cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
title: Stratigraphic reconstructions of bulk volatile chemistry from fluid inclusions in stratigraphic drillhole 99VRNTGSDD1, Birrindudu Basin
Creators: name: C., Carson
name: S., Cowan
name: C., Boreham
name: J., Chao
name: W., Phiukhao
name: D., Hall
name: A., Bailey
name: C., Carson
Publisher: name: Commonwealth of Australia (Geoscience Australia)
Year: 2023
Subjects: subject: GEOLOGY
subject: Basin Analysis
subject: EARTH SCIENCES
subject: EFTF Exploring for the Future
subject: Officer-Musgrave-Birrindudu module
subject: Fluid Inclusions
subject: Volatile chemistry
subject: Birrindudu Basin
subject: Proterozoic
subject: 99VRNTGSDD1 stratigraphic drillhole
subject: Published_External

description: Geoscience Australia’s Exploring for the Future program provides precompetitive information to inform decision-making by government, community and industry on the sustainable development of Australia's mineral, energy and groundwater resources. By gathering, analysing and interpreting new and existing precompetitive geoscience data and knowledge, we are building a national picture of Australia’s geology and resource potential.

The Paleo to Mesoproterozoic Birrindudu Basin is an underexplored frontier basin located in northwestern Northern Territory and northeastern Western Australia. The Birrindudu Basin is a region of focus for the second phase of the EFTF program (2020–2024) as it contains strata of similar age to the prospective McArthur Basin, South Nicholson region and Mount Isa Province, but remains comparatively poorly understood.

Geoscience Australia have undertaken (via the service provider, FIT, Schlumberger) stratigraphic reconstructions of bulk volatile chemistry from fluid inclusions from the NTGS stratigraphic drillhole 99VRNTGSDD1, Birrindudu Basin, located in the northwest Northern Territory.

This ecat record releases the final report containing the results of fluid inclusion stratigraphy, thin section and microthermometry analyses, raw data files (*.LAS) and rock descriptions by FIT Schlumberger. Company reference number FI230005c.
Scott correction for large atoms and molecules in a self-generated magnetic field
Creators: name: Erdos, Laszlo
name: Fournais, Soren
name: Solovej, Jan Philip
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences
subject: 35P15, 81Q10, 81Q20

description: We consider a large neutral molecule with total nuclear charge $Z$ in non-relativistic quantum mechanics with a self-generated classical electromagnetic field. To ensure stability, we assume that $Z\al^2\le κ_0$ for a sufficiently small $κ_0$, where $\al$ denotes the fine structure constant. We show that, in the simultaneous limit $Z\to\infty$, $\al\to 0$ such that $κ=Z\al^2$ is fixed, the ground state energy of the system is given by a two term expansion $c_1Z^{7/3} + c_2(κ) Z^2 + o(Z^2)$. The leading term is given by the non-magnetic Thomas-Fermi theory. Our result shows that the magnetic field affects only the second (so-called Scott) term in the expansion.
An NF-kappa B-like element plays an essential role in interleukin-1-mediated costimulation of the mouse interleukin-2 promoter
Creators: name: Stricker, K.
name: Serfling, E.
name: Krammer, P. H.
name: Falk, Werner
Publisher: name: Universität Regensburg
Year: 1993
Subjects: subject: 610 Medizin
subject: Animals
subject: Base Sequence
subject: Binding Sites
subject: Consensus Sequence
subject: DNA-Binding Proteins/physiology
subject: Gene Expression Regulation
subject: Interleukin-1/physiology
subject: Interleukin-2/genetics
subject: Mice
subject: Molecular Sequence Data
subject: NF-kappa B/physiology
subject: Nuclear Proteins/physiology
subject: Promoter Regions, Genetic
subject: T-Lymphocytes/physiology
subject: Transcription Factors/physiology
subject: Tumor Cells, Cultured

description: Interleukin-1 (IL-1) costimulation is required for efficient IL-2 synthesis and IL-2 receptor (IL-2R) expression of T cells. The molecular events leading to these effects are largely unknown. We utilized an IL-1-responsive and an IL-1-non-responsive subclone of the mouse thymoma cell line EL4 to investigate how IL-1 activates IL-2 gene expression. We correlated IL-2 promoter activity with the activity of the endogenous IL-2 gene, thereby showing the biological significance of our results. Our experiments provide new functional data showing that a major target of IL-1 mediated costimulation is the chi B-like site, T cell element distal TCEd (GGGATTTCAC), of the IL-2 promoter. Thus, deletion or mutation of TCEd within a complete IL-2 promoter abrogated IL-1 costimulation in the IL-1 responsive EL4 subclone. Therefore, the TCEd element is functionally essential for the effect of IL-1. We also identified a nuclear factor (NF), IL-1 NF, that binds to the TCEd site after IL-1 stimulation. This factor was only present in the IL-1-responsive EL4 subclone and not in the IL-1-non-responsive subclone after IL-1 stimulation and did not appear after phytohemagglutinin (PHA)-treatment. Binding of IL-1 NF to the TCEd site was competed by a typical chi B oligonucleotide, suggesting that it is similar to NF-chi B in its DNA-binding properties. However, the TCEd element was only activated by costimulation with PHA and IL-1 whereas a typical chi B element was already activated by IL-1 alone. These data suggest that the biological function of the TCEd element of the IL-2 promoter differs from that of a canonical chi B element. Our data provide new evidence that IL-1 acts on the IL-2 promoter by activating the TCEd element via the transcription factor IL-1 NF. Furthermore, activation of this element requires two signals, delivered by IL-1 and PHA, in this way reflecting the activation requirement for the endogenous IL-2 gene.
Dynamics of nodal points and the nodal count on a family of quantum graphs
Creators: name: Band, Ram
name: Berkolaiko, Gregory
name: Smilansky, Uzy
Publisher: name: arXiv
Year: 2010
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences
subject: 34B45, 35Q40

description: We investigate the properties of the zeros of the eigenfunctions on quantum graphs (metric graphs with a Schrödinger-type differential operator). Using tools such as scattering approach and eigenvalue interlacing inequalities we derive several formulas relating the number of the zeros of the n-th eigenfunction to the spectrum of the graph and of some of its subgraphs. In a special case of the so-called dihedral graph we prove an explicit formula that only uses the lengths of the edges, entirely bypassing the information about the graph's eigenvalues. The results are explained from the point of view of the dynamics of zeros of the solutions to the scattering problem.
description: 34 pages, 12 figures
Optimization of the time-dependent traveling salesman problem with Monte Carlo methods
Creators: name: Bentner, Johannes
name: Bauer, Günter
name: Obermair, Gustav M.
name: Morgenstern, Ingo
name: Schneider, Johannes
Publisher: name: Universität Regensburg
Year: 2001
Subjects: subject: 530 Physik
subject: 02.70.Uu, 05.10.Ln, 02.50.Ng, 02.50.Ga

description: A problem often considered in operations research and computational physics is the traveling salesman problem, in which a traveling salesperson has to find the shortest closed tour between a certain set of cities. This problem has been extended to more realistic scenarios, e.g., the “real” traveling salesperson has to take rush hours into consideration. We will show how this extended problem is treated with physical optimization algorithms. We will present results for a specific instance of Reinelt’s library TSPLIB95, in which we define a zone with traffic jams in the afternoon.
Hadronic jet models today
Creators: name: Sikora, Marek
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The matter content of relativistic jets in AGNs is dominated by a mixture of protons, electrons, and positrons. During dissipative events these particles tap a significant portion of the internal and/or kinetic energy of the jet and convert it into electromagnetic radiation. While leptons - even those with only mildly relativistic energies - can radiate efficiently, protons need to be accelerated up to energies exceeding $10^{16-19}$ eV to dissipate radiatively a significant amount of energy via either trigerring pair cascades or direct synchrotron emission. Here I review various constraints imposed on the role of hadronic non-adiabatic cooling processes in shaping the high energy spectra of blazars. It will be argued that protons, despite being efficiently accelerated and presumably playing a crucial role in jet dynamics and dissipation of the jet kinetic energy to the internal energy of electrons and positrons, are more likely to remain radiatively passive in AGN jets.
description: 9 pages; in Proceedings of IAU Symposium 275, "Jets at all Scales", Buenos Aires, Argentina, 13-17 September 2010, eds. G.E. Romero, R.A. Sunyaev, and T. Belloni
Discussion of: A statistical analysis of multiple temperature proxies: Are reconstructions of surface temperatures over the last 1000 years reliable?
Creators: name: Rougier, Jonathan
Publisher: name: arXiv
Year: 2011
Subjects: subject: Applications (stat.AP)
subject: FOS: Computer and information sciences

description: Discussion of "A statistical analysis of multiple temperature proxies: Are reconstructions of surface temperatures over the last 1000 years reliable?" by B.B. McShane and A.J. Wyner [arXiv:1104.4002]
description: Published in at http://dx.doi.org/10.1214/10-AOAS409 the Annals of Applied Statistics (http://www.imstat.org/aoas/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Neural networks and chip design
Creators: name: Morgenstern, Ingo
Publisher: name: Universität Regensburg
Year: 1987
Subjects: subject: 530 Physik

description: I present an abstraction of the Hopfield-model for neural networks which is suitable for physical chip design using commerically available two-dimensional gate arrays. It can be shown that ±1-bonds combined with a dilution of about 80–90% of the original Hopfield-connections still lead to a comparable performance of the network. Furthermore the learning capability of the chips is discussed. Future extensions concerning programmable designs are outlined. The impact on aspects of brain research is discussed.
Anisotropic excitonic effects in the energy loss function of hexagonal boron nitride
Creators: name: Galambosi, S.
name: Wirtz, L.
name: Soininen, J. A.
name: Serrano, J.
name: Marini, A.
name: Watanabe, K.
name: Taniguchi, T.
name: Huotari, S.
name: Rubio, A.
name: Hämäläinen, K.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We demonstrate that the valence energy-loss function of hexagonal boron nitride (hBN) displays a strong anisotropy in shape, excitation energy and dispersion for momentum transfer q parallel or perpendicular to the hBN layers. This is manifested by e.g. an energy shift of 0.7 eV that cannot be captured by single-particle approaches and is a demonstration of a strong anisotropy in the two-body electron-hole interaction. Furthermore, for in-plane directions of q we observe a splitting of the -plasmon in the M direction that is absent in the K direction and this can be traced back to band-structure effects.
description: 10 pages, 4 figures
The 2010 nova outburst of the symbiotic Mira V407 Cyg
Creators: name: Munari, U.
name: Joshi, V. H.
name: Ashok, N. M.
name: Banerjee, D. P. K.
name: Valisa, P.
name: Milani, A.
name: Siviero, A.
name: Dallaporta, S.
name: Castellani, F.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The nova outburst experienced in 2010 by the symbiotic binary Mira V407 Cyg has been extensively studied at optical and infrared wavelengths with both photometric and spectroscopic observations. This outburst, reminiscent of similar events displayed by RS Oph, can be described as a very fast He/N nova erupting while being deeply embedded in the dense wind of its cool giant companion. The hard radiation from the initial thermonuclear flash ionizes and excites the wind of the Mira over great distances (recombination is observed on a time scale of 4 days). The nova ejecta is found to progressively decelerate with time as it expands into the Mira wind. This is deduced from line widths which change from a FWHM of 2760 km/s on day +2.3 to 200 km/s on day +196. The wind of the Mira is massive and extended enough for an outer neutral and unperturbed region to survive at all outburst phases.
description: MNRAS Letter, in press
Characterization of Glucocorticoid Binding Capacity in Human Mononuclear Lymphocytes: Increase by Metyrapone is Prevented by Dexamethasone Pretreatment
Creators: name: Rupprecht, R.
name: Kornhuber, J.
name: Wodarz, Norbert
name: Göbel, C.
name: Lugauer, J.
name: Sinzger, C.
name: Beckmann, H.
name: Riederer, P.
name: Möller, O. A.
Publisher: name: Universität Regensburg
Year: 1990
Subjects: subject: 610 Medizin

description: Autoregulation of receptor systems by their own ligands is a well established biological phenomenon. While down-regulation of the glucocorticoid binding capacity by glucocorticoids has been shown in animals and humans, data on up-regulation processes in humans are lacking. To further explore glucocorticoid receptor plasticity in relation to endogenous ligands, glucocorticoid binding parameters were assessed in 15 healthy controls before and after oral administration of 1.5 g metyrapone with and without dexamethasone pretreatment. Administration of metyrapone resulted in blockade of the feedback of the hypothalamic-pituitary-adrenal system as shown by the rise in adrenocorticotropin levels, while pretreatment with 1 mg dexamethasone completely suppressed adrenocorticotropin concentrations. Glucocorticoid binding sites per lymphocyte exhibited an increase of 63% following metyrapone administration, which was prevented by dexamethasone pretreatment. Comparison of morning and afternoon glucocorticoid binding sites per cell in 11 healthy volunteers further revealed a diurnal rhythm of glucocorticoid receptor sites. These data suggest that human lymphocyte glucocorticoid receptors are under autoregulatory control.
title: The American Diner Waitress: An autoethnographic study of the icon
Creators: name: Hasbrouck, Heidi Liane
Publisher: name: Goldsmiths, University of London
Year: 2018

description: This practice-based thesis explores the relationship between the iconography of the American diner waitress and the labour of diner waitresses. My research is grounded in ethnographic fieldwork, whereby I worked as a diner waitress and conducted in-depth interviews with my co-workers in New Jersey. I use autoethnography and experimental documentary filmmaking as methodological tools to (re)produce both the iconography and the labour of the American diner waitress. Through this I reveal the feedback loop that exists between the iconography and narrative associated with the affective labour of waitressing. As a feminist artist, activist and cultural theorist, I affect the icon through exposing its power to find potential points of intervention that could improve waitresses’ labour conditions.

I ground my ethnographic fieldwork and practice in a historiography of American waitressing and feminine labour. I analyse the extraction of the icon and what the image is, to understand the relationship between the icon and waitresses’ labour. To do this I draw from feminist theory including: feminist Marxism, affect theory, cultural theory, and feminist historiography. I also utilize semiotic analysis as a tool for further unpacking the image and narrative. My methodology chapter provides the context of my practice and how it intersects and informs my theoretical output. I look to autoethnography, affective immersion, and documentary film practice to do this. All of this sets the context for my film, Diner Wars, and the final two chapters, where I present my autoethnographic experiences as a diner waitress. I ask: how do the material conditions I experienced in my fieldwork, such as tipping and managerial control, relate to the iconography of diner waitressing? How do waitresses engender ideas of femininity such as sacrifice and ‘cattiness’ and how does this play out in our performance as waitresses and our (re)production of the icon?
Cryohydrogeology of a covered waste rock pile in a permafrost environment : large scale field experiment and freeze-thaw numerical investigations
Creators: name: Collette, Laurier
Publisher: name: University of British Columbia
Year: 2017

description: In order to prevent acid mine drainage, a number of cover concepts are used to limit rainwater infiltration through waste rock. A large scale covered waste rock test pile (120x80x14m high) was constructed and instrumented in 2006 at the Diavik Diamond Mine in the Northwest Territories, Canada, in a region of continuous permafrost. The thermal cover of the pile consists of a 1.5-m thick loose till layer capped with 3 m of non-acid generating waste rock. The thermo-hydrologic behaviour of the core and the cover was assessed through the integration of meteorological, moisture content (from TDR and ECH2O probes), thermistor and outflow data collected over a 10-year period. Heating cables located at the base of the pile significantly affected the thermal regime before they were turned off in 2011. The results considered over the 10 year monitoring period show that the cover provides insulation and promotes the onset of a frozen barrier to moisture flow at the base of the active layer, between 2.5 and 3.5 m depth. At some locations below the crest and within the batters, data show evidence of moisture build-up over time on top of the frozen zone. One-dimensional freeze-thaw numerical simulations of coupled heat transfer and moisture flow were carried out, using SoilVision SVFlux and SVHeat packages. The results indicate that the active layer is contained within the upper waste rock layer, where moisture builds up over time. Air temperature and material thermal properties are the key factors controlling the cover behaviour. The initial moisture conditions and hydraulic properties of the cover materials are important in the prediction of ice and moisture content within the till. Simulations show drainage of moisture from the till to the waste rock in the early stage of the pile, suggesting that the till layer in the test pile may not be functioning as a high moisture and latent heat layer. A long term simulation suggests that evaporation, precipitation, moisture content and the active layer thickness eventually reach a dynamic equilibrium after over 30 years if air temperature increase is neglected.
The presentation of SARS-CoV-2 peptides by the common HLA-A∗02:01 molecule
Creators: name: Szeto, Christopher
name: Chatzileontiadou, Dimitra
name: Nguyen, Andrea
name: Sloane, Hannah
name: Lobos, Christian A
name: Jayasinghe, Dhilshan
name: Halim, H
name: Smith, C
name: Riboldi-Tunnicliffe, A
name: Grant, Emma
name: Gras, Stephanie
Publisher: name: La Trobe
Year: 2023
Subjects: classificationCode: 3204
subject: Immunology
subject: FOS: Clinical medicine

description: © 2021 The Authors Immunology; structural biology; virology
The presentation of SARS-CoV-2 peptides by the common HLA-A∗02:01 molecule
Creators: name: Szeto, Christopher
name: Chatzileontiadou, Demetra SM
name: Nguyen, Andrea T
name: Sloane, Hannah
name: Lobos, Christian A
name: Dhilshan Jayasinghe
name: H Halim
name: C Smith
name: A Riboldi-Tunnicliffe
name: Grant, Emma J
name: Gras, Stephanie
Publisher: name: La Trobe
Year: 2021
Subjects: Uncategorized

description: © 2021 The Authors Immunology; structural biology; virology
A finitely presented orderable group with insoluble word problem
Creators: name: Bludov, V. V.
name: Glass, A. M. W.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Group Theory (math.GR)
subject: FOS: Mathematics

description: We construct a finitely presented (two-sided) totally orderable group with insoluble word problem.
description: 17 pages
The targum (1878:June)
Creators: name: No Name Supplied
Publisher: name: Targum Association
Year: 1878

description: Some University historians indicate that the Targum was first published as an annual in 1867, but of this we have no extant evidence. In January 1869, the Targum as we now know it, made its appearance as a monthly paper that concerned itself with student “literary contributions” and college news as well as serving as a vehicle for bringing news to alumni and the general public. The newspaper, which originally was for sale, varied in frequency over the years as did its title (The Targum, Rutgers Targum, Rutgers Daily Targum, and Daily Targum). The newspaper has continuously been published since 1869 with the exception of 19 months during the second world war, between February 1944 and October 1945. The Targum was published by the students of Rutgers College, and later Rutgers University—New Brunswick represented through the years as the Targum Association, Rutgers Targum Association, and Rutgers College Targum. As a student organization, the Targum operated under the oversight of the dean of students and student government but in October 1980, the Targum became an independent college paper.
The targum (1877:Nov.)
Creators: name: No Name Supplied
Publisher: name: Targum Association
Year: 1877

description: Some University historians indicate that the Targum was first published as an annual in 1867, but of this we have no extant evidence. In January 1869, the Targum as we now know it, made its appearance as a monthly paper that concerned itself with student “literary contributions” and college news as well as serving as a vehicle for bringing news to alumni and the general public. The newspaper, which originally was for sale, varied in frequency over the years as did its title (The Targum, Rutgers Targum, Rutgers Daily Targum, and Daily Targum). The newspaper has continuously been published since 1869 with the exception of 19 months during the second world war, between February 1944 and October 1945. The Targum was published by the students of Rutgers College, and later Rutgers University—New Brunswick represented through the years as the Targum Association, Rutgers Targum Association, and Rutgers College Targum. As a student organization, the Targum operated under the oversight of the dean of students and student government but in October 1980, the Targum became an independent college paper.
Parallelization of the exact diagonalization of the t−t′-Hubbard model
Creators: name: Fettes, Werner
name: Morgenstern, Ingo
name: Husslein, Thomas
Publisher: name: Universität Regensburg
Year: 1997
Subjects: subject: 530 Physik
subject: 74.20

description: We present a new parallel algorithm for the exact diagonalization of the t−t′-Hubbard model with the Lanczos method. By invoking a new scheme of labeling the states we were able to obtain a speedup of up to four on 16 nodes of an IBM SP2 for the calculation of the ground state energy and an almost linear speedup for the calculation of the correlation functions. Using this algorithm we performed an extensive study of the influence of the next-nearest hopping parameter t′ in the t−t′-Hubbard model on ground state energy and the superconducting correlation functions for both attractive and repulsive interaction.
Efficient parallelization of the 2D Swendsen-Wang algorithm
Creators: name: Hackl, R.
name: Matuttis, H. G.
name: Singer, Johannes Maria
name: Husslein, Thomas
name: Morgenstern, Ingo
Publisher: name: Universität Regensburg
Year: 1994
Subjects: subject: 530 Physik

description: We established a fast Swendsen-Wang algorithm for the two-dimensional Ising model on parallel computers with a high efficiency. On an Intel paragon with 140 processors we reached spin update times of only 14 ns with an efficiency of 89%. This algorithm was used to examine the non-equilibrium relaxation of magnetization and energy in large Ising systems of a size up to 17920 × 17920 spins. Nevertheless we observed still a strong finite-size effect for the magnetization. We assume both magnetization and energy decay to behave like (t + Δ)-λe-bt in an infinitely large system. Thus, for long times magnetization and energy show an exponential, asymtotic time-dependence, implying a critical dynamic exponent z of zero.
Monte Carlo procedure for 2-dimensional fermion systems
Creators: name: Morgenstern, Ingo
name: Würtz, D.
Publisher: name: Universität Regensburg
Year: 1985
Subjects: subject: 530 Physik

description: In this preliminary report we present a disconnected bond decomposition for 2-dimensional fermion systems following the Trotter-Suzuki-transformation. The decomposition does not lead to negative transition probabilities. Furthermore a local algorithm is shown for the reorientation of the lattice suitable for Monte Carlo simulations.
Explanation of the freezing temperature in spin glasses
Creators: name: Morgenstern, Ingo
Publisher: name: Universität Regensburg
Year: 1982
Subjects: subject: spin glass state, ising model, magnetic−phase transformations, melting points, antiferromagnetism, ferromagnetism, monte carlo method, ground states, entropy, transfer matrix method, free energy
subject: 530 Physik
subject: 75.10.-b; 75.50.Kj; 75.30.-m

description: The freezing of spins in the two‐dimensional ±J‐model [1,2] (anti‐ and ferromagnetic nearest neighbour bonds between Ising spins) is investigated for the case of a one‐spin‐flip‐dynamic (as used in Monte‐Carlo calculations). The phenomenon is caused by the existence of finite energy barriers between the different ground‐state valleys. The barrier heights are calculated by a numerical method turning one ground state to its inverse. The freezing temperature is determined by the vanishing of the free energy barriers between the valleys. The corresponding entropy is calculated by the Transfermatrix‐Method. The free energy barriers vanish at Tf≂1.3±0.1 in good agreement with the cusp of the susceptibility in Monte‐Carlo calculations. The long‐time behaviour of spin glasses is governed by the mentioned free energy barriers.
Discussion of: A statistical analysis of multiple temperature proxies: Are reconstructions of surface temperatures over the last 1000 years reliable?
Creators: name: McIntyre, Stephen
name: McKitrick, Ross
Publisher: name: arXiv
Year: 2011
Subjects: subject: Applications (stat.AP)
subject: Atmospheric and Oceanic Physics (physics.ao-ph)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: Discussion of "A statistical analysis of multiple temperature proxies: Are reconstructions of surface temperatures over the last 1000 years reliable?" by B.B. McShane and A.J. Wyner [arXiv:1104.4002]
description: Published in at http://dx.doi.org/10.1214/10-AOAS398L the Annals of Applied Statistics (http://www.imstat.org/aoas/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Numerical simulation of the single-band Hubbard model
Creators: name: Morgenstern, Ingo
Publisher: name: Universität Regensburg
Year: 1988
Subjects: subject: 530 Physik

description: Monte Carlo simulations based on the Trotter-Suzuki transformation were carried out using 6×6 and 12×12 lattices and the single-band Hubbard model with intermediaterange repulsive interaction. The absence of the ldquominus-sign problemrdquo for sufficiently low temperatures and appropriate doping indicates bosonic behavior reminiscent of superconductivity. It was found that holes prefer to pair on next-nearest-neighbor sites while nearest neighbors are suppressed.
Genomic Characterisation of a Novel Avipoxvirus Isolated from an Endangered Northern Royal Albatross (Diomedea sanfordi)
Creators: name: Sarker, Subir
name: Athukorala, Ajani
name: Nyandowe, Tadiwa
name: Bowden, Timothy R
name: Boyle, David B
Publisher: name: La Trobe
Year: 2023
Subjects: classificationCode: 3105
subject: Genetics
subject: FOS: Biological sciences
classificationCode: 3107
subject: Microbiology

description: Marine bird populations have been declining globally with the factors driving this decline not fully understood. Viral diseases, including those caused by poxviruses, are a concern for endangered seabird species. In this study we have characterised a novel avipoxvirus, tentatively designated albatrosspox virus (ALPV), isolated from a skin lesion of an endangered New Zealand northern royal albatross (Diomedea sanfordi). The ALPV genome was 351.9 kbp in length and contained 336 predicted genes, seven of which were determined to be unique. The highest number of genes (313) in the ALPV genome were homologs of those in shearwaterpox virus 2 (SWPV2), while a further 10 were homologs to canarypox virus (CNPV) and an additional six to shearwaterpox virus 1 (SWPV1). Phylogenetic analyses positioned the ALPV genome within a distinct subclade comprising recently isolated avipoxvirus genome sequences from shearwater, penguin and passerine bird species. This is the first reported genome sequence of ALPV from a northern royal albatross and will help to track the evolution of avipoxvirus infections in this endangered species.
Rescaled potential for transition metal solutes in a-iron
Creators: name: Hepburn, D. J.
name: Ackland, G. J.
name: Olsson, P.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We present empirical potentials for dilute transition metal solutes in a-iron. It is in the Finnis-Sinclair form and is therefore suitable for billion atom molecular dynamics simulations. First principles calculation shows that there are clear trends across the transition metal series which enable us to relate the rescaling parameters to principal quantum number and number of d electrons. The potential has been developed using a rescaling technique to provide solute-iron and solute-solute interactions from an existing iron potential.
Genomic Characterisation of a Novel Avipoxvirus Isolated from an Endangered Northern Royal Albatross (Diomedea sanfordi)
Creators: name: Sarker, Subir
name: Ajani Athukorala
name: Tadiwa Nyandowe
name: Bowden, Timothy R
name: Boyle, David B
Publisher: name: La Trobe
Year: 2021
Subjects: Uncategorized

description: Marine bird populations have been declining globally with the factors driving this decline not fully understood. Viral diseases, including those caused by poxviruses, are a concern for endangered seabird species. In this study we have characterised a novel avipoxvirus, tentatively designated albatrosspox virus (ALPV), isolated from a skin lesion of an endangered New Zealand northern royal albatross (Diomedea sanfordi). The ALPV genome was 351.9 kbp in length and contained 336 predicted genes, seven of which were determined to be unique. The highest number of genes (313) in the ALPV genome were homologs of those in shearwaterpox virus 2 (SWPV2), while a further 10 were homologs to canarypox virus (CNPV) and an additional six to shearwaterpox virus 1 (SWPV1). Phylogenetic analyses positioned the ALPV genome within a distinct subclade comprising recently isolated avipoxvirus genome sequences from shearwater, penguin and passerine bird species. This is the first reported genome sequence of ALPV from a northern royal albatross and will help to track the evolution of avipoxvirus infections in this endangered species.
Numerical evaluation of the partition-function for one-dimensional quantum-systems
Creators: name: Morgenstern, Ingo
name: Würtz, D.
Publisher: name: Universität Regensburg
Year: 1985
Subjects: subject: 530 Physik

description: We present a ‘‘numerically exact’’ method to obtain the partition function of one-dimensional quantum systems. The method is suitable for Cray I supercomputers. As an example, for the potential of the method we publish results for random XY and Heisenberg chains.
Classification of Wildfires from MODIS Data Using Neural Networks
Creators: name: MacKinnon, James
name: Ames, Troy
name: Mandl, Dan
name: Ichoku, Charles
name: Ellison, Luke
name: Manning, Jacob
name: Sosis, Baram
Publisher: name: Maryland Shared Open Access Repository
Year: 2017
Subjects: Computer Programming And Software

description: Machine Learning Workshop, Mountain View, CA, USA, August 29, 2017
description: Wildfires are destructive to both life and property, which necessitates an approach to quickly and autonomously detect these events from orbital observatories. This talk will introduce a neural network based approach for classifying wildfires in MODIS multispectral data, and will show how it could be applied to a constellation of low-cost CubeSats. The approach combines training a deep neural network on the ground using high performance consumer GPUs, with a highly optimized inference system running on a flight-proven embedded processor. Normally neural networks execute on hardware orders of magnitude more powerful than anything found in a space-based computer, therefore the inference system is designed to be performance even on the most modest of platforms. This implementation is able to be significantly more accurate than previous neural network implementations, while also approaching the accuracy of the state-of-the-art MODFIRE data products.
Limitations of the stochastic diagonalization and the projector QMC in the 2D Hubbard model
Creators: name: Fettes, Werner
name: Morgenstern, Ingo
Publisher: name: Universität Regensburg
Year: 2000
Subjects: subject: (Quantum) Monte Carlo Algorithm; Exact Diagonalization; Stochastic Diagonalization; Projector Quantum Monte Carlo Algorithm; Hubbard Model; Superconductivity
subject: 530 Physik
subject: 02.70.Lq; 05.10.Ln; 71.10.Fd; 03.67.Lx

description: In the many particle physics the exact diagonalization (ED) is limited to small system sizes, like 4×4, on account of the restrictions of the computer memory. Whereas the stochastic diagonalization (SD) and the projector quantum Monte Carlo (PQMC) are not limited to a certain system size the limits in the parameter space of the analyzed physical model are at hoc not clear. For the two-dimensional tt′-Hubbard model we deduce the parameter space accessible to these two algorithms. Therefore we study several properties indicating the quality of the approximation of the ground state received by SD or PQMC algorithm. Furthermore we present strategies to derive a possible failure of one of these two algorithms without the comparison with another algorithm by analyzing the numerical simulations in detail. Therefore we compare the both algorithms with the ED and mainly SD and PQMC among themselves. Additional we present some new results concerning the sign-problem and the appropriate choice of the test wave functions in the PQMC method. This leads to a new numerical algorithm combining SD and PQMC.
The Distribution of Transit Durations for Kepler Planet Candidates and Implications for their Orbital Eccentricities
Creators: name: Moorhead, Althea V.
name: Ford, Eric B.
name: Morehead, Robert C.
name: Rowe, Jason
name: Borucki, William J.
name: Batalha, Natalie M.
name: Bryson, Stephen T.
name: Caldwell, Douglas A.
name: Fabrycky, Daniel C.
name: Gautier, Thomas N.
name: Koch, David G.
name: Holman, Matthew J.
name: Jenkins, Jon M.
name: Li, Jie
name: Lissauer, Jack J.
name: Lucas, Philip
name: Marcy, Geoffrey W.
name: Quinn, Samuel N.
name: Quintana, Elisa
name: Ragozzine, Darin
name: Shporer, Avi
name: Still, Martin
name: Torres, Guillermo
Publisher: name: arXiv
Year: 2011
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Doppler planet searches have discovered that giant planets follow orbits with a wide range of orbital eccentricities, revolutionizing theories of planet formation. The discovery of hundreds of exoplanet candidates by NASA's Kepler mission enables astronomers to characterize the eccentricity distribution of small exoplanets. Measuring the eccentricity of individual planets is only practical in favorable cases that are amenable to complementary techniques (e.g., radial velocities, transit timing variations, occultation photometry). Yet even in the absence of individual eccentricities, it is possible to study the distribution of eccentricities based on the distribution of transit durations (relative to the maximum transit duration for a circular orbit). We analyze the transit duration distribution of Kepler planet candidates. We find that for host stars with T_eff > 5100 K we cannot invert this to infer the eccentricity distribution at this time due to uncertainties and possible systematics in the host star densities. With this limitation in mind, we compare the observed transit duration distribution with models to rule out extreme distributions. If we assume a Rayleigh eccentricity distribution for Kepler planet candidates, then we find best-fits with a mean eccentricity of 0.1-0.25 for host stars with T_eff < 5100 K. We compare the transit duration distribution for different subsets of Kepler planet candidates and discuss tentative trends with planetary radius and multiplicity. High-precision spectroscopic follow-up observations for a large sample of host stars will be required to confirm which trends are real and which are the results of systematic errors in stellar radii. Finally, we identify planet candidates that must be eccentric or have a significantly underestimated stellar radius.
description: 30 pages, 19 figures
Site dilution in the fully frustrated triangular lattice in two dimensions
Creators: name: Morgenstern, Ingo
Publisher: name: Universität Regensburg
Year: 1981
Subjects: subject: 530 Physik

description: The ldquoTransfermatrix-Methodrdquo [1, 2] has been adapted to evaluate also the free energy of triangular 2–d-Ising lattices. The present work considers a model with nearest-neighbour antiferromagnetic couplings and a fraction 1–x of spins removed at random sites leading to some frustration effects. It is not yet clear if such a system shows spinglass behaviour [3, 4]. The correlation function langs 0 s R rang2 (correlation between two spins with distanceR), which is related to the Edwards-Anderson-Orderparameter, shows such a fast breakdown with distanceR that there is a clear evidence against a phase transition at finiteT. In contrast to other models [1, 2, 5] we still expect an exponential decay of {langs 0 s R rang2} av with distanceR atT=0.
ZARA, FAST FASHION, AND THE NEW GLOBAL PARADIGM FOR MARKETING COMMUNICATIONbyTing Hsuan (Vivian) Lee
Creators: name: Lee, Ting Hsuan
Publisher: name: Purdue University Graduate School
Year: 2023
Subjects: classificationCode: 350604
subject: Marketing communications

description: Studying ZARA provides valuable insights into the marketing communication strategies employed by a highly successful fashion brand. ZARA's innovative business model, which prioritizes speed, affordability, and fast fashion line turnaround, has disrupted the traditional fashion industry and created a new paradigm for fast fashion. The company's ability to rapidly create and distribute affordable, trendy clothing has made it one of the most popular fashion brands globally.Analyzing ZARA's success in marketing and communicating with customers, as well as its ability to stay ahead of fashion trends, can inform and inspire other fashion brands seeking to improve their market position. I collect and analyze data from a variety of sources, including applying the marketing mix 4Ps and 4Cs and using ZARA's FB posts as a sample to understand its social media communication strategies. The study aims to identify how these key factors contribute to ZARA's success in marketing and customer communication.ZARA's marketing communication strategies emphasize customer-centricity and responsiveness to changing fashion trends, and the effective use of social media marketing. By staying closely connected to its customers' needs and desires, ZARA can rapidly create new products and styles that resonate with its target market. Furthermore, the company's effective use of social media platforms, such as Facebook, has helped to create a strong brand identity and a loyal customer base.Overall, the study of ZARA's marketing communication strategies provides useful insights into marketing performance and what works in the fast-paced world of fast fashion. By emphasizing customer-centricity, responsiveness to changing fashion trends, and the effective use of social media marketing, fashion brands can create strong brand identities and connect with customers in meaningful ways.
Spin-glass behavior in the insulating phase of high-Tc superconductors
Creators: name: Morgenstern, Ingo
Publisher: name: Universität Regensburg
Year: 1990
Subjects: subject: 530 Physik

description: Numerical simulations for the Aharomy model are reported. Upon increased doping, the simulations show an antiferromagnetic, a spin-glass antiphase and a pure spin-glass phase. The pure spin glass is found to open a gap which might just make room for any other nonmagnetic mechanism of high-Tc superconductivity.
On the density and temperature of neutron-rich systems at the energy of vanishing flow in heavy-ion collisions
Creators: name: Gautam, Sakshi
Publisher: name: arXiv
Year: 2011
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We study nuclear dynamics at the the energy of vanishing flow for neutron-rich systems. In particular, we shall study the collision rate, density and temperature reached in a heavy-ion reaction with neutron-rich systems. We shall also study the mass dependence of these quantities. Our results indicate nearly mass independent nature for the density reached whereas a significant mass dependence exists for the temperature of neutron-rich systems.
description: 14 pages, 6 figures
Anharmonic phonons and strong electronic correlations in high-TC superconductors: A Quantum Monte Carlo study
Creators: name: Frick, M.
name: Morgenstern, Ingo
name: Von der Linden, Wolfgang
Publisher: name: Universität Regensburg
Year: 1991
Subjects: subject: 530 Physik

description: We present results of quantum simulations for a system of strongly correlated fermions coupled to anharmonic phonons. The projector Quantum Monte Carlo (PQMC) method has been employed to study ground state properties. In a parameter regime relevant for the high-Tc superconductors, the system exhibits superconductivity, characterized by off-Diagonal Long Range Order (ODLRO). Several features of the high-Tc materials can be understood.
Quark masses and strong CP violation
Creators: name: Creutz, Michael
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Two flavor QCD involves three independent mass parameters for which non-perturbative effects are not universal. This precludes matching lattice and perturbative results for non-degenerate quarks and eliminates a vanishing up quark mass as a viable solution to the strong CP problem.
description: 1 page, 1 figure; poster contribution to the conference "Quark confinement and the hadron spectrum IX," August 30 - September 10, 2010
Sulfur-bridged chromophores : polymers, copolymers and ligands for metal complexes
Creators: name: Caron, Élise
Publisher: name: University of British Columbia
Year: 2019

description: The impact of the incorporation of sulfur bridges and their oxidation on the electronic and photophysical properties of macromolecules was investigated through the synthesis of oligomers, short polymers and copolymers. In oligomers, the energies of the frontier orbitals and the band gap can be modulated with the oxidation state of the bridge along with the length of the molecule. The sulfone containing oligomers are emissive in solution and in a polymer matrix while the compounds with sulfide bridges are non-emissive. Polymers containing sulfide groups exhibit conjugated-like behavior where the length of the polymers influences the maximum absorption and emission wavelengths. The photophysical and electronic properties of the sulfone-bridged polymers do not depend on their molecular weight and behave like distinct chromophores. Incorporation of sulfur bridges in copolymers containing electron rich or electron poor comonomers influences the energies of the frontier orbitals and the photophysical behavior. Sulfide containing copolymers have smaller band gaps while the sulfone containing copolymers are more emissive. Incorporating monomers containing a N^N bidentate motif, the copolymers coordinate metal ions and the emission of the polymer decreases. Sulfur-bridged thiazoles containing a N^N bidentate motif are used as ligands for metal complexes. Homoleptic and heteroleptic complexes incorporating sulfide or sulfone N^N ligands were obtained with ruthenium(II) and copper(I) metal centers. Their structures were elucidated using NMR spectroscopy and single crystal X-ray diffraction. The ruthenium(II) heteroleptic complexes were found to undergo photoejection when irradiated in coordinating solvent with UV light. The complexes were found to be nonemissive in fluid solution at room temperature and are emissive in the solid state and at low temperature.
Quantum Monte Carlo simulations for high-Tc models
Creators: name: Morgenstern, Ingo
name: Von der Linden, Wolfgang
name: Frick, M.
name: Raedt, H. de
Publisher: name: Universität Regensburg
Year: 1990
Subjects: subject: 530 Physik

description: Numerical simulations were carried out using a projector quantum Monte Carlo method pioneered by Sorella et al. Ground state energies are presented for the single band Hubbard model for system sizes 4 x 4 to 8 x 8. The Hubbard model coupled to a two-level system (e.g. bridging oxygen) was also studied. Enhancement of superconducting susceptibilities indicates the possibility of high-Tc superconductivity.
Characterisation of Sloan Digital Sky Survey Stellar Photometry
Creators: name: Fukugita, Masataka
name: Yasuda, Naoki
name: Doi, Mamoru
name: Gunn, James E.
name: York, Donald G.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We study the photometric properties of stars in the data archive of the Sloan Digital Sky Survey (SDSS), the prime aim being to understand the photometric calibration over the entire data set. It is confirmed that the photometric calibration for point sources has been made overall tightly against the SDSS standard stars. We have also confirmed that photometric synthesis of the SDSS spectrophotometric data gives broad band fluxes that agree with broad band photometry with errors no more than 0.04 mag and little tilt along the wide range of colours, verifying that the response functions of the SDSS 2.5 m telescope system are well characterised. We locate stars in the SDSS photometric system, so that stars can roughly be classified into spectral classes from the colour information. We show how metallicity and surface gravity affect colours, and that stars contained in the SDSS general catalogue, plotted in colour space, show the distribution that matches well with what is anticipated from the variations of metallicity and surface gravity. The colour-colour plots are perfectly consistent among the three samples, stars in the SDSS general catalogue, SDSS standard stars and spectrophotometric stars of Gunn & Stryker, especially when some considerations are taken into account of the differences (primarily metallicity) of the samples. We show that the g-r - inverse temperature relation is tight and can be used as a good estimator of the effective temperature of stars over a fairly wide range of effective temperatures. We also confirm that the colours of G2V stars in the SDSS photometric system match well with the Sun.
description: 33 pages, 12 figures, submitted to AJ