cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Spin-Orbit Interactions and the Nematicity Observed in the Fe-Based Superconductors
Creators: name: Johnson, P. D.
name: Yang, H. -B.
name: Rameau, J. D.
name: Gu, G. D.
name: Pan, Z. -H.
name: Valla, T.
name: Weinert, M.
name: Fedorov, A. V.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: High-resolution angle-resolved photoelectron spectroscopy is used to examine the electronic band structure of FeTe$_{0.5}$Se$_{0.5}$ near the Brillouin zone center. A consistent separation of the $α_{1}$ and $α_{2}$ bands is observed with little $k_{z}$ dependence of the $α_{1}$ band. First-principles calculations for bulk and thin films demonstrate that the antiferromagnetic coupling between the Fe atoms and hybridization-induced spin-orbit effects lifts the degeneracy of the Fe $d_{xz}$ and $d_{yz}$ orbitals at the zone center leading to orbital ordering. These experimental and computational results provide a natural microscopic basis for the nematicity observed in the Fe-based superconductors.
description: 11 pages, 4 figures, 20 references
Entwicklung neuer katalytischer Umsetzungen durch frustrierte Lewis-Paare und Lewis-Supersäuren
Creators: name: Köring, Laura
Publisher: name: Universität Paderborn
Year: 2023

description: Die Erschließung neuer katalytischer Systeme ist ein wichtiges Forschungsgebiet zur Ermöglichung ressourcensparender chemischer Prozesse. Die vorliegende Arbeit befasst sich mit der Entwicklung neuer katalytischer Umsetzungen durch frustrierte Lewis-Paare (FLP) und Lewis-Supersäuren und liefert damit einen wichtigen Beitrag zur Nachhaltigkeit in der Chemie. Im ersten Teil der Arbeit konnte eine metallfreie Reduktion von sekundären Amiden unter Verwendung von molekularem Wasserstoff als Reduktionsmittel erstmals als Eintopfreaktion durchgeführt werden. Indem neue Phosphor(V)- bzw. FLP-katalysierte Reaktionen miteinander vereint wurden, konnte eine Vielzahl von sekundären Aminen in sehr guten Ausbeuten erhalten werden. Im zweiten Teil der Arbeit wurden Lewis-Supersäuren als effiziente Katalysatoren für eine bislang unbeschriebene Umsetzung unreaktiver Pentafluorsulfanylverbindungen zu verschiedenen Funktionalitäten erschlossen. Es konnten außerdem neue Ferrocenyl-substituierte Borane hergestellt und zu den entsprechenden Ferroceniumboranen oxidiert werden. Die dadurch erhöhte Lewis-Acidität steigert signifikant die Aktivität dieser Katalysatoren in einer Epoxid-Umlagerung zur Bildung von Aldehyden.
description: The discovery of new catalytic systems is an important area of research to enable sustainable chemical processes. This work provides a valuable contribution to this effort by developing new catalytic conversions through frustrated Lewis pairs (FLP) and Lewis superacids. In the first part of the work, a metal free reduction of secondary amides using molecular hydrogen as a reducing agent was carried out in a one-pot reaction for the first time. By combining novel phosphorus(V) and FLP catalyzed reactions, a variety of secondary amines were obtained in very good yields. In the second part, Lewis superacids were employed as efficient catalysts to achieve previously undescribed conversions of stable pentafluorosulfanyl compounds to various functionalities. Further, novel ferrocenyl-substituted boranes were prepared and oxidized to the corresponding ferrocenium boranes. The resulting increased Lewis acidity significantly enhances the activity of these catalysts in an epoxide rearrangement to form aldehydes.
Designing Observables for Quantum Interference in Jets at Subleading Color
Creators: name: Larkoski, Andrew J.
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: Nuclear Experiment (nucl-ex)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The large-$N_c$ or topologically planar limit of gauge theories can be considered as a classical limit because all gauge bosons are distinguishable particles and therefore cannot exhibit interference. Quantum effects due to the flow of color therefore arise starting at subleading in $1/N_c$. We introduce kinematic observables explicitly sensitive to effects at subleading color formed from the ratio of interfering to squared color-ordered amplitudes. Such observables are in general not infrared and collinear safe, so we introduce angular observables defined from appropriate multi-point energy correlators motivated by the form of color-ordered amplitudes. We demonstrate that color interference effects are manifest as sinusoidal oscillation in the simplest system, a collinear jet with three particles, and show the limitations of predicting this observable in all-purpose, leading-color parton shower Monte Carlos.
description: 19 pages, 5 figures; v2: updated comparison to parton shower simulation; v3: title change and other minor changes, SciPost version
The investment performance of unit trusts and mutual funds in Australia for the period 1969 to 1978
Creators: name: Robson, Graeme Neville.
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.
Highly tuneable hole quantum dots in Ge-Si core-shell nanowires
Creators: name: Brauns, Matthias
name: Ridderbos, Joost
name: Li, Ang
name: van der Wiel, Wilfred G.
name: Bakkers, Erik P. A. M.
name: Zwanenburg, Floris
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We define single quantum dots of lengths varying from 60 nm up to nearly half a micron in Ge-Si core-shell nanowires. The charging energies scale inversely with the quantum dot length between 18 and 4 meV. Subsequently, we split up a long dot into a double quantum dot with a separate control over the tunnel couplings and the electrochemical potential of each dot. Both single and double quantum dot configurations prove to be very stable and show excellent control over the electrostatic environment of the dots, making this system a highly versatile platform for spin-based quantum computing.
The Elliptic Hall algebra and the deformed Khovanov Heisenberg category
Creators: name: Cautis, Sabin
name: Lauda, Aaron D.
name: Licata, Anthony
name: Samuelson, Peter
name: Sussan, Joshua
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Algebra (math.QA)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: 81R10, 20C08, 17B65, 18D10

description: We give an explicit description of the trace, or Hochschild homology, of the quantum Heisenberg category defined by Licata and Savage. We also show that as an algebra, it is isomorphic to "half" of a central extension of the elliptic Hall algebra of Burban and Schiffmann, specialized at $σ= \barσ^{-1} = q$. A key step in the proof may be of independent interest: we show that the sum (over $n$) of the Hochschild homologies of the positive affine Hecke algebras $\mathrm{AH}_n^+$ is again an algebra, and that this algebra injects into both the elliptic Hall algebra and the trace of the $q$-Heisenberg category. Finally, we show that a natural action of the trace algebra on the space of symmetric functions agrees with the specialization of an action constructed by Schiffmann and Vasserot using Hilbert schemes.
description: 49 pages, numerous figures
The bulk van der Waals layered magnet CrSBr is a quasi-1D material
Creators: name: Klein, Julian
name: Pingault, Benjamin
name: Florian, Matthias
name: Heißenbüttel, Marie-Christin
name: Steinhoff, Alexander
name: Song, Zhigang
name: Torres, Kierstin
name: Dirnberger, Florian
name: Curtis, Jonathan B.
name: Weile, Mads
name: Penn, Aubrey
name: Deilmann, Thorsten
name: Dana, Rami
name: Bushati, Rezlind
name: Quan, Jiamin
name: Luxa, Jan
name: Sofer, Zdenek
name: Alù, Andrea
name: Menon, Vinod M.
name: Wurstbauer, Ursula
name: Rohlfing, Michael
name: Narang, Prineha
name: Lončar, Marko
name: Ross, Frances M.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Correlated quantum phenomena in one-dimensional (1D) systems that exhibit competing electronic and magnetic order are of strong interest for studying fundamental interactions and excitations, such as Tomonaga-Luttinger liquids and topological orders and defects with properties completely different from the quasiparticles expected in their higher-dimensional counterparts. However, clean 1D electronic systems are difficult to realize experimentally, particularly magnetically ordered systems. Here, we show that the van der Waals layered magnetic semiconductor CrSBr behaves like a quasi-1D material embedded in a magnetically ordered environment. The strong 1D electronic character originates from the Cr-S chains and the combination of weak interlayer hybridization and anisotropy in effective mass and dielectric screening with an effective electron mass ratio of $m^e_X/m^e_Y \sim 50$. This extreme anisotropy experimentally manifests in strong electron-phonon and exciton-phonon interactions, a Peierls-like structural instability and a Fano resonance from a van Hove singularity of similar strength of metallic carbon nanotubes. Moreover, due to the reduced dimensionality and interlayer coupling, CrSBr hosts spectrally narrow (1 meV) excitons of high binding energy and oscillator strength that inherit the 1D character. Overall, CrSBr is best understood as a stack of weakly hybridized monolayers and appears to be an experimentally attractive candidate for the study of exotic exciton and 1D correlated many-body physics in the presence of magnetic order.
description: main: 16 pages, 5 figures; SI: 15 pages, 9 figures
Nonperturbative solution of scalar Yukawa model in two- and three-body Fock space truncations
Creators: name: Karmanov, Vladimir A.
name: Li, Yang
name: Smirnov, Alexander V.
name: Vary, James P.
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The Light-Front Tamm-Dancoff method of finding the nonperturbative solutions in field theory is based on the Fock decomposition of the state vector, complemented with the sector-dependent nonperturbative renormalization scheme. We show in detail how to implement the renormalization procedure and to solve the simplest nontrivial example of the scalar Yukawa model in the two- and three-body Fock space truncations incorporating scalar "nucleon" and one or two scalar "pions".
description: 34 pages, 16 figures, submitted to Phys. Rev. D
An examination of the segmented labour market theory
Creators: name: Mitchell, William F.
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.
Supplementary material from Different types of uncertainty in multisensory perceptual decision making
Creators: name: Aston, Stacey
name: Nardini, Marko
name: Beierholm, Ulrik
Publisher: name: The Royal Society
Year: 2023
Subjects: subject: Neuroscience
classificationCode: 60801
subject: Animal Behaviour

description: Subj Instructions, CTB, VE analysis
Itinerant ferromagnetism in dilute SU(N) Fermi gases
Creators: name: Pera, Jordi
name: Casulleras, Joaquim
name: Boronat, Jordi
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We present exact analytic results for the energy of a SU(N) repulsive Fermi gas as a function of the spin-channel occupation at second order in the gas parameter. This is an extension of an old result that now incorporates the degree of polarization of the system. Therefore, the magnetic properties of the gas can be obtained, free from numerical uncertainties. For spin 1/2 we find that second-order corrections change the itinerant ferromagnetic transition from continuous to first-order. Instead, for spin larger than 1/2 the phase transition is always of first-order type. The transition critical density reduces when the spin increases, making the phase transition more accessible to experiments with ultracold dilute Fermi gases. Estimations for Fermi gases of Yb and Sr with spin 5/2 and 9/2, respectively, are reported.
description: 12 pages, 10 figures. Minor corrections
Food labelling data and reformulation tools
Creators: name: Pravst, Igor
Publisher: name: Zenodo
Year: 2021
Subjects: food labelling
nutrient content
monitoring
reformulation

description: Food labelling is regulated to protect and support consumers’ informed food choices, but food labels also provide useful data for user communities. Cross-sectional monitoring of labelling provides important insights into supply trends and, whilst progress has been made with harmonisation of data collection, only a few countries have extensive monitoring programmes, often due to cost and time implications. The traditional approach is to take photographs of pre-packed foods in key food stores and, using data arising from this image, compile food labelling and composition databases. The approach generates hundreds of thousands of images and involves data extraction and manipulation. Data management and analyses in such studies is complex. Furthermore, such studies need to be repeated every few years. With the growing use of smart phones and associated infrastructure (data roaming, Wi-Fi), crowdsourcing became a realistic alternative for support in compilation of labelling databases. Advantages include reduced costs, speed, flexibility, scalability, and diversity, and participation of citizens, while disadvantages are related with accuracy and duplication.
The policy disputes as to the choice of agricultural technology in China during the 1970's
Creators: name: James, Ian H.
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.
title: Robert Gnehm 1852-1926
title: Erinnerungen an Professor Dr. Phil. und Techn. h.c. Robert Gnehm, Präsident des Schweizerischen Schulrates
titleType: Subtitle
Creators: name: Rohn, Arthur
name: Andreae, C.
name: Bosshard, Emil
name: Ermatinger, Emil
name: Bolliger, Adolf
Publisher: name: [Verlag nicht ermittelbar]
Year: 1926
Subjects: subject: 920 Biografien, Genealogie, Insignien
subject: Nachruf
subject: Gnehm, Robert
subject: Zürich

description: Enthält: Biographische Notizen und verschiedene Ansprachen, gehalten bei der Abdankung ; Predigt von Pfarrer Dr. A. Bolliger anlässlich der Trauerfeier im neuen Krematorium
Quantum electrodynamics of non-demolition detection of single microwave photon by superconducting qubit array
Creators: name: Navez, P.
name: Balanov, A. G.
name: Savel'ev, S. E.
name: Zagoskin, A. M.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: By consistently applying the formalism of quantum electrodynamics we developed a comprehensive theoretical framework describing the interaction of single microwave photons with an array of superconducting transmon qubits in a wave guide cavity resonator. In particular, we analyze the effects of microwave photons on the arrays response to a weak probe signal exciting the resonator. The study reveals that a high quality factor cavities provide better spectral resolution of the response, while cavities with moderate quality factor allow better sensitivity for a single photon detection. Remarkably, our analysis showed that a single-photon signal can be detected by even a sole qubit in cavity under the realistic range of system parameters. We also discuss how quantum properties of the photons and electrodynamical properties of resonators affect the response of qubits array. Our results provide an efficient theoretical background for informing the development and design of quantum devices consisting of arrays of qubits, especially for those using a cavity where an explicit expression for the transmission or reflection is required.
description: 40 pages, 18 figures, 2 tables,
title: The Impossible Knowledge of Excess: An Appraisal of Works by Georges Bataille and Vladimir Nabokov
Creators: name: Ko, Tung-Wei
Publisher: name: University of Kent
Year: 2023

description: The thesis examines Bataille's formulation of heterology and its correlative notions in Nabokov's fictional work. A heterological theory of knowledge, according to Bataille, opposes "any homogeneous representation of the world [...] any philosophical system." In a strict sense, all perceived reality consists in the homogeneous - the term homogeneity, in Bataille's philosophy, signifies "the commensurability of elements and the awareness of this commensurability: human relations are sustained by a reduction to fixed rules based on the consciousness of the possible identity of delineable persons and situations..." Conversely, the heterogeneous concerns elements that are unassimilable not only to the social realm but to any data of sense and thoughts. In theory, the complete renunciation of human consciousness delivers one to the core of the heterogeneous, whose approximate aspects, however, are discernible in the present world. Excess approximates the heterogeneous proper in its implications of non-production and the absence of explanatory matter. The living organism, receiving more energy than is needed for its growth, is naturally susceptible to impulses beyond its capacity and will. Violence, eroticism, an extravagant display of wealth, sacrifice are all manifestations of such expenditure of the surplus energy. Death looms on the horizon, both as a reminder of our material servitude and as the final warning for the inevitable consequence. But it is in death that excess enters into the realm of the heterogeneous proper. All these questions will be explored in the following chapters. The objective is less to arrive at a definitive idea of something so defiant of the dialectical process as excess and the heterogeneous, than to provide a way of thinking wherein the primacy of reason and coherence is, in the interest of going beyond the limits of the homogeneous, openly thwarted. Nabokov's writings are used partly as proving ground of the primary theories and propositions, and partly as one end of an intense conversation with Bataille. On account of their shared propensity for an intellectual pursuit that runs counter to ordinary calculations, Bataille and Nabokov were without question two of the radical chroniclers of the aberrance of human condition. Their attempts to grasp the ungraspable essence of the heterogeneous are further testament to the eternal gulf between representation and reality, to the poverty of language.
Market efficiency and futures prices as predictors of maturity date spot prices
Creators: name: Fisher, W. W. .
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.
A Flexible Bayesian Model for Estimating Subnational Mortality
Creators: name: Alexander, Monica
name: Zagheni, Emilio
name: Barbieri, Magali
Publisher: name: arXiv
Year: 2016
Subjects: subject: Applications (stat.AP)
subject: FOS: Computer and information sciences

description: Reliable mortality estimates at the subnational level are essential in the study of health inequalities within a country. One of the difficulties in producing such estimates is the presence of small populations, where the stochastic variation in death counts is relatively high, and so the underlying mortality levels are unclear. We present a Bayesian hierarchical model to estimate mortality at the subnational level. The model builds on characteristic age patterns in mortality curves, which are constructed using principal components from a set of reference mortality curves. Information on mortality rates are pooled across geographic space and smoothed over time. Testing of the model shows reasonable estimates and uncertainty levels when the model is applied to both simulated data which mimic US counties, and real data for French departments. The estimates produced by the model have direct applications to the study of subregional health patterns and disparities.
Confederated Learning: Federated Learning with Decentralized Edge Servers
Creators: name: Wang, Bin
name: Fang, Jun
name: Li, Hongbin
name: Yuan, Xiaojun
name: Ling, Qing
Publisher: name: arXiv
Year: 2022
Subjects: subject: Machine Learning (cs.LG)
subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: Optimization and Control (math.OC)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: Federated learning (FL) is an emerging machine learning paradigm that allows to accomplish model training without aggregating data at a central server. Most studies on FL consider a centralized framework, in which a single server is endowed with a central authority to coordinate a number of devices to perform model training in an iterative manner. Due to stringent communication and bandwidth constraints, such a centralized framework has limited scalability as the number of devices grows. To address this issue, in this paper, we propose a ConFederated Learning (CFL) framework. The proposed CFL consists of multiple servers, in which each server is connected with an individual set of devices as in the conventional FL framework, and decentralized collaboration is leveraged among servers to make full use of the data dispersed throughout the network. We develop an alternating direction method of multipliers (ADMM) algorithm for CFL. The proposed algorithm employs a random scheduling policy which randomly selects a subset of devices to access their respective servers at each iteration, thus alleviating the need of uploading a huge amount of information from devices to servers. Theoretical analysis is presented to justify the proposed method. Numerical results show that the proposed method can converge to a decent solution significantly faster than gradient-based FL algorithms, thus boasting a substantial advantage in terms of communication efficiency.
description: 13 pages, 5 figures
Flavor- and CP-safe explanation of $g_μ-2$ anomaly
Creators: name: Evans, Jason L.
name: Yanagida, Tsutomu T.
name: Yokozaki, Norimi
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Supersymmetry is still a viable explanation for the muon $g-2$ anomaly, if the sleptons and electroweak gauginos are $\mathcal{O}(100)$ GeV. However, for supersymmetry breaking masses this light, the SUSY flavor and CP-problem are exacerbated. To address this issue, we consider a flavor-safe gauge mediated explanation of the muon $g-2$ with additional Higgs soft supersymmetry breaking mass parameters. The setup provides a generic parameter space within minimal gauge mediation. Furthermore, we show that the problematic CP violating phase can be dynamically suppressed. We find that gauge mediation models have large portions of parameter space where the muon $g-2$ can be explained at 1 $σ$ level. The interplay between the slepton and the CP-odd Higgs masses also makes the majority of this model's parameter space testable at the LHC through searches for sleptons or additional Higgs bosons.
description: 31 pages, 3 figures, version to appear in JHEP
Logistic Models of Fractal Dimension Growth for Spatio-Temporal Dynamics of Urban Morphology
Creators: name: Chen, Yanguang
Publisher: name: arXiv
Year: 2016
Subjects: subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences

description: Urban form and growth can be described with fractal dimension, which is a measurement of space filling of urban evolution. Based on empirical analyses, a discovery is made that the time series of fractal dimension of urban form can be treated as a sigmoid function of time. Among various sigmoid functions, the logistic function is the most probable selection. However, how to use the model of fractal dimension growth to explain and predict urban growth is a pending problem remaining to be solved. This paper is devoted to modeling fractal dimension evolution of different types of cities. A interesting discovery is as follows: for the cities in developed countries such as UK, USA and Israel, the comparable fractal dimension values of a city's morphology in different years can be fitted to the logistic function; while for the cities in developing countries such as China, the fractal dimension data of urban form can be fitted to a quadratic logistic function. A generalized logistic function is thus proposed to model fractal dimension growth of urban form. The logistic model can also be employed to characterize the change of the dimensions of multifractals. The generalized logistic models can be used to predict the missing values of fractal dimension, to estimate the growth rate of the dimension, and thus to reveal the spatio-temporal process and pattern of a city's growth. Especially, the models lay a foundation for researching the correlation between urban form and urbanization and for developing the theory of spatial replacement dynamics.
description: 28 pages, 9 figures, 6 tables
SuperConga: an open-source framework for mesoscopic superconductivity
Creators: name: Holmvall, P.
name: Wennerdal, N. Wall
name: Håkansson, M.
name: Stadler, P.
name: Shevtsov, O.
name: Löfwander, T.
name: Fogelström, M.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We present SuperConga, an open-source framework for simulating equilibrium properties of unconventional and ballistic singlet superconductors, confined to two-dimensional (2D) mesoscopic grains in a perpendicular external magnetic field, at arbitrary low temperature. It aims at being both fast and easy to use, enabling research without access to a computer cluster, and visualization in real-time with OpenGL. The core is written in C++ and CUDA, exploiting the embarrassingly parallel nature of the quasiclassical theory of superconductivity by utilizing the parallel computational power of modern GPUs. The framework self-consistently computes both the superconducting order-parameter and the induced vector potential, and finds the current density, free energy, induced flux density, local density of states, as well as the magnetic moment. A user-friendly Python frontend is provided, enabling simulation parameters to be defined via intuitive configuration files, or via the command-line interface, without requiring a deep understanding of implementation details. For example, complicated geometries can be created with relative ease. The framework ships with simple tools for analyzing and visualizing the results, including an interactive plotter for spectroscopy. An overview of the theory is presented, as well as examples showcasing the framework's capabilities and ease of use. The framework is free to download from https://gitlab.com/superconga/superconga, which also links to the extensive user manual, containing even more examples, tutorials and guides.
description: Accepted version. Review-style article, 31 pages and link to software at https://gitlab.com/superconga/superconga
Temperature structures in Galactic Center clouds - Direct evidence for gas heating via turbulence
Creators: name: Immer, K.
name: Kauffmann, J.
name: Pillai, T.
name: Ginsburg, A.
name: Menten, K. M.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The Central Molecular Zone (CMZ) at the center of our Galaxy is the best template to study star formation processes under extreme conditions, similar to those in high-redshift galaxies. We observed on-the-fly maps of para-H$_{2}$CO transitions at 218 GHz and 291 GHz towards seven Galactic Center clouds. From the temperature-sensitive integrated intensity line ratios of H$_{2}$CO(3$_{2,1}-$2$_{2,0}$)/H$_{2}$CO(3$_{0,3}-$2$_{0,2}$) and H$_{2}$CO(4$_{2,2}-$3$_{2,1}$)/H$_{2}$CO(4$_{0,4}-$3$_{0,3}$) in combination with radiative transfer models, we produce gas temperature maps of our targets. These transitions are sensitive to gas with densities of $\sim$10$^{5}$ cm$^{-3}$ and temperatures <150 K. The measured gas temperatures in our sources are all higher (>40 K) than their dust temperatures ($\sim$25 K). Our targets have a complex velocity structure that requires a careful disentanglement of the different components. We produce temperature maps for each of the velocity components and show that the temperatures of the components differ, revealing temperature gradients in the clouds. Combining the temperature measurements with the integrated intensity line ratio of H$_{2}$CO(4$_{0,4}-$3$_{0,3}$)/H$_{2}$CO(3$_{0,3}-$2$_{0,2}$), we constrain the density of this warm gas to 10$^{4}-$10$^{6}$ cm$^{-3}$. We find a positive correlation of the line width of the main H$_{2}$CO lines with the temperature of the gas, direct evidence for gas heating via turbulence. Our data is consistent with a turbulence heating model with a density of n = 10$^5$ cm$^{-3}$.
description: 11 pages + 43 pages appendix, 4 tables, 35 figures, accepted for publication in A&A
The seven sisters DANCe.II. Proper motions and the lithium-rotation-activity connection for G and K Pleiads
Creators: name: Barrado, D.
name: Bouy, H.
name: Bouvier, J.
name: Moraux, E.
name: Sarro, L. M.
name: Bertin, E.
name: Cuillandre, J. C.
name: Stauffer, J. R.
name: Lillo-Box, J.
name: Pollock, A.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Stellar clusters are open windows to understand stellar evolution. Specifically, the change with time and the dependence on mass of different stellar properties. As such, they are our laboratories where different theories can be tested. We try to understand the origin of the connection between lithium depletion in F, G and K stars, rotation and activity, in particular in the Pleiades open cluster. We have collected all the relevant data in the literature, including information regarding rotation period, binarity and activity, and cross-matched with proper motions, multi-wavelength photometry and membership probability from the DANCe database. In order to avoid biases, only Pleiades single members with probabilities larger than p=0.75 have been included in the discussion. Results. The analysis confirms that there is a strong link between activity, rotation and the lithium equivalent width excess, specially for the range Lum(bol) = 0.5-0.2 Lsun (about K2-K7 spectral types or 0.75-0.95 Msun). It is not possible to disentangle these effects but we cannot exclude that the observed lithium overabundance is partially an observational effect due to enhanced activity, due to a large coverage by stellar spots induced by high rotation rates. Since a bona fide lithium enhancement is present in young, fast rotators, both activity and rotation should play a role in the lithium problem.
description: Accepted Astronomy & Astrophysics, three big tables submitted to CDS
Triadic resonant instability in confined and unconfined axisymmetric geometries
Creators: name: Boury, Samuel
name: Maurer, Paco
name: Joubaud, Sylvain
name: Peacock, Thomas
name: Odier, Philippe
Publisher: name: arXiv
Year: 2022
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: We present an investigation of the resonance conditions of axisymmetric internal wave sub-harmonics in confined and unconfined domains. In both cases, sub-harmonics can be spontaneously generated from a primary wave field if they satisfy at least a resonance condition on their frequencies, of the form $ω_0 = \pm ω_1 \pm ω_2$. We demonstrate that, in an unconfined domain, the sub-harmonics follow three dimensional spatial resonance conditions similar to the ones of Triadic Resonance Instability (TRI) for Cartesian plane waves. In a confined domain, however, the spatial structure of the sub-harmonics is fully determined by the boundary conditions and we observed that these conditions prevail upon the resonance conditions. In both configurations, these findings are supported by experimental data showing good agreement with analytical and numerical derivations.
Probing neutrino nature at Borexino detector with chromium neutrino source
Creators: name: Sobków, W.
name: Błaut, A.
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In this paper, we indicate a possibility of utilizing the intense chromium source ($\sim 370 PBq$) in probing the neutrino nature in low energy neutrino experiments with the ultra-low threshold and background real-time Borexino detector located near the source ($\sim 8 m$). We analyze the elastic scattering of electron neutrinos (Dirac or Majorana, respectively) on the unpolarized electrons in the relativistic neutrino limit. We assume that the incoming neutrino beam is the superposition of left-right chiral states. Left chiral neutrinos may be detected by the standard $V A$ and non-standard scalar $S_L$, tensor $T_L$ interactions, while right chiral ones partake only in the exotic $V + A$ and $S_R, T_R$ interactions. Our model-independent study is carried out for the flavour (current) neutrino eigenstates. We compute the expected event number for the standard $V-A$ interaction of the left chiral neutrinos using the current experimental values of standard couplings and in the case of left-right chiral superposition. We show that the significant decrement in the event number due to the interference terms between the standard and exotic interactions for the Majorana $ν_e$'s may appear. The $90 \%$ C. L. sensitivity contours in the planes of corresponding exotic couplings are also found. The presence of interferences in the Majorana case gives the stronger constraints than for the Dirac neutrinos, even if the neutrino source is placed outside the detector.
description: 8 pages, 7 eps figures
The role of CRKL in Breast Cancer Metastasis: Insights from Systems Biology
Creators: name: Chafik, Abderrahim
Publisher: name: arXiv
Year: 2016
Subjects: subject: Molecular Networks (q-bio.MN)
subject: FOS: Biological sciences

description: MicroRNAs (miRNAs) are small non-coding RNAs that regulate gene expression post-transcriptionally. They are involved in key biological processes and then may play a major role in the development of human diseases including cancer, in particular their involvement in breast cancer metastasis has been confirmed. Recently, the authors of ref.(\cite{key1} have found that miR-429 may have a role in the inhibition of breast cancer metastasis and have identified its target gene CRKL as a potential candidate. In this paper, by using systems biology tools we have shown that CRKL is involved in positive regulation of ERK1/2 signaling pathway and contribute to the regulation of LYN through a topological generalization of feed forward loop.
description: 10 pages, 2 figures
Virtual excitations and quantum correlations in ultra-strongly coupled harmonic oscillators under intrinsic decoherence
Creators: name: Hab-arrih, Radouan
name: Jellal, Ahmed
name: Kinani, El Hassan El
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study the intrinsic decoherence of coupled harmonic oscillators. The Milburn master equation is solved exactly, and the dynamics of virtual ground state excitations are investigated. The interaction of quantum correlations and virtual excitation was then studied. The following is a summary of our major findings. (i) The damped oscillatory profile of all three quantities is the same. (ii) Ultra-strong coupling combined with huge anisotropy values results in the reemergence of entanglement and steering. (iii) To sustain entanglement and steering, virtual excitations are required. (iv) The quantum correlations are amplified in the quantum synchronous regime. (v) Ultra-strong couplings cause inherent decoherence to be avoided.
description: 11 pages, 4 figures
Evolution of clusters in energetic heavy ion bombarded amorphous graphite-III: Photo-emission and velocity analysis of sputtered carbon clusters
Creators: name: Qayyum, A.
name: Akhtar, M. N.
name: Riffat, T.
name: Ahmad, Shoaib
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Diagnostics of the carbon atoms, ions, and clusters sputtered from a graphite surface under 10 keV Xe ion bombardments reveals the presence of neutral carbon clusters and positively charged species in the photo-emission spectra. The observed absence of the positively charged clusters in the mass spectra by a velocity analyzer is supplemented by the presence of the negatively charged monatomic, diatomic, triatomic and quatratomic clusters.. The velocity spectra are dominated by the negative C1, C2, C3 and C4. The latter two are observed having much reduced peak intensities . These results may help us to understand the contribution of neutral and charged species in the heavy-ion sputtering of graphite and the energetics of soot formation. Xe is chosen being the heaviest noble gas ion irradiating at not too high energy i.e 10 keV.
description: 6 pages, 4 figures
Measuring abnormal security price performance
Creators: name: Shevlin, Terrence 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.
Precision requirements and innovative manufacturing for ultrahigh precision laser interferometry of gravitational-wave astronomy
Creators: name: Ni, Wei-Tou
name: Han, Sen
name: Jin, Tao
Publisher: name: arXiv
Year: 2016
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: With the LIGO announcement of the first direct detection of gravitational waves (GWs), the GW Astronomy was formally ushered into our age. After one-hundred years of theoretical investigation and fifty years of experimental endeavor, this is a historical landmark not just for physics and astronomy, but also for industry and manufacturing. The challenge and opportunity for industry is precision and innovative manufacturing in large size - production of large and homogeneous optical components, optical diagnosis of large components, high reflectance dielectric coating on large mirrors, manufacturing of components for ultrahigh vacuum of large volume, manufacturing of high attenuating vibration isolation system, production of high-power high-stability single-frequency lasers, production of high-resolution positioning systems etc. In this talk, we address the requirements and methods to satisfy these requirements. Optical diagnosis of large optical components requires large phase-shifting interferometer; the 1.06 μm Phase Shifting Interferometer for testing LIGO optics is an example. High quality mirrors are crucial for laser interferometric GW detection, so as for ring laser gyroscope, high precision laser stabilization via optical cavities, quantum optomechanics, cavity quantum electrodynamics and vacuum birefringence measurement. There are stringent requirements on the substrate materials and coating methods. For cryogenic GW interferometer, appropriate coating on sapphire or silicon are required for good thermal and homogeneity properties. Large ultrahigh vacuum components and high attenuating vibration system together with an efficient metrology system are required and will be addressed. For space interferometry, drag-free technology is well-developed; weak-light phase locking is demonstrated in the laboratories while weak-light manipulation technology still needs developments.
description: 12 pages, 3 tables, invited talk for Photonics Asia 2016, October 12-14, Beijing. To be published in Proceedings of SPIE
Equilibria and energy minimizers for an interaction model on the hyperbolic space
Creators: name: Fetecau, Razvan C.
name: Park, Hansol
Publisher: name: arXiv
Year: 2022
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: We study an intrinsic model for collective behaviour on the hyperbolic space $\bbh^\dm$. We investigate the equilibria of the aggregation equation (or equivalently, the critical points of the associated interaction energy) for interaction potentials that include Newtonian repulsion. By using the method of moving planes, we establish the radial symmetry and the monotonicity of equilibria supported on geodesic balls of $\bbh^\dm$. We find several explicit forms of equilibria and show that one such equilibrium is a global energy minimizer. We also consider more general potentials and utilize a technique used for $\bbr^\dm$ to establish the existence of compactly supported global minimizers. Numerical simulations are presented, suggesting that some of the equilibria studied here are global attractors. The key tool in our investigations is a family of isometries of $\bbh^\dm$ that we have developed for this purpose.
Convolutional Oriented Boundaries
Creators: name: Maninis, Kevis-Kokitsi
name: Pont-Tuset, Jordi
name: Arbeláez, Pablo
name: Van Gool, Luc
Publisher: name: arXiv
Year: 2016
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: We present Convolutional Oriented Boundaries (COB), which produces multiscale oriented contours and region hierarchies starting from generic image classification Convolutional Neural Networks (CNNs). COB is computationally efficient, because it requires a single CNN forward pass for contour detection and it uses a novel sparse boundary representation for hierarchical segmentation; it gives a significant leap in performance over the state-of-the-art, and it generalizes very well to unseen categories and datasets. Particularly, we show that learning to estimate not only contour strength but also orientation provides more accurate results. We perform extensive experiments on BSDS, PASCAL Context, PASCAL Segmentation, and MS-COCO, showing that COB provides state-of-the-art contours, region hierarchies, and object proposals in all datasets.
description: ECCV 2016 Camera Ready
Ferromagnetism beyond Lieb's theorem
Creators: name: Costa, Natanael C.
name: Mendes-Santos, Tiago
name: Paiva, Thereza
name: Santos, Raimundo R. dos
name: Scalettar, Richard T.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The noninteracting electronic structures of tight binding models on bipartite lattices with unequal numbers of sites in the two sublattices have a number of unique features, including the presence of spatially localized eigenstates and flat bands. When a \emph{uniform} on-site Hubbard interaction $U$ is turned on, Lieb proved rigorously that at half filling ($ρ=1$) the ground state has a non-zero spin. In this paper we consider a `CuO$_2$ lattice (also known as `Lieb lattice', or as a decorated square lattice), in which `$d$-orbitals' occupy the vertices of the squares, while `$p$-orbitals' lie halfway between two $d$-orbitals. We use exact Determinant Quantum Monte Carlo (DQMC) simulations to quantify the nature of magnetic order through the behavior of correlation functions and sublattice magnetizations in the different orbitals as a function of $U$ and temperature. We study both the homogeneous (H) case, $U_d= U_p$, originally considered by Lieb, and the inhomogeneous (IH) case, $U_d\neq U_p$. For the H case at half filling, we found that the global magnetization rises sharply at weak coupling, and then stabilizes towards the strong-coupling (Heisenberg) value, as a result of the interplay between the ferromagnetism of like sites and the antiferromagnetism between unlike sites; we verified that the system is an insulator for all $U$. For the IH system at half filling, we argue that the case $U_p\neq U_d$ falls under Lieb's theorem, provided they are positive definite, so we used DQMC to probe the cases $U_p=0,U_d=U$ and $U_p=U, U_d=0$. We found that the different environments of $d$ and $p$ sites lead to a ferromagnetic insulator when $U_d=0$; by contrast, $U_p=0$ leads to to a metal without any magnetic ordering. In addition, we have also established that at density $ρ=1/3$, strong antiferromagnetic correlations set in, caused by the presence of one fermion on each $d$ site.
description: 10 pages, 14 figures
Evolution of clusters in energetic heavy ion bombarded amorphous graphite-III: Energy spectra of charged clusters recoiling from Xe+ irradiations
Creators: name: Ahmad, Bashir
name: Ahmad, Maqsood
name: Ahmad, Shoaib
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We report on a novel technique of heavy ion induced surface modification and clustering mechanisms in amorphous graphite using Direct Recoil Spectrometry. The charged clusters emanating as Direct Recoils from 50-150 keV Xe+ irradiated graphite surface are detected in successive energy spectra at large recoil angles. Ion beams irradiated surface is shown to provide an environment of sputtered carbon atoms and clusters. The clustering occurs on the surface where the most stable ones accumulate. The spectra have identified clustering mechanisms operating in amorphous graphite under high fluence irradiations at grazing incidence that are related to the reconstructed surface features. Heavy ion irradiation induces the twin effects of producing a wide range of clusters and simultaneously ejecting these as DRs.
description: 13 pages, 5 figures