N. N.
name: Alexander, J.
name: Anderson, M.
name: Best, D.
name: Panitkin, S. Y.
Publisher: name: The American Physical Society
Year: 2001
Subjects: subject: 530

description: Physical Review Letters
(202294) Peter Neville Rycroft
Creators: name: Professions, Victorian
Publisher: name: University of Oxford
Year: 2022
Subjects: subject: 220201 Business and Labour History
subject: FOS: Philosophy, ethics and religion
subject: History
subject: 140203 Economic History
subject: FOS: Economics and business

description: This three-year research project began in January 2014 and investigated whether, during the Victorian period, the professions formed a distinct self-sustaining social group with its own mores and values. The project looked at 16,000 individuals drawn from census data for Alnwick, Brighton, Bristol, Dundee, Greenock, Leeds, Merthyr Tydfil, Morpeth, and Winchester. The research project was funded by the UK Economic & Social Research Council and was based at the Universities of Oxford and Northumbria.
On the oscillation-driven cosmological expansion at the post-inflation stage
Creators: name: Koutvitsky, Vladimir A.
name: Maslov, Eugene M.
Publisher: name: arXiv
Year: 2016
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences
subject: 98.80.Jk, 98.80.Cq, 04.25.-g, 04.40.-b

description: Dynamics of the inflaton scalar field oscillating around a minimum of the singular potentials in the expanding Universe is investigated. Asymptotic formulas are obtained describing the cosmological expansion at the late times. The problem of stability of the oscillations considered and the related phenomenon of the field fragmentation are briefly discussed.
description: 8 pages, 4 figures
Chaucer and the natural world : a study based on selected Canterbury tales
Creators: name: Shields, Alison Margaret.
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.
Perception on factor affecting the efficiency of income tax administration in large tax payer's branch office of Ethiopia revenue and custom authority
Creators: name: Mintwab, Moges
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2017

description: The goal of this research is to study on perception on factor affecting the efficiency of income tax administration in large tax payer branch office of ERCA. Employees, managers and tax payers of large tax payer's branch office were the target population of the study. The total population of this study is 1156 tax payer and 53assessment, enforcement, collection, customer service officers and 50 auditors. To achieve this objective, the researcher used primary and secondary sources of data. In order to get primary information, questionnaire and interview was taken. As important as the primary data, the researcher also collected essential data from secondary sources .Data that obtained through review of such documents help to address the research objectives of the study and also the researcher used non-probability sampling techniques. Data collect from document review and interview interpreted qualitatively. The data collected and analyzed presented by using the following data presentation tools: Tables, histogram along with sufficient interpretations. Data also analyzed on quantitative basis using Pearson's correlation, multiple linear regression analysis and descriptive statistics. The researcher undertakes the diagnostic tests for the assumption of classical linear regression model (CLRM). Based on the analysis and discussion of the research, it can be concluded that the tax knowledge, income tax law complexity and procedures and compliance rate has a significant effect on tax administration efficiency. The researcher conclude that the new income tax law clear, simple and understandable than the previous law. The branch has fewer arrears of income tax and the compliance rate also shows that there is tax gap. To improve this continuous follow up should be made to collect the tax due and enforce the tax payer to comply with the tax law. In addition, after the income tax reform implemented the income tax revenues have increased significantly. However, the income tax ratios do not increase accordingly.
(202296) William Ridley Makepeace
Creators: name: Professions, Victorian
Publisher: name: University of Oxford
Year: 2022
Subjects: subject: 220201 Business and Labour History
subject: FOS: Philosophy, ethics and religion
subject: History
subject: 140203 Economic History
subject: FOS: Economics and business

description: This three-year research project began in January 2014 and investigated whether, during the Victorian period, the professions formed a distinct self-sustaining social group with its own mores and values. The project looked at 16,000 individuals drawn from census data for Alnwick, Brighton, Bristol, Dundee, Greenock, Leeds, Merthyr Tydfil, Morpeth, and Winchester. The research project was funded by the UK Economic & Social Research Council and was based at the Universities of Oxford and Northumbria.
Asymptotic behavior of solutions to the heat equation on noncompact symmetric spaces
Creators: name: Anker, Jean-Philippe
name: Papageorgiou, Effie
name: Zhang, Hong-Wei
Publisher: name: arXiv
Year: 2021
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 22E30, 35B40, 35K05, 58J35

description: This paper is twofold. The first part aims to study the long-time asymptotic behavior of solutions to the heat equation on Riemannian symmetric spaces $G/K$ of noncompact type and of general rank. We show that any solution to the heat equation with bi-$K$-invariant $L^{1}$ initial data behaves asymptotically as the mass times the fundamental solution, and provide a counterexample in the non bi-$K$-invariant case. These answer problems recently raised by J.L. Vázquez. In the second part, we investigate the long-time asymptotic behavior of solutions to the heat equation associated with the so-called distinguished Laplacian on $G/K$. Interestingly, we observe in this case phenomena which are similar to the Euclidean setting, namely $L^1$ asymptotic convergence with no bi-$K$-invariance condition and strong $L^{\infty}$ convergence.
description: To appear in J. Funct. Anal
Determinants of non-performing loans in commercial banks in Ethiopia
Creators: name: Berhanu, Belay
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2019

description: This study examines the determinants of non-performing loans evidenced by commercial banks of Ethiopia. The study uses explanatory research design and quantitative research approach with secondary panel data utilized over the study period 2009-2018(10 years). More specifically, the study adopts an ordinary least squares (OLS) model. The finding of the study reveals that; operational efficiency measured by the cost to income ratio, financial performance measured by return on asset, loan to deposit ratio measured by total loan to total deposit, and capital adequacy ratio found the most significant variables affects the banks' non-performing loan from bank-specific factors. While loan loss provision and bank size found insignificant in determining the non-performing loan of banks. Furthermore, from macro-economic variables; inflation is the only significant variable that determines the non-performing loan of the commercial banks in Ethiopia. On the other hand, variables like GDP growth rate, lending interest rate, and exchange rate are found as insignificant variables in determining non-performing loans. This study suggests that Ethiopian Commercial Banks shall search an investment opportunity in order to diversify its source of revenue and deliberately shift its source from the traditional income (interest) to different sources of income in a bid to decrease non-performing loans of the banks.
Corrected quantum walk for optimal Hamiltonian simulation
Creators: name: Berry, Dominic W.
name: Novo, Leonardo
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We describe a method to simulate Hamiltonian evolution on a quantum computer by repeatedly using a superposition of steps of a quantum walk, then applying a correction to the weightings for the numbers of steps of the quantum walk. This correction enables us to obtain complexity which is the same as the lower bound up to double-logarithmic factors for all parameter regimes. The scaling of the query complexity is $O\left( τ\frac{\log\logτ}{\log\log\logτ} + \log(1/ε) \right)$ where $τ:= t\|H\|_{\max}d$, for $ε$ the allowable error, $t$ the time, $\|H\|_{\max}$ the max-norm of the Hamiltonian, and $d$ the sparseness. This technique should also be useful for improving the scaling of the Taylor series approach to simulation, which is relevant to applications such as quantum chemistry.
description: 18 pages, published version
Skyrmion-skyrmion interaction induced by itinerant electrons in a ferromagnetic strip
Creators: name: Iroulart, E.
name: Rosales, H. D.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Magnetic skyrmions are promising spin textures for building next-generation magnetic memories and spintronic devices. Nevertheless, one of the major challenges in realizing skyrmion-based devices is the stabilization of ordered arrays of these spin textures in different geometries. Here we numerically study the skyrmion-skyrmion interaction potential that arises due to the dynamics of itinerant electrons coupled to the magnetic texture in a ferromagnetic background with racetrack geometry. We consider different topological textures (ferromagnetic (FM) and antiferromagnetic (AFM)), namely: skyrmions, antiskyrmions and biskyrmions. We show that at low electron filling, for sufficiently short separation, the skyrmions strongly couple each other yielding a bound-state bound by electronic dynamics. However, when the filling is increased, the interaction potential energy presents local minima at specific values of the skyrmion-skyrmion distance. Each of these local minima correspond to energetically stable positions of skyrmions which are "protected" by well defined energy barriers. By inspecting the local charge density, we find that in the case of AFM skyrmions, the local antiferromagnetic nature prevents electronic penetration into the core, allowing the AFM skyrmions to be seen as infinite potential barriers for electrons.
description: 8 pages, 8 figures. Accepted for publication in Journal of Physics: Condensed Matter (2022)
Some constraints on relative clause formation in English and German
Creators: name: Hiscock, Peter E.J.
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.
Classical spin liquids in stacked triangular lattice Ising antiferromagnets
Creators: name: Liu, D. T.
name: Burnell, F. J.
name: Jaubert, L. D. C.
name: Chalker, J. T.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We study Ising antiferromagnets that have nearest-neighbour interactions on multilayer triangular lattices with frustrated ($abc$ and $abab$) stacking, and make comparisons with the unfrustrated ($aaa$) stacking. If interlayer couplings are much weaker than in-plane ones, the paramagnetic phase of models with frustrated stackings has a classical spin-liquid regime at low temperature, in which correlations are strong both within and between planes, but there is no long-range order. We investigate this regime using Monte Carlo simulations and by mapping the spin models to coupled height models, which are treated using renormalisation group methods and an analysis of the effects of vortex excitations. The classical spin-liquid regime is parametrically wide at small interlayer coupling in models with frustrated stackings. By contrast, for the unfrustrated stacking there is no extended regime in which interlayer correlations are strong without three-dimensional order.
description: 25 pages, 21 figures; version to appear in Physical Review B, includes minor corrections
Self-Ensembling GAN for Cross-Domain Semantic Segmentation
Creators: name: Xu, Yonghao
name: He, Fengxiang
name: Du, Bo
name: Tao, Dacheng
name: Zhang, Liangpei
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Deep neural networks (DNNs) have greatly contributed to the performance gains in semantic segmentation. Nevertheless, training DNNs generally requires large amounts of pixel-level labeled data, which is expensive and time-consuming to collect in practice. To mitigate the annotation burden, this paper proposes a self-ensembling generative adversarial network (SE-GAN) exploiting cross-domain data for semantic segmentation. In SE-GAN, a teacher network and a student network constitute a self-ensembling model for generating semantic segmentation maps, which together with a discriminator, forms a GAN. Despite its simplicity, we find SE-GAN can significantly boost the performance of adversarial training and enhance the stability of the model, the latter of which is a common barrier shared by most adversarial training-based methods. We theoretically analyze SE-GAN and provide an $\mathcal O(1/\sqrt{N})$ generalization bound ($N$ is the training sample size), which suggests controlling the discriminator's hypothesis complexity to enhance the generalizability. Accordingly, we choose a simple network as the discriminator. Extensive and systematic experiments in two standard settings demonstrate that the proposed method significantly outperforms current state-of-the-art approaches. The source code of our model is available online (https://github.com/YonghaoXu/SE-GAN).
High-Dimensional Disorder-Driven Phenomena in Weyl Semimetals, Semiconductors and Related Systems
Creators: name: Syzranov, S. V.
name: Radzihovsky, L.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: It is commonly believed that a non-interacting disordered electronic system can undergo only the Anderson metal-insulator transition. It has been suggested, however, that a broad class of systems can display disorder-driven transitions distinct from Anderson localisation that have manifestations in the disorder-averaged density of states, conductivity and other observables. Such transitions have received particular attention in the context of recently discovered 3D Weyl and Dirac materials but have also been predicted in cold-atom systems with long-range interactions, quantum kicked rotors and all sufficiently high-dimensional systems. Moreover, such systems exhibit unconventional behaviour of Lifshitz tails, energy-level statistics and ballistic-transport properties. Here we review recent progress and the status of results on non-Anderson disorder-driven transitions and related phenomena.
description: Invited review for The Annual Reviews of Condensed Matter Physics, vol. 9; 26 pages, 9 figures, 1 table
Dunkl-Klein-Gordon equation in three-dimensions: The Klein-Gordon oscillator and Coulomb Potential
Creators: name: Hamil, B.
name: Lütfüoğlu, B. C.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Recent studies show that deformations in quantum mechanics are inevitable. In this contribution, we consider a relativistic quantum mechanical differential equation in the presence of Dunkl operator-based deformation and we investigate solutions for two important problems in three-dimensional spatial space. To this end, after introducing the Dunkl quantum mechanics, we examine the Dunkl-Klein-Gordon oscillator solutions with the Cartesian and spherical coordinates. In both coordinate systems, we find that the differential equations are separable and their eigenfunctions can be given in terms of the associate Laguerre and Jacobi polynomials. We observe how the Dunkl formalism is affecting the eigenvalues as well as the eigenfunctions. As a second problem, we examine the Dunkl-Klein-Gordon equation with the Coulomb potential. We obtain the eigenvalue, their corresponding eigenfunctions, and the Dunkl-fine structure terms.
description: 8 pages, 1 fig
Determinants Of Dividend Policy of Banks in Ethiopia
Creators: name: Hilemariam, Simegn
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2013

description: This study investigates the determinants of dividend policy of banks in Ethiopia. Based on the previous studies the independent variables; current earning, previous year's dividend, liquidity, leverage, loan loss provision and bank's age are selected .The panel data for ten years time period (2002-2011) for five banks was collected and analysis through using the Panel Least Square method with the fixed effect model . The regression result shows that current earning, previous year's dividend, bank's age and loan –loss provisions have positive and statistically significant impact on the banks dividend payments where as liquidity has negative impacts and leverage is not an important variable for the banks dividend decision. Therefore the variables, current earning, previous year's dividend payment, loan loss provision and age are the major factors that determine the banks dividend decision. Unexpectedly liquidity has a negative impact. In Ethiopia, the banks dividend decisions are highly influenced by their current earning and previous year's dividend payments. The result is in line with the signalling theory and banks in Ethiopia are attempted to have a stable dividend policy. Keyword: dividend policy, dividend policy determinants, dividend stability and signaling theory
Quantum dot attached to superconducting leads: Relation between symmetric and asymmetric coupling
Creators: name: Kadlecová, Alžběta
name: Žonda, Martin
name: Novotný, Tomáš
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We study the Anderson single-level quantum dot attached to two BCS superconducting leads with the same gap size. We reveal that a system with asymmetric tunnel coupling to the leads ($Γ_{L}\neqΓ_{R}$) can be related to the symmetric system with the same net coupling strength $Γ=Γ_{L}+Γ_{R}$. Surprisingly, it is the symmetric case which is the most general, meaning that all physical quantities in case of asymmetric coupling are fully determined by the symmetric ones. We give ready-to-use conversion formulas for the $0-π$ phase transition boundary, on-dot quantities, and the Josephson current, and illustrate them on the NRG results of Oguri, Tanaka and Bauer [Phys. Rev. B 87, 075432 (2013)] for the three-terminal setup. We apply our theory to the recent $0-π$ transition measurement of Delagrange et al. [Phys. Rev. B 93, 196437 (2016)] and determine the asymmetry of the experimental setup from the measured transition width. Finally, we establish that the widely assumed Kondo "universality" of physical quantities depending only on the ratio of the Kondo temperature and the superconducting gap $T_{K}/Δ$ cannot hold for asymmetric junctions.
description: 10 pages, 5 figures v3: revised and extended version; sec. III and Appendix B were largely modified, abstract and conclusions have been updated, minor text and graphical improvements
(202288) Lloyds Bank Limited
Creators: name: Professions, Victorian
Publisher: name: University of Oxford
Year: 2022
Subjects: subject: 220201 Business and Labour History
subject: FOS: Philosophy, ethics and religion
subject: History
subject: 140203 Economic History
subject: FOS: Economics and business

description: This three-year research project began in January 2014 and investigated whether, during the Victorian period, the professions formed a distinct self-sustaining social group with its own mores and values. The project looked at 16,000 individuals drawn from census data for Alnwick, Brighton, Bristol, Dundee, Greenock, Leeds, Merthyr Tydfil, Morpeth, and Winchester. The research project was funded by the UK Economic & Social Research Council and was based at the Universities of Oxford and Northumbria.
Adding a spin to Kerker's condition: arbitrary scattering direction tuning of nano-antennas with designed excitation
Creators: name: Wei, Lei
name: Bhattacharya, Nandini
name: Urbach, H. Paul
Publisher: name: arXiv
Year: 2016
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We describe a method to control the directional scattering of a high index dielectric nanosphere, which utilizes the unique focusing properties of an azimuthally polarized phase vortex and a radially polarized beam to independently excite insde the nanosphere a spinning magnetic dipole and a linearly polarized electric dipole mode normal to the magnetic dipole. We show that by simply adjusting the phase and amplitude of the field on the exit pupil of the optical system, the scattering of the nanosphere can be tuned to any direction within a plane and the method works over a broad wavelength range.
Constraints on the origins of hypervelocity stars: velocity distribution, mergers and star-formation history
Creators: name: Generozov, Aleksey
name: Perets, Hagai B.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: In recent years surveys have identified several dozen B stars in the Milky Way halo moving faster than the local escape speed. The origin of most of these hypervelocity stars (HVSs) is still poorly constrained. Here we show that the velocity distribution, and in particular the deficiency in >700 km/s HVSs is inconsistent with binary disruptions by the massive black hole (MBH) in the Galactic Centre. This conclusion holds in the full and empty loss cone regime, and for secular instabilities in eccentric disks. Accounting for multiple close encounters between binaries and the MBH, does not qualitatively change the results. Moreover, there is no observed counterpart population in the Galactic Centre that is consistent with the HVSs. The star-formation history could be tuned explain the HVS velocity distribution, but this tuning would produce a mismatch with the observed HVS flight times. Frequent stellar collisions of the binary components due to interactions with the MBH do not significantly impact the velocity distribution in the Galactic halo. Such collisions, however, can leave observable remnants in the Galactic Centre, and potentially explain the origins of G2-like dust clouds.
description: 11 pages, 10 figures, accepted to MNRAS. This is a pre-copyedited, author-produced PDF of an article accepted for publication in MNRAS following peer review. The version of record [MNRAS, 513, 4257] is available online at DOI:10.1093/mnras/stac1108
On Markov–up processes and their recurrence properties
Creators: name: A.Yu. Veretennikov
name: M.A. Veretennikova
Publisher: name: Reliability: Theory & Applications
Year: 2022
Subjects: Markov-up process
recurrence

description: A simple model of the new notion of “Markov up” processes is proposed; its positive recurrence and ergodic properties are shown under the appropriate conditions. A one-dimensional process in discrete time moves upwards as if it were Markov, and goes down in a more complicated way, remembering all its past from the moment of its “u-turn” down. Also, it is assumed that in some sense its move downwards becomes more and more probable after each step in this direction.
On Markov--up processes and their recurrence properties
Creators: name: Veretennikov, Alexander
name: Veretennikova, Maria
Publisher: name: arXiv
Year: 2021
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 60K15

description: A simple model of the new notion of "Markov up" processes is proposed; its positive recurrence and ergodic properties are shown under the appropriate conditions.
description: 24 pages, 4 references
Effect of interactions on quantum-limited detectors
Creators: name: Skorobagatko, Gleb
name: Bruch, Anton
name: Kusminskiy, Silvia Viola
name: Romito, Alessandro
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We consider the effect of electron-electron interactions on a voltage biased quantum point contact in the tunneling regime used as a detector of a nearby qubit. We model the leads of the quantum point contact as Luttinger liquids, incorporate the effects of finite temperature and analyze the detection-induced decoherence rate and the detector efficiency, $Q$. We find that interactions generically reduce the induced decoherence along with the detector's efficiency, and strongly affect the relative strength of the decoherence induced by tunneling and that induced by interactions with the local density. With increasing interaction strength, the regime of quantum-limited detection ($Q=1$) is shifted to increasingly lower temperatures or higher bias voltages respectively. For small to moderate interaction strengths, $Q$ is a monotonously decreasing function of temperature as in the non-interacting case. Surprisingly, for sufficiently strong interactions we identify an intermediate temperature regime where the efficiency of the detector increases with rising temperature.
description: Final version as published
The effect of Capital Structure on financial performance of Construction Companies in Addis Ababa, Ethiopia
Creators: name: Maru, Telila
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2018

description: The topic of capital structure has been widely explored as an area of study. Many studies have tried to identify the optimum capital structure that would allow profit maximization for companies. However, with capital structure, there have been many divergent findings due to different sectors exhibiting different behaviors and model that attempt to establish relationship between capital structure and performance. This research therefore, seeks to examine the effect of capital structure on financial performance of 16 grade one general contractors in Addis Ababa in the year 2012 -2017. The objective of this study is to determine the effect of capital structure on financial performance. The researcher used secondary data from audited financial statements of grade one general contractors. Quantitative methodology using random sampling was employed and the data collected were analyzed using E-views 8 econometric software to come up with descriptive, regression and correlation results. Diagnostics tests such as normality test, correlation, autocorrelation, multi co linearity and hetero scedasticity test were conducted to ensure that the data suits the basic assumptions of classical linear regression model.The regression result show that Short term debt to asset had statistically significant and positive relationship with financial performance (measured by ROA) at 5 % significance level, whereas long term debt to asset had statistically significant positive effect on financial performance of construction companies. Besides, Interest coverage ratio, tangibility and asset size also had statistically significant and positive relationship with financial performance. The findings also showed a negative significant relationship between debts to equity with financial performance. Thus, the study concluded that data from GC1 companies result mostly appear to support Trade-off theories of capital structure. The findings revealed that capital structure has statistically significant effect on financial performance of construction companies. Finally, the study recommended that construction companies in Ethiopia should employ an appropriate mix of capital structure and attention should be given for significant variables in order to increase the financial performance.
(202289) John Reginald Rycroft
Creators: name: Professions, Victorian
Publisher: name: University of Oxford
Year: 2022
Subjects: subject: 220201 Business and Labour History
subject: FOS: Philosophy, ethics and religion
subject: History
subject: 140203 Economic History
subject: FOS: Economics and business

description: This three-year research project began in January 2014 and investigated whether, during the Victorian period, the professions formed a distinct self-sustaining social group with its own mores and values. The project looked at 16,000 individuals drawn from census data for Alnwick, Brighton, Bristol, Dundee, Greenock, Leeds, Merthyr Tydfil, Morpeth, and Winchester. The research project was funded by the UK Economic & Social Research Council and was based at the Universities of Oxford and Northumbria.
Experimental realization of the active convolved illumination imaging technique for enhanced signal-to-noise ratio
Creators: name: Adams, Wyatt
name: Ghoshroy, Anindya
name: Guney, Durdu O.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Optics (physics.optics)
subject: Image and Video Processing (eess.IV)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: FOS: Physical sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Imaging is indispensable for nearly every field of science, engineering, technology, and medicine. However, measurement noise and stochastic distortions pose fundamental limits to accessible spatiotemporal information despite impressive tools such as SIM, PALM/STORM, and STED microscopy. How to combat this challenge ideally has been an open question for decades. Inspired by a "virtual gain" technique to compensate losses in metamaterials, "active convolved illumination" has been recently proposed to significantly improve the signal-to-noise ratio, hence data acquisition. In this technique, the light pattern of the object is superimposed with a correlated auxiliary pattern, the function of which is to reverse the adverse effect of noise and random distortion based on their spectral characteristics. Despite enormous implications in statistics, an experimental realization of this novel technique has been lacking to date. Here, we present the first experimental demonstration. We find that the active convolved illumination does not only boost the resolution limit and image contrast, but also the resistance to pixel saturation. The results confirm the previous theories and opens up new horizons in a wide range of disciplines from atmospheric sciences, seismology, biology, statistical learning, and information processing to quantum noise beyond the fundamental boundaries.
description: 16 pages, 9 figures