cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Wiebke Vergin, Das Imperium Romanum und seine Gegenwelten. Die geographisch- ethnographischen Exkurse in den ‚Res Gestae‘ des Ammianus Marcellinus
Creators: name: Brendel, Raphael
Publisher: name: Göttinger Forum für Altertumswissenschaft
Year: 2021

description: Rezension zu: Wiebke Vergin, Das Imperium Romanum und seine Gegenwelten. Die geographisch-ethnographischen Exkurse in den ‚Res Gestae‘ des Ammianus Marcellinus. Millennium-Studien 41. Berlin/Boston: De Gruyter 2013, X + 316 S.
description: Göttinger Forum für Altertumswissenschaft, Bd. 16 (2013): Göttinger Forum für Altertumswissenschaft
Geometry of curved Yang-Mills-Higgs gauge theories
Creators: name: Fischer, Simon-Raphael
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mathematical Physics (math-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: This is my Ph.D. thesis defended at 31 May 2021, and it is devoted to the study of the geometry of curved Yang-Mills-Higgs gauge theory (CYMH GT), a theory introduced by Alexei Kotov and Thomas Strobl. This theory reformulates classical gauge theory, in particular, the Lie algebra (and its action) is generalized to a Lie algebroid $E$, equipped with a connection $\nabla$, and the field strength has an extra term $ζ$. In the classical situation $E$ is an action Lie algebroid, $\nabla$ is then the canonical flat connection with respect to such an $E$, and $ζ\equiv 0$. The shortened main results of this Ph.D.thesis are the following; see the abstract in the thesis itself for more information: 1. Reformulating curved Yang-Mills-Higgs gauge theory, also including a thorough introduction and a coordinate-free formulation. Especially the infinitesimal gauge transformation will be generalized to a derivation on vector bundle $V$-valued functionals, induced by a Lie algebroid connection. 2. We will discuss what type of connection for the definition of the infinitesimal gauge transformation should be used, and this is argued by studying the commutator of two infinitesimal gauge transformations, viewed as derivations on $V$-valued functionals. We take the connection on $W$ then in such a way that the commutator is again an infinitesimal gauge transformation. 3. Defining an equivalence of CYMH GTs given by a field redefinition. In order to preserve the physics, this equivalence is constructed in such a way that the Lagrangian of the studied theory is invariant under this field redefinition. It is then natural to study whether there are equivalence classes admitting representatives with flat $\nabla$ and/or zero $ζ$, and we will do so especially for Lie algebra bundles, tangent bundles and their direct products as Lie algebroids.
description: This is my Ph.D. thesis which I have defended on 31 May 2021, in total 293 pages; the thesis lists a more detailed abstract about my main results; newer versions with several corrected typos, clarified texts etc
Natural Language Processing and Semantic Tools: A Roadmap towards publishing law as data
Creators: name: Rodríguez-Doncel, Víctor
Publisher: name: Zenodo
Year: 2019
Subjects: Natural language processing
Law as data
CRC Demo portal

description: Australian Federal Legislation is published by the Federal Register of Legislation with an open license but in formats difficult to be processed by computers. Text mining and NLP algorithms need this collection to be offered as plain text file, semantic technologies need the information to be structured and interoperable. This deliverable proposes a roadmap towards publishing law as data and describes early results of a sketch implementation. As a result of this effort, a corpus with 884 principal Acts in force as of 29 December 2018 (Australian Federal Legislation) has been generated. The dataset can be referenced, is permanently online (with DOI 10.5281/zenodo.2528149) and is offered in two forms (1) as pure txt documents (2) as RDF Turtle documents following the ELI schema (European Legislation Identifier ontology).
description: DC25008: Compliance by Design (CbD) and Compliance through Design (CtD) solutions to support automated information sharing (2018-19). Law and Policy. Project C. Spent Convictions Use Case. Australian Government funded Data to Decisions Cooperative Research Centre (2018-2019), end-user: Australian Criminal Intelligence Commission.
Alessandro Naso (Hg.), Tumuli e sepolture monumentali nella protostoria europea
Creators: name: Huguenot, Caroline
Publisher: name: Göttinger Forum für Altertumswissenschaft
Year: 2021

description: Rezension zu: Alessandro Naso (Hg.), Tumuli e sepolture monumentali nella protostoria europea. Atti del convegno internazionale Celano, 21-24 settembre 2000. RGZM, Tagungen 5. Regensburg: Schnell und Steiner Verlag 2011, 310 S.
description: Göttinger Forum für Altertumswissenschaft, Bd. 16 (2013): Göttinger Forum für Altertumswissenschaft
The Fokas-Lenells equations: Bilinear approach
Creators: name: Liu, Shu-zhi
name: Wang, Jing
name: Zhang, Da-jun
Publisher: name: arXiv
Year: 2021
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: In this paper, the Fokas-Lenells equations are investigated via bilinear approach. We bilinearize the unreduced Fokas-Lenells system, derive double Wronskian solutions, and then, by means of a reduction technique we obtain variety of solutions of the reduced equations. This enables us to have a full profile of solutions of the classical and nonlocal Fokas-Lenells equations. Some obtained solutions are illustrated based on asymptotic analysis. As a notable new result, we obtain solutions to the Fokas-Lenells equation, which are related to real discrete eigenvalues and not reported before in the analytic approaches. These solutions behave like (multi-)periodic waves or solitary waves with algebraic decay. In addition, we also obtain solutions to the two-dimensional massive Thirring model from those of the Fokas-Lenells equation.
description: 32 pages, 11 figures, appendixes and references updated
Explorations of the r-Processes: Comparisons between Calculations and Observations of Low-Metallicity Stars
Creators: name: Kratz, Karl-Ludwig
name: Farouqi, Khalil
name: Pfeiffer, Bernd
name: Truran, James W.
name: Sneden, Christopher
name: Cowan, John J.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Abundances of heavier elements (barium and beyond) in many neutron-capture-element-rich halo stars accurately replicate the solar system r-process pattern. However, abundances of lighter neutron-capture elements in these stars are not consistent with the solar system pattern. These comparisons suggest contributions from two distinct types of r-process synthesis events -- a so called main r-process for the elements above the 2nd r-process peak and a weak r-process for the lighter neutron-capture elements. We have performed r-process theoretical predictions to further explore the implications of the solar and stellar observations. We find that the isotopic composition of barium and the elemental Ba/Eu abundance ratios in r-process-rich low metallicity stars can only be matched by computations in which the neutron densities are in the range 23< log n_n < 28, values typical of the main r-process. For r-process conditions that successfully generate the heavy element pattern extending down to A=135, the relative abundance of I129 produced in this mass region appears to be at least 90% of the observed solar value. Finally, in the neutron number density ranges required for production of the observed solar/stellar 3rd r-process-peak (A~200), the predicted abundances of inter-peak element hafnium (Z=72, A~180) follow closely those of 3rd-peak elements and lead. Hf, observable from the ground and close in mass number to the 3rd r-process-peak elements, might also be utilized as part of a new nuclear chronometer pair, Th/Hf, for stellar age determinations.
description: 42 pages, 2 tables, 12 figures; To appear in the Astrophysical Journal
Donald Clause Realtor Map, Acabonack Harbor Canoe Race Route
Creators: name: Unknown
name: Springs Historical Society/Library
Publisher: name: Unknown
Year: 0
Subjects: Springs
East Hampton
Maps
Canoes
Regattas

description: This map shows the highlight route for the Great Bonac Canoe Race within Acabonack Harbor. This printed map likely comes from an advertisement from Donald J. Clause Realtor Office.
description: This material was lent to the Long Island Collection by the Springs Historical Society Library for digitization purposes.
Canals in Milky Way radio polarization maps
Creators: name: Fletcher, Andrew
name: Shukurov, Anvar
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Narrow depolarized canals are common in maps of the polarized synchrotron emission of the Milky Way. Two physical effects that can produce these canals have been identified: the presence of Faraday rotation measure ($\RM$) gradients in a foreground screen and the cumulative cancellation of polarization known as differential Faraday rotation. We show that the behaviour of the Stokes parameters $Q$ and $U$ in the vicinity of a canal can be used to identify its origin. In the case of canals produced by a Faraday screen we demonstrate that, if the polarization angle changes by $90\degr$ across the canal, as is observed in all fields to-date, the gradients in $\RM$ must be discontinuous. Shocks are an obvious source of such discontinuities and we derive a relation of the expected mean separation of canals to the abundance and Mach number of supernova driven shocks, and compare this with recent observations by \citet{Haverkorn03}. We also predict the existence of less common canals with polarization angle changes other than $90\degr$. Differential Faraday rotation can produce canals in a uniform magneto-ionic medium, but as the emitting layer becomes less uniform the canals will disappear. We show that for moderate differences in emissivity in a two-layer medium, of up to 1/2, and for Faraday depth fluctuations of standard deviation $\lesssim 1 \mathrm{rad}$, canals produced by differential rotation will still be visible.
description: Accepted for publication in MNRAS Letters. 5 pages, 3 figures
Mean field fracture in disordered solids: statistics of fluctuations
Creators: name: da Rocha, Hudson Borja
name: Truskinovsky, Lev
Publisher: name: arXiv
Year: 2021
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: Power law distributed fluctuations are known to accompany \emph{terminal} failure in disordered brittle solids. The associated intermittent scale-free behavior is of interest from the fundamental point of view as it emerges universally from an intricate interplay of threshold-type nonlinearity, quenched disorder, and long-range interactions. We use the simplest mean-field description of such systems to show that they can be expected to undergo a transition between brittle and quasi-brittle (ductile) responses. While the former is characterized by a power law distribution of avalanches, in the latter, the statistics of avalanches is predominantly Gaussian. The realization of a particular regime depends on the variance of disorder and the effective rigidity represented by a combination of elastic moduli. We argue that the robust criticality, as in the cases of earthquakes and collapsing porous materials, indicates the self-tuning of the system towards the boundary separating brittle and ductile regimes.
description: 24 pages, 15 figures
Optimum bird flock size in formation flight
Creators: name: Kshatriya, Mrigesh
Publisher: name: University of British Columbia
Year: 2010

description: A theoretical model of flock size in migrating birds is developed. Although previous models of formation flight in birds show improved flight performance, they do not explain flock size variation across bird species or at different times of the year for a given bird species. This model captures some of the diversity in flock size observed in nature by incorporating energetic costs of flight and energy income from foraging. It turns out that within a myriad of possible flock sizes there - is one that is optimal for maximizing energetic efficiency (net energetic gain/energy expenditure) for a given maximum range speed, which minimizes flying cost per unit distance flown, and under certain migration conditions (i.e. flight distance and total time to complete the journey). Net energetic gain from foraging equals the rate of prey encountered times the time spent foraging. Energy expenditure from flying is determined from formation flight theory for a fixed wing aircraft. The benefit of formation flight, as derived from an approximation technique, is represented in close-form. This expression is a function of flock size and wing-tip spacing (WTS) and simplifies flight cost calculations. Under certain WTS, a good approximation to the induced drag for a member of a flock of size n is 1/nth of the induced drag of a single bird. In addition, optimum flight speed of a flock is (1/n)⅟₄ of the optimum flight speed of a single individual. The approach taken here allows the prediction of flock size in migrating birds. Model results are discussed in relation to observation of flock size under various migration conditions. If migration is constrained by hours of daylight, seasional variation in flock size is expected if the start time of the north and southward migration are asymmetrical with respect to the summer solstice (June 21). Under certain conditions, such as long non-stop migration, solo flight is an optimum migratory strategy.
Portuguese eyewitness accounts of the great space weather event of 1582
Creators: name: Carrasco, V. M. S.
name: Vaquero, J. M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Popular Physics (physics.pop-ph)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: History and Philosophy of Physics (physics.hist-ph)
subject: FOS: Physical sciences

description: Newly discovered descriptions about the great aurora observed in March 1582 are presented in this work. These records were made by Portuguese observers from Lisbon. Both records described the aurora like a great fire in the northern part of the sky. It was observed during three consecutive nights, according to one of the sources. Thus, we present a discussion of these auroral records in order to complement other works that studied the aurora sighted in March 1582.
Joseph Georg Wolf, Die Lex Irnitana. Ein römisches Stadtrecht aus Spanien. Lateinisch und Deutsch. Herausgegeben, eingeleitet und übersetzt
Creators: name: Eich, Peter
Publisher: name: Göttinger Forum für Altertumswissenschaft
Year: 2021

description: Rezension zu: Joseph Georg Wolf, Die Lex Irnitana. Ein römisches Stadtrecht aus Spanien. Lateinisch und Deutsch. Herausgegeben, eingeleitet und übersetzt. Texte zur Forschung 101. Darmstadt: Wissenschaftliche Buchgesellschaft 2011, 159 S., 3 s/w-Abb. und 1 Kt.
description: Göttinger Forum für Altertumswissenschaft, Bd. 16 (2013): Göttinger Forum für Altertumswissenschaft
A Survey of Stability Results for Redundancy Systems
Creators: name: Anton, Elene
name: Ayesta, Urtzi
name: Jonckheere, Matthieu
name: Verloop, Ina Maria
Publisher: name: arXiv
Year: 2021
Subjects: subject: Performance (cs.PF)
subject: Probability (math.PR)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: Redundancy mechanisms consist in sending several copies of a same job to a subset of servers. It constitutes one of the most promising ways to exploit diversity in multiservers applications. However, its pros and cons are still not sufficiently understood in the context of realistic models with generic statistical properties of service-times distributions and correlation structures of copies. We aim at giving a survey of recent results concerning the stability-arguably the first benchmark of performance-of systems with cancel-oncompletion redundancy. We also point out open questions and conjectures.
Dieter Flach (Hg.), Properz – Elegien. Lateinisch und deutsch. Herausgegeben, eingeleitet und übersetzt von D.F. / Ders., Properz – Elegien. Kommentar von D.F. / Hans Peter Syndikus, Die Elegien des Properz. Eine Interpretation
Creators: name: Weitz, Friedemann
Publisher: name: Göttinger Forum für Altertumswissenschaft
Year: 2021

description: Rezension zu: Dieter Flach (Hg.), Properz – Elegien. Lateinisch und deutsch. Herausgegeben, eingeleitet und übersetzt von D.F. Texte zur Forschung 99. Darmstadt: Wissenschaftliche Buchgesellschaft 2011, VII + 287 S. Rezension zu: Ders., Properz – Elegien. Kommentar von D.F. Darmstadt: Wissenschaftliche Buchgesellschaft 2011, 310 S. Rezension zu: Hans Peter Syndikus, Die Elegien des Properz. Eine Interpretation. Darmstadt: Wissenschaftliche Buchgesellschaft 2010, 373 S.
description: Göttinger Forum für Altertumswissenschaft, Bd. 16 (2013): Göttinger Forum für Altertumswissenschaft
Repurposing population genetics data to discern genomic architecture: A case study of linkage cohort detection in mountain pine beetle (Dendroctonus ponderosae)
Creators: Trevoy, Stephen A.L.
Janes, Jasmine K.
Muirhead, Kevin
Sperling, Felix A. H.
Publisher: name: University of Alberta Library
Year: 2019

Genetic surveys of the population structure of species can be used as resources for exploring their genomic architecture. By adjusting filtering assumptions, genomewide single-nucleotide polymorphism (SNP) datasets can be reused to give new insights into the genetic basis of divergence and speciation without targeted resampling of specimens. Filtering only for missing data and minor allele frequency, we used a combination of principal components analysis and linkage disequilibrium network analysis to distinguish three cohorts of variable SNPs in the mountain pine beetle in western Canada, including one that was sex-linked and one that was geographically associated. These marker cohorts indicate genomically localized differentiation, and their detection demonstrates an accessible and intuitive method for discovering potential islands of genomic divergence without a priori knowledge of a species’ genomic architecture. Thus, this method has utility for directly addressing the genomic architecture of species and generating new hypotheses for functional research.
Monte-Carlo Applications for Partially Polarised Inverse External-Compton Scattering (MAPPIES) -- I. Description of the code and First Results
Creators: name: Dreyer, Lenté
name: Böttcher, Markus
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The radiation mechanisms responsible for the multiwavelength emission from relativistic jet sources are poorly understood. The modelling of the spectral energy distributions (SEDs) and light curves alone is not adequate to distinguish between existing models. Polarisation in the $X$-ray and $γ$-ray regime of these sources may provide new and unique information about the jet physics and radiation mechanisms. Several upcoming projects will be able to deliver polarimetric measurements of the brightest $X$-ray sources, including active galactic nuclei (AGN) jets and $γ$-ray bursts (GRBs). This article describes the development of a new Monte-Carlo code -- MAPPIES (Monte-Carlo Applications for Partially Polarised Inverse External-Compton Scattering) -- for polarisation-dependent Compton scattering in relativistic jet sources. Generic results for Compton polarisation in the Thomson and Klein-Nishina regimes are presented.
description: Paper is published in The Astrophysical Journal
Stéphane Ratti, Antiqvvs error. Les ultimes feux de la résistance païenne, ‚Scripta varia‘ augmentés de cinq études inédites
Creators: name: Brendel, Raphael
Publisher: name: Göttinger Forum für Altertumswissenschaft
Year: 2021

description: Rezension zu: Stéphane Ratti, Antiqvvs error. Les ultimes feux de la résistance païenne, ‚Scripta varia‘ augmentés de cinq études inédites. Bibliothèque de l’antiquité tardive 14. Turnhout: Brepols Publishers Verlag 2010, 328 S.
description: Göttinger Forum für Altertumswissenschaft, Bd. 16 (2013): Göttinger Forum für Altertumswissenschaft
New thermodynamic activity-based approach allows predicting the feasibility of glycolysis
Creators: name: Greinert, Thorsten
name: Vogel, Kristina
name: Maskow, Thomas
name: Held, Christoph
Publisher: name: TU Dortmund
Year: 2021
Subjects: subject: Biocatalysis
subject: Biochemistry
subject: Biosynthesis
subject: Catalysis
subject: Chemical engineering
subject: FOS: Chemical engineering
subject: Enzymes
subject: Physical chemistry
subject: Chemical synthesis
subject: 660

description: Thermodynamic feasibility analyses help evaluating the feasibility of metabolic pathways. This is an important information used to develop new biotechnological processes and to understand metabolic processes in cells. However, literature standard data are uncertain for most biochemical reactions yielding wrong statements concerning their feasibility. In this article we present activity-based equilibrium constants for all the ten glycolytic reactions, accompanied by the standard reaction data (standard Gibbs energy of reaction and standard enthalpy of reaction). We further developed a thermodynamic activity-based approach that allows to correctly determine the feasibility of glycolysis under different chosen conditions. The results show for the first time that the feasibility of glycolysis can be explained by thermodynamics only if (1) correct standard data are used and if (2) the conditions in the cell at non-equilibrium states are accounted for in the analyses. The results here will help to determine the feasibility of other metabolisms and to understand metabolic processes in cells in the future.
description: Scientific reports;11
Survey on Regulatory and Legal Compliance: Legal Quadrant and Conceptual Clustering
Creators: name: Casanovas, Pompeu
name: Hashmi, Mustafa
Publisher: name: Zenodo
Year: 2019
Subjects: Rule of law
Legal quadrant for the rule of law
Clustering of legal concepts
Survey methodology

description: We present in this Deliverable: a regulatory quadrant to describe the rule of law; a cluster of concepts to describe instruments and processes of the law; the methodology followed to select the technical papers concerning regulatory compliance; and an initial mapping to frame the selected papers about legal compliance that we will use in our final survey. The result is a conceptual clustering that is useful to analyse and differentiate compliance by (CbD) and through (CtD) design. This outcome is work in progress: it will evolve as the legal analysis is developed. Preliminary results have been also presented at Casanovas et al (2017), and Hashmi et al. (2018b). A comprehensive explanation of the legal quadrant can be found in Casanovas (2019) (in Poblet et al 2019, chapter 5). A recent survey on business and regulatory compliance can be found at Hashmi et al. (2018a).
description: DC25008: Compliance by Design (CbD) and Compliance through Design (CtD) solutions to support automated information sharing (2018-19). Law and Policy. Project C. Spent Convictions Use Case. Australian Government funded Data to Decisions Cooperative Research Centre (2018-2019), end-user: Australian Criminal Intelligence Commission.
Rainer Wiegels, Kleine Schriften zur Epigraphik und Militärgeschichte der germanischen Provinzen
Creators: name: Schipp, Oliver
Publisher: name: Göttinger Forum für Altertumswissenschaft
Year: 2021

description: Rezension zu: Rainer Wiegels, Kleine Schriften zur Epigraphik und Militärgeschichte der germanischen Provinzen, hrsg. von Krešimir Matijević/Wolfgang Spickermann. Stuttgart: Franz Steiner Verlag 2010, 643 S., 161 s/w-Abb. , 13 Taf. und 5 Ktn.
description: Göttinger Forum für Altertumswissenschaft, Bd. 16 (2013): Göttinger Forum für Altertumswissenschaft
An algebro-geometric model for the shape of supercoiled DNA
Creators: name: Matsutani, Shigeki
name: Previato, Emma
Publisher: name: arXiv
Year: 2021
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Mathematical Physics (math-ph)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: Biological Physics (physics.bio-ph)
subject: Medical Physics (physics.med-ph)
subject: FOS: Physical sciences

description: This article proposes a model including thermal effects for closed supercoiled DNA. Existing models include an elastic rod. Euler's elastica, ideal elastic rods on a plane, have only two kinds of closed shapes, the circle and a figure-eight, realized as minima of the Euler-Bernoulli energy. Even considering three dimensional effects, this elastica model provides much simpler shapes than observed via Atomic-Force Microscope (AFM), since the minimal points of the energy are expressed by elliptic functions. In this paper, by a generalization of elastica, we obtain shapes determined by data of hyperelliptic curves, which partially reproduce the shapes and properties of the DNA.
description: 23 pages
Waterfront development in the post-industrial city : a profile
Creators: name: Mikicich, Stephen Nenad
Publisher: name: University of British Columbia
Year: 2010

description: The purpose of this thesis is to analyze the significance of waterfront redevelopment in the post-industrial city. The context for this analysis is the advent of post-industrial society - as evidenced by the economic, social and physical restructuring of cities. My objectives in undertaking this research are to gain a better understanding of planning issues in waterfront redevelopment; to examine the use of waterfront redevelopment as a policy tool for achieving community objectives; and to ascertain the broader implications of waterfront redevelopment in post-industrial society. My research is based on an extensive literature review, several interviews, and more in-depth study of selected waterfront projects. The significance of urban waterfront redevelopment is studied from three different perspectives: (i) the physical restructuring of cities in the post-industrial period; (ii) the experiences of various waterfront communities; and (iii) the case study of New Westminster, British Columbia. Waterfront redevelopment is significant in the post-industrial city as a public policy tool for achieving broader social and economic development objectives. Through the redevelopment of their waterfronts, communities have an opportunity to redress a range of social and economic issues. The social development potential is seldom realized, however, because redevelopment is primarily commercially-motivated. In theory, the urban waterfront has been reclaimed for all residents of the post-industrial city. The notion of public access and the creation of public amenities are fundamental principles of waterfront development. In practice, however, the benefits of a revitalized waterfront are not shared equally. As the waterfront profiles demonstrate, the nature of the waterfront land-use mix is generally biased towards high-end commercial development and luxury housing. The nature and form of new waterfront developments raises questions about elitism and equity in the post-industrial city. If some level of economic integration is not achieved, the waterfront will not have been reclaimed for all residents of the post-industrial city, but, rather - for the post-industrial urban elite.
Probing the Formation of Low Mass X-ray Binaries in Globular Clusters and the Field
Creators: name: Kundu, Arunav
name: Maccarone, Thomas J.
name: Zepf, Stephen E.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present an analysis of low mass X-ray binaries (LMXBs) and globular clusters (GCs) in five galaxies using Chandra, and HST data. Of the 186 LMXBs within the optical fields 71 are in GCs, confirming that LMXBs are formed particularly efficiently in GCs. However, there is no statistically significant correlation between the distance of a GC from the center of its host galaxy and its LMXB hosting probability. Metal-rich GCs are 3.4 times more likely to host LMXBs than metal-poor ones. Intriguingly, the LMXBs in NGC 1399 are preferentially in the reddest GCs of the metal-rich subsystem. This indicates that the red peak of the color distribution itself encompasses GCs with a range of enrichment histories. The strength of this effect varies from galaxy to galaxy, possibly indicating differences in their metal-enrichment histories. Field LMXBs in our program galaxies are more concentrated towards the center of their host galaxies than GC-LMXBs. This suggests that a majority of field LMXBs are formed in situ and have not escaped from current GCs. This is consistent with previous specific frequency based studies. The brightest LMXBs in GCs appear to be preferentially associated with luminous, metal-rich clusters. We show that it is probable that some of these GCs host multiple bright LMXBs, while the probability is much lower for metal-poor GCs. This implies that LMXBs in more metal-rich cluster systems should reveal a longer high luminosity X-ray tail, and show less X-ray variability than metal-poor cluster populations. (abridged)
description: Accepted for publication in ApJ. 20 pages, 8 Figures, 17 tables (truncated). Complete tables included in source files
Nucleon Electromagnetic Form Factors
Creators: name: Perdrisat, C. F.
name: Punjabi, V.
name: Vanderhaeghen, M.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: There has been much activity in the measurement of the elastic electromagnetic proton and neutron form factors in the last decade, and the quality of the data has been greatly improved by performing double polarization experiments, in comparison with previous unpolarized data. Here we review the experimental data base in view of the new results for the proton, and neutron, obtained at MIT-Bates, MAMI, and JLab. The rapid evolution of phenomenological models triggered by these high-precision experiments will be discussed, including the recent progress in the determination of the valence quark generalized parton distributions of the nucleon, as well as the steady rate of improvements made in the lattice QCD calculations.
description: 71 pages, 43 figures (published version with typos corrected)
AMS :: ATX October 2019 Blog Archive
Creators: name: Department Of American Studies
Publisher: name: American Studies
Year: 2019
Subjects: American Studies
Twitter

description: Contents: Five Questions with First-Years Returns! An Interview with Coyote Shook -- What I Did On My Summer Vacation: Josh Kopin on Talking Le Guin in Paris -- A Conversation with Angie Maxwell (PhD 2008), author of “The Long Southern Strategy” (2019) -- AMS 356 Students “Meme” Cultural History -- American Indian and Indigenous Education in Texas: A 2019 “Indigenous Peoples’ Day” Forum (Monday, 10/14) -- Tomorrow (10/16): “1619-1919-2019” Symposium -- New Episode of Dr. Lauren Gutterman’s “Sexing History” Podcast: “Let’s Dance!” -- This Thursday (10/24): “Convict Leasing in Texas” Moderated by Dr. Shirley Thompson -- UT AMS Hosts “Second Annual” PechaKucha -- UT AMS PhD Candidate Gaila Sims Interviews UT Provost Maurie McInnis
description: @AmStudies is a Twitter feed dedicated to representing the many activities and interests of the department of American Studies at The University of Texas at Austin. Together with the department’s blog, this feed exists to serve the AMS and Austin communities by acting as a hub for up-to-date information on events and opportunities at UT and beyond.
Ingemar König (Hg.), Lucius Ampelius, Liber memorialis. Was ein junger Römer wissen soll. Herausgegeben, eingeleitet und übersetzt
Creators: name: Lindermann, Jens-Olaf
Publisher: name: Göttinger Forum für Altertumswissenschaft
Year: 2021

description: Rezension zu: Ingemar König (Hg.), Lucius Ampelius, Liber memorialis. Was ein junger Römer wissen soll. Herausgegeben, eingeleitet und übersetzt. Texte zur Forschung Bd. 94. Darmstadt: Wissenschaftliche Buchgesellschaft 22011, 150 S.
description: Göttinger Forum für Altertumswissenschaft, Bd. 16 (2013): Göttinger Forum für Altertumswissenschaft
Effects of non-uniform acceptance in anisotropic flow measurement
Creators: name: Selyuzhenkov, Ilya
name: Voloshin, Sergei
Publisher: name: arXiv
Year: 2007
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Applicability of anisotropic flow measurement techniques and their extension for detectors with non-uniform azimuthal acceptance are discussed. Considering anisotropic flow measurement with two and three (mixed harmonic) azimuthal correlations we introduce a set of observables based on the x and y components of the event flow vector. These observables provide independent measures of anisotropic flow, and can be used to test self-consistency of the analysis. Based on these observables we propose a technique that explicitly takes into account the effects of non-uniform detector acceptance. Within this approach the acceptance corrections, as well as parameters which define the method applicability, can be determined directly from experimental data. For practical purposes a brief summary of the method is provided at the end.
description: 7 pages, minor changes, discussion on the multiplicity correlations due to detector effects has been expanded
Günther Schörner – Darja Šterbenc Erker (Hgg.), Medien religiöser Kommunikation im Imperium Romanum
Creators: name: Klingenberg, Andreas
Publisher: name: Göttinger Forum für Altertumswissenschaft
Year: 2021

description: Rezension zu: Günther Schörner – Darja Šterbenc Erker (Hgg.), Medien religiöser Kommunikation im Imperium Romanum. Potsdamer Altertumswissenschaftliche Beiträge Bd. 24. Stuttgart: Franz Steiner Verlag 2008, 148 S., 15 s/w-Abb.
description: Göttinger Forum für Altertumswissenschaft, Bd. 16 (2013): Göttinger Forum für Altertumswissenschaft
Synchrotron signatures from the cosmic-ray driven dynamo
Creators: name: Wóltański, Dominik
name: Ogrodnik, Mateusz
name: Hanasz, Michał
Publisher: name: Zenodo
Year: 2019
Subjects: galaxies
cosmic rays
dynamo
MHD simulations

description: Poster presented at the conference "New Perspectives on Galactic Magnetism" in Newcastle, UK, 10-14 June 2019.
description: This work has been supported by the National Science Centre, Poland, through the grant No. 2015/19/ST9/02959. Calculations were carried out at the Academic Computer Centre in Gdańsk.
Johannes Engels (Hg.), Lykurg. Rede gegen Leokrates. Griech./dt.
Creators: name: Kirchner, Roderich
Publisher: name: Göttinger Forum für Altertumswissenschaft
Year: 2021

description: Rezension zu: Johannes Engels (Hg.), Lykurg. Rede gegen Leokrates. Griech./dt. Herausgegeben, eingeleitet und übersetzt von Johannes Engels. Texte zur Forschung (TZF). Darmstadt: Wissenschaftliche Buchgesellschaft 2008, 208 S.
description: Göttinger Forum für Altertumswissenschaft, Bd. 16 (2013): Göttinger Forum für Altertumswissenschaft
DNA Supercoiling Drives a Transition between Collective Modes of Gene Synthesis
Creators: name: Chatterjee, Purba
name: Goldenfeld, Nigel
name: Kim, Sangjin
Publisher: name: arXiv
Year: 2021
Subjects: subject: Subcellular Processes (q-bio.SC)
subject: Biological Physics (physics.bio-ph)
subject: Quantitative Methods (q-bio.QM)
subject: FOS: Biological sciences
subject: FOS: Physical sciences

description: Recent experiments showed that multiple copies of the molecular machine RNA polymerase (RNAP) can efficiently synthesize mRNA collectively in the active state of the promoter. However, environmentally-induced promoter repression results in long-distance antagonistic interactions that drastically reduce the speed of RNAPs and cause a quick arrest of mRNA synthesis. The mechanism underlying this transition between cooperative and antagonistic dynamics remains poorly understood. In this Letter, we introduce a continuum deterministic model for the translocation of RNAPs, where the speed of an RNAP is coupled to the local DNA supercoiling as well as the density of RNAPs on the gene. We assume that torsional stress experienced by individual RNAPs is exacerbated by high RNAP density on the gene and that transcription factors act as physical barriers to the diffusion of DNA supercoils. We show that this minimal model exhibits two transcription modes mediated by the torsional stress: a fluid mode when the promoter is active and a torsionally stressed mode when the promoter is repressed, in quantitative agreement with experimentally observed dynamics of co-transcribing RNAPs. Our work provides an important step towards understanding the collective dynamics of molecular machines involved in gene expression.
Improving the speckle noise attenuation of simultaneous spectral differential imaging with a focal plane holographic diffuser
Creators: name: Lafrenière, David
name: Doyon, René
name: Artigau, Daniel Nadeau Étienne
name: Marois, Christian
name: Beaulieu, Mathilde
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Direct exoplanet detection is limited by speckle noise in the point spread function (PSF) of the central star. This noise can be reduced by subtracting PSF images obtained simultaneously in adjacent narrow spectral bands using a multi-channel camera (MCC), but only to a limit imposed by differential optical aberrations in the MCC. To alleviate this problem, we suggest the introduction of a holographic diffuser at the focal plane of the MCC to convert the PSF image into an incoherent illumination scene that is then re-imaged with the MCC. The re-imaging is equivalent to a convolution of the scene with the PSF of each spectral channel of the camera. Optical aberrations in the MCC affect only the convolution kernel of each channel and not the PSF globally, resulting in better correlated images. We report laboratory measurements with a dual channel prototype (1.575 micron and 1.625 micron) to validate this approach. A speckle noise suppression factor of 12-14 was achieved, an improvement by a factor ~5 over that obtained without the holographic diffuser. Simulations of realistic exoplanet populations for three representative target samples show that the increase in speckle noise attenuation achieved in the laboratory would roughly double the number of planets that could be detected with current adaptive optics systems on 8-m telescopes.
description: 9 pages, 8 figure, to be published in ApJ June 20, 2007
Superlattice Patterns in the Complex Ginzburg-Landau Equation with Multi-Resonant Forcing
Creators: name: Conway, J. M.
name: Riecke, H.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences

description: Motivated by the rich variety of complex patterns observed on the surface of fluid layers that are vibrated at multiple frequencies, we investigate the effect of such resonant forcing on systems undergoing a Hopf bifurcation to spatially homogeneous oscillations. We use an extension of the complex Ginzburg-Landau equation that systematically captures weak forcing functions with a spectrum consisting of frequencies close to the 1:1-, the 1:2-, and the 1:3-resonance. By slowly modulating the amplitude of the 1:2-forcing component we render the bifurcation to subharmonic patterns supercritical despite the quadratic interaction introduced by the 1:3-forcing. Our weakly nonlinear analysis shows that quite generally the forcing function can be tuned such that resonant triad interactions with weakly damped modes stabilize subharmonic patterns comprised of four or five Fourier modes, which are similar to quasi-patterns with 4-fold and 5-fold rotational symmetry, respectively. Using direct simulations of the extended complex Ginzburg-Landau equation we confirm our weakly nonlinear analysis. In simulations domains of different complex patterns compete with each other on a slow time scale. As expected from energy arguments, with increasing strength of the triad interaction the more complex patterns eventually win out against the simpler patterns. We characterize these ordering dynamics using the spectral entropy of the patterns. For system parameters reported for experiments on the oscillatory Belousov-Zhabotinsky reaction we explicitly show that the forcing parameters can be tuned such that 4-mode patterns are the preferred patterns.
description: 22 pages, 18 figures (38 total plots and pictures). For associated .mov files, see http://www.esam.northwestern.edu/~riecke/research/ModCGL/Movies
Dissipative cooling induced by pulse perturbations
Creators: name: Nava, Andrea
name: Fabrizio, Michele
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We investigate the dynamics brought on by an impulse perturbation in two infinite-range quantum Ising models coupled to each other and to a dissipative bath. We show that, if dissipation is faster the higher the excitation energy, the pulse perturbation cools down the low-energy sector of the system, at the expense of the high-energy one, eventually stabilising a transient symmetry-broken state at temperatures higher than the equilibrium critical one. Such non-thermal quasi-steady state may survive for quite a long time after the pulse, if the latter is properly tailored.
description: 18 pages, 11 figures
Synchrotron signatures from the cosmic-ray driven dynamo
Creators: name: Wóltański, Dominik
name: Ogrodnik, Mateusz
name: Hanasz, Michał
Publisher: name: Zenodo
Year: 2019
Subjects: galaxies
cosmic rays
dynamo
MHD simulations

description: Poster presented at the conference "New Perspectives on Galactic Magnetism" in Newcastle, UK, 10-14 June 2019.
description: This work has been supported by the National Science Centre, Poland, through the grant No. 2015/19/ST9/02959
Galina Fingarova, Die Baugeschichte der Sophienkirche in Sofia
Creators: name: Rizos, Efthymios
Publisher: name: Göttinger Forum für Altertumswissenschaft
Year: 2021

description: Rezension zu: Galina Fingarova, Die Baugeschichte der Sophienkirche in Sofia. Wiesbaden: Reichert Verlag 2011, 209 S., 199 Tafeln mit 350 Abb.
description: Göttinger Forum für Altertumswissenschaft, Bd. 16 (2013): Göttinger Forum für Altertumswissenschaft
Spin-glass-like behavior of Ge:Mn
Creators: name: Jaeger, C.
name: Bihler, C.
name: Vallaitis, T.
name: Goennenwein, S. T. B.
name: Opel, M.
name: Gross, R.
name: Brandt, M. S.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We present a detailed study of the magnetic properties of low-temperature-molecular-beam-epitaxy grown Ge:Mn dilute magnetic semiconductor films. We find strong indications for a frozen state of Ge_{1-x}Mn_{x}, with freezing temperatures of T_f=12K and T_f=15K for samples with x=0.04 and x=0.2, respectively, determined from the difference between field-cooled and zero-field-cooled magnetization. For Ge_{0.96}Mn_{0.04}, ac susceptibility measurements show a peak around T_f, with the peak position T'_f shifting as a function of the driving frequency f by Delta T_f' / [T_f' Delta log f] ~ 0.06, whereas for sample Ge_{0.8}Mn_{0.2} a more complicated behavior is observed. Furthermore, both samples exhibit relaxation effects of the magnetization after switching the magnitude of the external magnetic field below T_f which are in qualitative agreement with the field- and zero-field-cooled magnetization measurements. These findings consistently show that Ge:Mn exhibits a frozen magnetic state at low temperatures and that it is not a conventional ferromagnet.
description: Revised version contains extended interpretation of experimental data
Monte-Carlo Applications for Partially Polarized Inverse External-Compton Scattering (MAPPIES) II -- Application to the UV/Soft X-ray Excess in Blazar Spectra
Creators: name: Dreyer, Lenté
name: Böttcher, Markus
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The spectral energy distributions (SEDs) of some blazars exhibit an ultraviolet (UV) and/or soft X-ray excess, which can be modelled with different radiation mechanisms. Polarization measurements of the UV/X-ray emission from blazars may provide new and unique information about the astrophysical environment of blazar jets, and could thus help to distinguish between different emission scenarios. In this paper, a new Monte-Carlo code -- MAPPIES (Monte-Carlo Applications for Partially Polarized Inverse External-Compton Scattering) -- for polarization-dependent Compton scattering is used to simulate the polarization signatures in a model where the UV/soft X-ray excess arises from the bulk Compton process. Predictions of the expected polarization signatures of Compton emission from the soft X-ray excess in the SED of AO 0235+164, and the UV excess in the SED of 3C 279 are made for upcoming and proposed polarimetry missions.
description: Paper is accepted for publication in The Astrophysical Journal
Reduced Density Matrices and Topological Order in a Quantum Dimer Model
Creators: name: Furukawa, Shunsuke
name: Misguich, Gregoire
name: Oshikawa, Masaki
Publisher: name: arXiv
Year: 2006
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Resonating valence bond (RVB) liquids in two dimensions are believed to exhibit topological order and to admit no local order parameter of any kind. This is a defining property of "liquids" but it has been explicitly confirmed only in a few exactly solvable models. In this paper, we investigate the quantum dimer model on the triangular lattice. It possesses an RVB-type liquid phase, however, for which the absence of a local order parameter has not been proved. We examine the question numerically with a measure based on reduced density matrices. We find a scaling of the measure which strongly supports the absence of any local order parameter.
description: 6 pages, 3 figures. To appear in J. Phys.: Condens. Matter (Proceedings of "Highly Frustrated Magnets", Osaka (Japan), August 2006). Version 2: improved figures containing new data and minor changes in the text
Holger Baitinger, Waffenweihungen in griechischen Heiligtümern
Creators: name: Frielinghaus, Heide
Publisher: name: Göttinger Forum für Altertumswissenschaft
Year: 2021

description: Rezension zu: Holger Baitinger, Waffenweihungen in griechischen Heiligtümern. Monographien des Römisch-Germanischen Zentralmuseums, Bd. 94. Mainz: Schnell und Steiner Verlag 2011, 176 S., 91 s/w-Abb.
description: Göttinger Forum für Altertumswissenschaft, Bd. 16 (2013): Göttinger Forum für Altertumswissenschaft