cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The isolated elliptical galaxy NGC 5812 -- MOND or Dark Matter?
Creators: name: Richtler, Tom
name: Salinas, Ricardo
name: Lane, Richard
name: Hilker, Michael
Publisher: name: arXiv
Year: 2023
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: There exist isolated elliptical galaxies, whose dynamics can be modelled without resorting to dark matter or MOND, e.g. NGC 7507. The isolated elliptical NGC 5812 is another object to investigate a possible role of isolation. We use globular clusters (GCs) and the galaxy light itself as dynamical tracers to constrain its mass profile. We employ Gemini/GMOS mask spectroscopy, apply the GMOS reduction procedures provided within IRAF, measure GC velocities by cross correlation methods and extract the line-of-sight kinematics of galaxy spectra using the tool pPXF. We identify 28 GCs with an outermost galactocentric distance of 20 kpc, for which velocities could be obtained. Furthermore, 16 spectra of the integrated galaxy light out to 6 kpc have been used to model the central kinematics. These spectra provide evidence for a disturbed velocity field. We construct spherical Jeans models for the galaxy light and apply tracer mass estimators for the globular clusters. With the assumptions inherent to the mass estimators, MOND is compatible with the mass out to 20 kpc. However, a dark matter free galaxy is not excluded. We find one globular cluster with an estimated mass of 1.6x10**7 solar masses, the first Ultra Compact Dwarf in an isolated elliptical. We put NGC 5812 into the general context of dark matter or alternative ideas in elliptical galaxies. The case for a MONDian phenomenology also among early-type galaxies has become so strong that deviating cases appear astrophysically more interesting than agreements. The baryonic Tully Fisher relation (BTFR) as predicted by MOND is observed in some samples of early-type galaxies, in others not. However, in cases of galaxies that deviate from the MONDian prediction, data quality and data completeness are often problematic. (abridged)
description: 20 pages, 9 figures, to be published in Astronomische Nachrichten
Dynamics and Afterglow Light Curves of GRB Blast Waves with a Long-lived Reverse Shock
Creators: name: Uhm, Z. Lucas
name: Zhang, Bing
name: Hascoet, Romain
name: Daigne, Frederic
name: Mochkovitch, Robert
name: Park, Il H.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We perform a detailed study on the dynamics of a relativistic blast wave with the presence of a long-lived reverse shock (RS). Although a short-lived RS has been widely considered, the RS is believed to be long-lived as a consequence of a stratification expected on the ejecta Lorentz factors. The existence of a long-lived RS makes the forward shock (FS) dynamics to deviate from a self-similar Blandford-McKee solution. Employing the "mechanical model" that correctly incorporates the energy conservation, we present an accurate solution for both the FS and RS dynamics. We conduct a sophisticated calculation of the afterglow emission. Adopting a Lagrangian description of the blast wave, we keep track of an adiabatic evolution of numerous shells between the FS and RS. An evolution of the electron spectrum is also followed individually for every shell. We then find the FS and RS light curves by integrating over the entire FS and RS shocked regions, respectively. In particular, we make use of an analytic expression for observed spectral flux, which we derive here in terms of an observed frequency and observer time. Exploring a total of 20 different ejecta stratifications, we explain in detail how a stratified ejecta affects its blast wave dynamics and afterglow light curves. We show that, while the FS light curves are not sensitive to the ejecta stratifications, the RS light curves exhibit much richer features, including steep declines, plateaus, bumps, re-brightenings, and a variety of temporal decay indices. These distinctive RS features may be observable if the RS has higher values of the micophysics parameters than the FS. We discuss possible applications of our results in understanding the GRB afterglow data.
description: 54 pages, 27 figures, accepted for publication in ApJ
Cosmic R-string, R-tube and Vacuum Instability
Creators: name: Eto, Minoru
name: Hamada, Yuta
name: Kamada, Kohei
name: Kobayashi, Tatsuo
name: Ohashi, Keisuke
name: Ookouchi, Yutaka
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We show that a cosmic string associated with spontaneous $U(1)_R$ symmetry breaking gives a constraint for supersymmetric model building. In some models, the string can be viewed as a tube-like domain wall with a winding number interpolating a false vacuum and a true vacuum. Such string causes inhomogeneous decay of the false vacuum to the true vacuum via rapid expansion of the radius of the tube and hence its formation would be inconsistent with the present Universe. However, we demonstrate that there exist metastable solutions which do not expand rapidly. Furthermore, when the true vacua are degenerate, the structure inside the tube becomes involved. As an example, we show a "bamboo"-like solution, which suggests a possibility observing an information of true vacua from outside of the tube through the shape and the tension of the tube.
description: 28 pages, 17 figures, v2: references added, improved arguments in sec 3.5.2
Yelling to Listen and Other Paradoxes of American Pro se Small Claims Court
Creators: name: McCarthy, Jacob
Publisher: name: University of Chicago
Year: 2018
Subjects: subject: pro se small claims court
subject: justice system

description: While there is extensive scholarship on lower criminal courts, civil courts are often ignored in sociological discourse. I conducted an ethnographic study of a pro se small claims court in hopes of contributing to this limited scholarship. Drawing on existing sociological theories, and my own observation, I argue that these courts are the locus of a negotiation between democratic ideals and autocratic control. This negotiation is apparent in the architecture of the space, its rhetorical structure, and its judge’s relationship to the law.
Growing a Network on a Given Substrate
Creators: name: Fotouhi, Babak
name: Rabbat, Michael
Publisher: name: arXiv
Year: 2012
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Social and Information Networks (cs.SI)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Conventional studies of network growth models mainly look at the steady state degree distribution of the graph. Often long time behavior is considered, hence the initial condition is ignored. In this contribution, the time evolution of the degree distribution is the center of attention. We consider two specific growth models; incoming nodes with uniform and preferential attachment, and the degree distribution of the graph for arbitrary initial condition is obtained as a function of time. This allows us to characterize the transient behavior of the degree distribution, as well as to quantify the rate of convergence to the steady-state limit.
Militärische oder zivile Verwendung frühkaiserzeitlicher Pferdegeschirranhänger aus der Provinz Africa Proconsularis und den Nordwestprovinzen
Creators: name: Mackensen, Michael
Publisher: name: Germania : Anzeiger der Römisch-Germanischen Kommission des Deutschen Archäologischen Instituts
Year: 2019

description: -
description: Germania : Anzeiger der Römisch-Germanischen Kommission des Deutschen Archäologischen Instituts, Bd. 70 Nr. 2 (2001)
Measuring what Counts: The Implementation and Measurement of Social Emotional Learning in Chicago Public Schools
Creators: name: Lee, Jee Sun
Publisher: name: University of Chicago
Year: 2018
Subjects: subject: social emotional learning
subject: Chicago Public Schools

description: Over the last twenty years, there has been growing interest and research done in how to explicitly teaching children social and emotional skills in the school setting. While the benefits of social emotional learning (SEL) and the development of SEL programs has been thoroughly explored, the research into creating the measurement tools to determine the efficacy of these initiatives has been lagging behind. The purpose of this study was to get a better understanding of how Chicago Public Schools (CPS) has approached its implementation of SEL. Illinois is one of four states to have free-standing SEL standards for K-12, and CPS has increasingly invested resources into implementing SEL. However, the process for how the district is measuring its progress related to SEL is not as clear. Using a mixed methods approach, I use both interviews from those within CPS as well as publicly available school data in order to better understand how SEL operates on both the district and school level, what metrics are currently being used to measure progress, and whether or not some of these measures are valid metrics to be using.
Growth and anisotropy of ionization fronts near high redshift quasars in the MassiveBlack simulation
Creators: name: Feng, Yu
name: Croft, Rupert A. C.
name: Di Matteo, Tiziana
name: Khandai, Nishikanta
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We use radiative transfer to study the growth of ionized regions around the brightest, z=8 quasars in a large cosmological hydrodynamic simulation that includes black hole growth and feedback (the MassiveBlack simulation). We find that in the presence of the quasar s the comoving HII bubble radii reach 10 Mpc/h after 20 My while with the stellar component alone the HII bubbles are smaller by at least an order of magnitude. Our calculations show that several features are not captured within an analytical growth model of Stromgren spheres. The X-ray photons from hard quasar spectra drive a smooth transition from fully neutral to partially neutral in the ionization front. However the transition from partially neutral to fully ionized is significantly more complex. We measure the distance to the edge of bubbles as a function of angle and use the standard deviation of these distances as a diagnostic of the isotropy of ionized regions. We find that the overlapping of nearby ionized regions from clustered halos not only increases the anisotropy, but also is the main mechanism which allows the outer radius to grow. We therefore predict that quasar ionized bubbles at this early stage in the reionization process should be both significantly larger and more irregularly shaped than bubbles around star forming galaxies. Before the star formation rate increases and the Universe fully reionizes, quasar bubbles will form the most striking and recognizable features in 21cm maps.
description: 11 pages, 10 figures. Updated after referee report
title: Diversity of Population III Star Formation
Creators: name: Wollenberg, Katharina Margaretha Johanna
Publisher: name: Heidelberg University Library
Year: 2019

description: The aim of this thesis is to improve our understanding of the fragmentation behavior of Population III protostellar disks under the influence of rotation, turbulence, and magnetic fields. We further evaluate consequences that may be inferred for the later evolution of the star-forming halo and its surroundings with respect to protostellar ejections and in terms of the impact of radiative feedback on later chemical enrichment of neighboring halos.
In the main part of this thesis, we follow the collapse of a primordial gas cloud until the formation of the first protostar and the creation of a highly gravitationally unstable protostellar disk system. We find that turbulence promotes the fragmentation of the protostellar disk and both rotation and magnetic fields can provide some stabilization against it. While the total mass growth of the collection of protostars is only mildly affected by rotation and turbulence, magnetic fields can have such a strong impact on the dynamical evolution of the disk system that accretion onto the protostars is highly disturbed and their mass growth is significantly reduced. In spite of all the differences, the disk generally breaks up into a protostellar cluster that develops a top-heavy mass function. Interactions between protostars in the cluster are highly dynamical and lead to a considerable number of protostellar ejections. We demonstrate that some of these ejected Population III protostars, even if they continue to accrete for some longer period after they have left the disk environment, continue to have masses of M < 0.8 solar mass. Hence, they have lifetimes longer than the current age of the Universe and thus describe Population III candidates that could still be observable today.
In another project, we assess the role of photoevaporation of a pristine halo by a near-by Population III star prior to the supernova explosion of that star. We demonstrate that it is crucial for realistic simulations of metal enrichment to account for the photoevaporation as the radiation ablates and thins out the outer halo layers and thus makes the halo more susceptible to mixing with the metals from the supernova ejecta.
In this thesis, we use both analytical estimations and numerical simulations. Further tests are conducted to investigate the performance of our numerical methods and the sensitivity of our results to the numerical resolution. We demonstrate that general trends, in particular when effects of turbulence are examined, cannot be reliably deduced from only a single numerical run. Instead a statistical analysis of an ensemble of realizations based on the same initial conditions needs to be considered.
What Makes an Ideal Reparations Package?: A typological Examination of reparations for Jon Burge Torture Survivors
Creators: name: Anderson, Madeline
Publisher: name: University of Chicago
Year: 2018
Subjects: subject: reparations
subject: Jon Burge Torture Survivors

description: This paper explores the question “how effective was the Burge reparations package?” I define reparations and create a typology of reparations based on international and national case studies. I then use that, as well as interviews with torture survivors, the mothers of torture survivors, and the authors and implementers of the Burge reparations package, to judge the efficacy of the Burge reparations package and make recommendations about what work should still be done to improve the plight of torture survivors.
Prethermalization in one-dimensional Bose gases: description by a stochastic Ornstein-Uhlenbeck process
Creators: name: Langen, Tim
name: Gring, Michael
name: Kuhnert, Maximilian
name: Rauer, Bernhard
name: Geiger, Remi
name: Smith, David Adu
name: Mazets, Igor E.
name: Schmiedmayer, Jörg
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We experimentally study the relaxation dynamics of a coherently split one-dimensional Bose gas using matterwave interference. Measuring the full probability distributions of interference contrast reveals the prethermalization of the system to a non-thermal steady state. To describe the evolution of noise and correlations we develop a semiclassical effective description that allows us to model the dynamics as a stochastic Ornstein-Uhlenbeck process.
description: Submitted to EPJ Special Topics for the special issue on "Novel Quantum Phases and Mesoscopic Physics in Quantum Gases", Lyon BEC 2012
title: The use of English and German pattern books at the Garden Kingdom of Dessau-Wörlitz at the turn of the 19th century
Creators: name: Oschatz, Christoph
Publisher: name: Heidelberg University Library
Year: 2018

description: Diese Masterarbeit untersucht die Verwendung von englischen und deutschen Vorlagebüchern des ausgehenden 18. und angehenden 19. Jahrhunderts, sogenannten ´pattern books´, und deren Umsetzung im Gartenreich Dessau-Wörlitz in Deutschland anhand von drei Fallstudien. Die Gartenreich, heute anerkannt als UNESCO Weltkulturerbe, war maßgeblich beteiligt an der Einführung und Entwicklung des Englischen Landschaftsgartens, der klassizistischen und neo-gotischen Architektursprache aber auch des pädagogischen Ansatzes und der landwirtschaftlichen Nutzbarmachung von Gartenflächen in Deutschland und Mitteleuropa. Die ausgewählten Fallbeispiele sind kleinere Gartengebäude und ein Wohnhaus innerhalb der Gärten, deren Verhältnis zu Ihren jeweiligen ´pattern book´ Entwürfen noch wenig geklärt ist. Der Verfasser verdeutlicht, dass die Geschichte ihrer Entstehung wichtige Schlüsse über den britisch – deutschen Kulturaustausch auf dem Gebiet der Architekturtheorie und der Publikationspraxis zulässt, die eine Neubewertung ihrer historischen Bedeutung nach sich zieht. 

Der Verfasser hat eine Literaturrecherche zu den Themengebieten der Vorlagenbücher, der Publikationspraxis auf dem Gebiet des Architekturentwurfes und des Kulturaustausches zwischen Großbritannien und Deutschland vorgenommen. Zusätzlich wurden britische und deutsche Vorlagenbücher gesichtet und verglichen. Ergänzend wurden Sachverständige und Autoren der obengenannten Themengebiete persönlich konsultiert, sowie eine Anzahl von Gärten in beiden Ländern besucht. 

Als Forschungsergebnis dieser Arbeit kann gezeigt werden, dass jede Fallstudie unterschiedliche Aspekte eines Vorganges des Kopierens, der Übertragung, des Auslegens und Anpassens von architektonischen Ideen und deren Anwendung in gebauter Realität illuminiert. Interessante Einblicke konnten dabei auch in das Zeitverständnis von copyright und Urheberschaft gemacht werden. 

Anhand von Fallbeispiel 2 - dem sogenannten ´Schlangenhaus´ im Landschaftspark Luisium bei Dessau – eröffnet sich schließlich die Möglichkeit, dass sein gebauter Entwurf Eingang in ein späteres britisches Vorlagenbuch gefunden haben könnte. Dies würde die vorherrschende Richtung des Kulturaustausches zwischen beiden Ländern auf diesen Gebiet umkehren. Als wichtige weitere Forschungsempfehlung muss deswegen das Baudatum des Schlangenhauses eindeutig geklärt werden. Gleichwohl konnte der Verfasser eine Reihe von Persönlichkeiten, persönlichen und kommerziellen Beziehungen aufzeigen, die ´Mittel, Motiv und Gelegenheit´ boten, um den Entwurf des Schlangenhauses Einzug in ein englisches Vorlagenbuch finden zu lassen; eine faszinierende Aussicht. 

Die historische Bedeutung der Fallstudien liegt unter anderem in dem Umstand, wie tief eingebettet sie in die Architekturdiskussion, das Architekturverständnis und den Austausch von Ideen in Europa um 1800 eingebettet waren.
Polyhedral Object Recognition by Indexing
Creators: name: Horaud, Radu
name: Sossa, Humberto
Publisher: name: arXiv
Year: 2023
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: In computer vision, the indexing problem is the problem of recognizing a few objects in a large database of objects while avoiding the help of the classical image-feature-to-object-feature matching paradigm. In this paper we address the problem of recognizing 3-D polyhedral objects from 2-D images by indexing. Both the objects to be recognized and the images are represented by weighted graphs. The indexing problem is therefore the problem of determining whether a graph extracted from the image is present or absent in a database of model graphs. We introduce a novel method for performing this graph indexing process which is based both on polynomial characterization of binary and weighted graphs and on hashing. We describe in detail this polynomial characterization and then we show how it can be used in the context of polyhedral object recognition. Next we describe a practical recognition-by-indexing system that includes the organization of the database, the representation of polyhedral objects in terms of 2-D characteristic views, the representation of this views in terms of weighted graphs, and the associated image processing. Finally, some experimental results allow the evaluation of the system performance.
Andreas Rau (Herausgeber), Nydam Mose. Die Schiffe
Creators: name: Hemanns, Marcus Heinrich
Publisher: name: Bonner Jahrbücher
Year: 2019

description: Rezension zu: Andreas Rau (Herausgeber), Nydam Mose. Die Schiffe.
Jernalderen i Nordeuropa. Jysk Arkæologist Selskabs
Skrifter, Band 72. Verlag der Universität Aarhus,
Højbjerg 2013. – Teil III: Flemming Rieck, Katalog.
Konkordanz. Tafeln. Pläne. 250 Seiten, 92 Tafeln,
62 Pläne. – Teil IV: Flemming Rieck, Ole Magnus,
Morten Gøthche, Ronald Bockius, Rainer Grabert,
Ronja Mücke, Andreas Rau und Angelika Abegg-
Wigg, Beiträge zu Form, Technik und Historie. 378
Seiten, 8 Beilagen.
description: Bonner Jahrbücher, Bd. 214.2014(2015): Bonner Jahrbücher
D-GATE: Decentralized Geolocation and Time Enforcement for Usage Control
Creators: name: Felde, Hendrik Meyer zum
name: Reding, Jean-Luc
name: Lux, Michael
Publisher: name: arXiv
Year: 2023
Subjects: subject: Cryptography and Security (cs.CR)
subject: FOS: Computer and information sciences

description: In the context of cloud environments, data providers entrust their data to data consumers in order to allow further computing on their own IT infrastructure. Usage control measures allow the data provider to restrict the usage of its data even on the data consumer's system. Two of these restrictions can be the geographic location and time limitations. Current solutions that could be used to enforce such constraints can be easily manipulated. These include solutions based on the system time, organizational agreements, GPS-based techniques or simple delay measurements to derive the distance to known reference servers. With D-GATE, we propose a reliable solution that uses trusted execution environments and relies on a decentralized mesh of reference nodes, so-called GeoClients. Here, participants periodically measure the lowest network delay to each other to geolocate themselves. For data providers, it is thus possible to technically attest usage control with time and geolocation constraints without depending on centralized reference systems.
Leveraging a National Big Data Source to Measure Cost and Affordability Gaps between Current and Healthy Diets: an analysis for Argentina during the Pandemic Year
Creators: name: Cámara, Florencia
name: Castronuovo, Luciana
name: Tiscornia, Victoria
name: Guarnieri, Leila
name: Pizarro, Maria Elisabet
Publisher: name: Zenodo
Year: 2021
Subjects: Current diet; Healthy diet; Obesity; Cost; Affordability

description: Slides and updated extended abstract
Apparent versus true value of the cosmological constant
Creators: name: Romano, Antonio Enea
name: chen, Pisin
Publisher: name: arXiv
Year: 2012
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Supernovae observations strongly support the presence of a cosmological constant, but its value, which we will call apparent, is normally determined assuming that the universe can be accurately described by a homogeneous model. Even in the presence of a cosmological constant we cannot exclude nevertheless the presence of a small local inhomogeneity which could affect the apparent value of the cosmological constant. Neglecting the presence of the inhomogeneity can in fact introduce a systematic misinterpretation of cosmological data, leading to the distinction between an apparent and the true value of the cosmological constant. But is such a difference distinguishable? Recently we set out to model the local inhomogeneity with a ΛLTB solution and computed the relation between the apparent and the true value of the cosmological constant. In this essay we reproduce the essence of our model with the emphasis on its physical implications.
description: Some parts need to be revised
Visually Guided Object Grasping
Creators: name: Horaud, Radu
name: Dornaika, Fadi
name: Espiau, Bernard
Publisher: name: arXiv
Year: 2023
Subjects: subject: Robotics (cs.RO)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: In this paper we present a visual servoing approach to the problem of object grasping and more generally, to the problem of aligning an end-effector with an object. First we extend the method proposed by Espiau et al. [1] to the case of a camera which is not mounted onto the robot being controlled and we stress the importance of the real-time estimation of the image Jacobian. Second, we show how to represent a grasp or more generally, an alignment between two solids in 3-D projective space using an uncalibrated stereo rig. Such a 3-D projective representation is view-invariant in the sense that it can be easily mapped into an image set-point without any knowledge about the camera parameters. Third, we perform an analysis of the performances of the visual servoing algorithm and of the grasping precision that can be expected from this type of approach.
Axinella Schmidt 1862
Creators: name: Trejo, Alejandra
name: Carballo, José Luis
name: Segovia, Johanna
Publisher: name: Zenodo
Year: 2025
Subjects: Biodiversity
Taxonomy
Animalia
Porifera
Demospongiae
Axinellida
Axinellidae
Axinella

description: Genus Axinella Schmidt, 1862
Definition. Axinellidae with axial and extra-axial differentiation in the choanosomal skeleton. Megascleres are styles and oxeas. Microscleres are microraphides and trichodragmata, if present (Alvarez & Hooper 2002).
description: Published as part of Trejo, Alejandra, Carballo, José Luis & Segovia, Johanna, 2025, New records and checklist of sponges from El Salvador (Eastern Tropical Pacific), pp. 99-125 in Zootaxa 5613 (1) on page 104, DOI: 10.11646/zootaxa.5613.1.4, http://zenodo.org/record/15216236
Interference of resonances and observation of the Θ^{+}-pentaquark
Creators: name: Azimov, Ya.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: Nuclear Experiment (nucl-ex)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: After brief discussion of how the quantum interference may influence manifestations of resonances, description is given of the recent experimental evidence for possible manifestation of the Θ^{+}-photoproduction in interference with the ϕ-photoproduction.
description: 7 pages, 1 figure, LATEX, uses hsqcd.cls (included); presented at the International Workshop HSQCD 2012, St.Petersburg, Russia, 4--8 July, 2012; to appear in the Proceedings
The Yield-Strain in Shear Banding Amorphous Solids
Creators: name: Dasgupta, Ratul
name: Hentschel, H. George E.
name: Procaccia, Itamar
Publisher: name: arXiv
Year: 2012
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: In recent research it was found that the fundamental shear-localizing instability of amorphous solids under external strain, which eventually results in a shear band and failure, consists of a highly correlated array of Eshelby quadrupoles all having the same orientation and some density $ρ$. In this paper we calculate analytically the energy $E(ρ,γ)$ associated with such highly correlated structures as a function of the density $ρ$ and the external strain $γ$. We show that for strains smaller than a characteristic strain $γ_Y$ the total strain energy initially increases as the quadrupole density increases, but that for strains larger than $γ_Y$ the energy monotonically decreases with quadrupole density. We identify $γ_Y$ as the yield strain. Its value, derived from values of the qudrupole strength based on the atomistic model, agrees with that from the computed stress-strain curves and broadly with experimental results.
description: arXiv admin note: text overlap with arXiv:1207.3591
title: Modelling water availability and water allocation strategies in the Scheldt basin: sub report 4-2. Developing a rainfall-runoff model of the Meuse – NAM Meuse
Creators: name: Maroy, E.
name: Michielsen, Stef
name: Velez, Carlos
name: Pereira, Fernando
name: Nossent, Jiri
name: Mostaert, Frank
Publisher: name: Flanders Hydraulics Research
Year: 2021

description: In order to correctly simulate the water availability in the Albert Canal and the Campine Canals, it is important to correctly simulate the flow in the Meuse river. The river is the source for this vast canal system. If it is possible to simulate the hydrology of the Meuse basin, it will be possible to model the water balance of the canal system for a period of over 40 years. The modelling has been done using the NAM software (©DHI).The Meuse catchment is split up in 11 sub catchments. One big catchment of the Meuse itself upstream from Profondeville, 7 catchments of different scale of the tributaries downstream of Profondeville and 3 smaller catchments representing the ungauged area downstream Profondeville. Except for the catchment upstream from Profondeville, the catchments are calibrated separately to find an optimal parameter set. To assess the parameters for modelling the upstream catchment, the latter was split in 5 sub catchments which were calibrated separately. However, for the purpose of the water availability modelling of the Albert Canal and Campine canals, the area upstream from Profondeville is simulated by using the parameters of the biggest sub catchment (i.e. the French part of the Meuse catchment).The optimization during calibration is performed based on an automatic procedure, followed by a visual control. During the optimization routine the parameter sets are selected based on 2 criteria: (1) absolute error on cumulated total flow at each time step, and (2) logarithmic Nash-Sutcliff efficiency. The first criterion aims to model the global flow pattern, the latter focuses mainly on the low flows. In general the simulation of the hydrology of the Meuse catchment gives fairly good results bearing in mind that it is used for simulations on a regional scale.
description: Title : FHR reports. Flanders Hydraulics Research: Antwerp Volume : 00_162_4-2 Issue : Pagination : X, 36 + 78 p. app.
Steric sea-level trends in the Argo epoch: First results from an integrated, spatial sea-level budget assessment
Creators: name: Sha, Zhe
name: Royston, Sam
name: Bamber, Jonathan L
name: Rougier, Jonty
name: Bingham, Rory
name: Llovel, William
name: Schumacher, Maike
Publisher: name: Zenodo
Year: 2018

description: Presentation at Sea Level Futures Conference, Liverpool 2–4 July 2018
Migration in a Small World: A Network Approach to Modeling Immigration Processes
Creators: name: Fotouhi, Babak
name: Rabbat, Michael G.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Social and Information Networks (cs.SI)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Existing theories of migration either focus on micro- or macroscopic behavior of populations; that is, either the average behavior of entire population is modeled directly, or decisions of individuals are modeled directly. In this work, we seek to bridge these two perspectives by modeling individual agents decisions to migrate while accounting for the social network structure that binds individuals into a population. Pecuniary considerations combined with the decisions of peers are the primary elements of the model, being the main driving forces of migration. People of the home country are modeled as nodes on a small-world network. A dichotomous state is associated with each node, indicating whether it emigrates to the destination country or it stays in the home country. We characterize the emigration rate in terms of the relative welfare and population of the home and destination countries. The time evolution and the steady-state fraction of emigrants are also derived.
BundleMoCap: Efficient, Robust and Smooth Motion Capture from Sparse Multiview Videos
Creators: name: Albanis, Georgios
name: Zioulis, Nikolaos
name: Kolomvatsos, Kostas
Publisher: name: arXiv
Year: 2023
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Graphics (cs.GR)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Capturing smooth motions from videos using markerless techniques typically involves complex processes such as temporal constraints, multiple stages with data-driven regression and optimization, and bundle solving over temporal windows. These processes can be inefficient and require tuning multiple objectives across stages. In contrast, BundleMoCap introduces a novel and efficient approach to this problem. It solves the motion capture task in a single stage, eliminating the need for temporal smoothness objectives while still delivering smooth motions. BundleMoCap outperforms the state-of-the-art without increasing complexity. The key concept behind BundleMoCap is manifold interpolation between latent keyframes. By relying on a local manifold smoothness assumption, we can efficiently solve a bundle of frames using a single code. Additionally, the method can be implemented as a sliding window optimization and requires only the first frame to be properly initialized, reducing the overall computational burden. BundleMoCap's strength lies in its ability to achieve high-quality motion capture results with simplicity and efficiency. More details can be found at https://moverseai.github.io/bundle/.
description: Published in European Conference on Visual Media Production (CVMP '23)
A nova origin of the gas cloud at the Galactic Center ?
Creators: name: Meyer, F.
name: Meyer-Hofmeister, E.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The recent discovery by Gillessen and collaborators of a cloud of gas falling towards the Galactic Center on a highly eccentric orbit, diving nearly straight into the immediate neighborhood of the central supermassive black hole, raises the important question of its origin. Several models have already been proposed. Here we suggest that a recent nova outburst has ejected a ring-like shell of gas. Viewed at high inclination, that could account for the mass, head and tail structure, and the unusually high eccentricity of the observed cloud in a natural way, even as the nova moves on an orbit quite normal for the young stars in the close neighborhood of the Galactic Center. We illustrate this by calculating orbits for the head and tail parts of the ejecta and the nova that has produced it. We briefly discuss some of the questions that this model, if true, raises about the stellar environment close to the Galactic Center.
description: 4 pages, 1 figure, Journal reference, correction of a minor error
Equivariant Perturbation in Gomory and Johnson's Infinite Group Problem. II. The Unimodular Two-Dimensional Case
Creators: name: Basu, Amitabh
name: Hildebrand, Robert
name: Köppe, Matthias
Publisher: name: arXiv
Year: 2012
Subjects: subject: Optimization and Control (math.OC)
subject: Discrete Mathematics (cs.DM)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences

description: We give an algorithm for testing the extremality of a large class of minimal valid functions for the two-dimensional infinite group problem.
description: 23 pages. arXiv admin note: text overlap with arXiv:1206.2079
Effect of turbulent density-fluctuations on wave-particle interactions and solar flare X-ray spectra
Creators: name: Hannah, I. G.
name: Kontar, E. P.
name: Reid, H. A. S.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: The aim of this paper is to demonstrate the effect of turbulent background density fluctuations on flare-accelerated electron transport in the solar corona. Using the quasi-linear approximation, we numerically simulated the propagation of a beam of accelerated electrons from the solar corona to the chromosphere, including the self-consistent response of the inhomogeneous background plasma in the form of Langmuir waves. We calculated the X-ray spectrum from these simulations using the bremsstrahlung cross-section and fitted the footpoint spectrum using the collisional "thick-target" model, a standard approach adopted in observational studies. We find that the interaction of the Langmuir waves with the background electron density gradient shifts the waves to a higher phase velocity where they then resonate with higher velocity electrons. The consequence is that some of the electrons are shifted to higher energies, producing more high-energy X-rays than expected if the density inhomogeneity is not considered. We find that the level of energy gain is strongly dependent on the initial electron beam density at higher energy and the magnitude of the density gradient in the background plasma. The most significant gains are for steep (soft) spectra that initially had few electrons at higher energies. If the X-ray spectrum of the simulated footpoint emission are fitted with the standard "thick-target" model (as is routinely done with RHESSI observations) some simulation scenarios produce more than an order-of-magnitude overestimate of the number of electrons $>50$keV in the source coronal distribution.
description: Accepted by A&A
Black holes with non-minimal derivative coupling
Creators: name: Rinaldi, Massimiliano
Publisher: name: arXiv
Year: 2012
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study the gravitational field equations in the presence of a coupling between the derivative of a massless scalar field and the Einstein tensor. This configuration is motivated by Galileon gravity as it preserves shift invariance in the scalar sector. We analytically obtain solutions with static and spherically symmetric geometry, which also include black holes with a single regular horizon. We examine the thermodynamical properties of these solutions, and we reveal the non-perturbative nature of the Galileon coupling constant. We also find a phase transition, similar to the one described by Hawking and Page, which occurs at a critical temperature determined by both the black hole mass and by the strength of the coupling.
description: Matches the published version
Direction dependency of extraordinary refraction index in uniaxial nematic liquid crystals
Creators: name: Pavlin, Jerneja
name: Vaupotic, Natasa
name: Cepic, Mojca
Publisher: name: arXiv
Year: 2012
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Physics Education (physics.ed-ph)
subject: FOS: Physical sciences

description: The article presents a straightforward experiment that directly and illustratively demonstrates double refraction. For this purpose, two liquid crystalline cells were designed, which enable qualitative and quantitative measurements of the extraordinary refractive index direction dependency in a uniaxial nematic liquid crystal.
description: 20 pages, 8 figures, resubmitted
The thermal state of molecular clouds in the Galactic Center: evidence for non-photon-driven heating
Creators: name: Ao, Y.
name: Henkel, C.
name: Menten, K. M.
name: Requena-Torres, M. A.
name: Stanke, T.
name: Mauersberger, R.
name: Aalto, S.
name: Muehle, S.
name: Mangum, J.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We used the Atacama Pathfinder Experiment (APEX) 12 m telescope to observe the J_KaKc=3_03-2_02, 3_22-2_21, and 3_21-2_20 transitions of para-H_2CO at 218 GHz simultaneously to determine kinetic temperatures of the dense gas in the central molecular zone (CMZ) of our Galaxy. The map extends over approximately 40 arcmin x 8 arcmin (~100x20 pc^2) along the Galactic plane with a linear resolution of 1.2 pc. The strongest of the three lines, the H_2CO (3_03-2_02) transition, is found to be widespread, and its emission shows a spatial distribution similar to ammonia. The relative abundance of para-H_2CO is 0.5-1.2 10^{-9}, which is consistent with results from lower frequency H_2CO absorption lines. Derived gas kinetic temperatures for individual molecular clouds range from 50 K to values in excess of 100 K. While a systematic trend toward (decreasing) kinetic temperature versus (increasing) angular distance from the Galactic center (GC) is not found, the clouds with highest temperature (T_kin > 100 K) are all located near the nucleus. For the molecular gas outside the dense clouds, the average kinetic temperature is 65+/-10 K. The high temperatures of molecular clouds on large scales in the GC region may be driven by turbulent energy dissipation and/or cosmic-rays instead of photons. Such a non-photon-driven thermal state of the molecular gas provides an excellent template for the more distant vigorous starbursts found in ultraluminous infrared galaxies (ULIRGs).
description: 23 pages, 11 figures, A&A in press
Gamma-Z box corrections to weak charges of heavy nuclei in atomic parity violation
Creators: name: Blunden, P. G.
name: Melnitchouk, W.
name: Thomas, A. W.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We present a new dispersive formulation of the gamma-Z box radiative corrections to weak charges of bound protons and neutrons in atomic parity violation (APV) measurements on heavy nuclei such as 133-Cs and 213-Ra. We evaluate for the first time a small but important additional correction arising from Pauli blocking of nucleons in a heavy nucleus. Overall, we find a significant shift in the gamma-Z correction to the weak charge of 133-Cs, approximately 4 times larger than the current uncertainty on the value of sin^2(theta_W), but with a reduced error compared to earlier estimates.
description: 4 pages
Green screen as an index for seeing (how to be green)
Creators: name: Phung, An-Binh
Publisher: name: The University of Texas at Austin
Year: 2020
Subjects: Green screen
Chroma key
Depression

description: An introduction to the history and usage of green screen in film and other forms of media culture and a descriptions of works made by An-Binh Thi Phung in conjunction with this research. The special effect is analyzed in relationship to philosophical concepts such as the gaze and a the supermodern “non-place” to formulate a system of representing identity.
Hearing as seeing : investigating the relationship between what we see and what we hear
Creators: name: Goodman, Tucker Murray
name: 0000-0001-9109-7714
Publisher: name: The University of Texas at Austin
Year: 2020
Subjects: Hearing
Seeing
Music
Language
Story
Cross-modal perception
Semiotics
Theatre design
Scenic design
Set design
Collaboration

description: This paper focuses on the relationship between auditory and visual elements, exploring the way in which intentional incorporation of music influences visual artists and designers’ practice. Theatrical design programs teach students how to read a text and interpret the story told by the words on the page. The words may communicate much of the story, but by the time the production reaches the audience, many other elements join in: scenery, costumes, lighting, media, and sound. If these elements do not work together, they can create a cacophony instead of clarifying the narrative. Rather than competing with the words, visual and auditory elements should work together to tell the story cohesively. Inspired by the nebulous relationship between sight and sound, I researched historical, scientific, and artistic interpretations of this relationship. The information I gathered, presented in context with my personal reflections on the use of music as inspiration for visual design, led to the creation of a thesis in two parts: an art exhibition within a reflexive research project. The art exhibition, titled “Hearing As Seeing,” investigates the question, “What is the relationship between what we see and what we hear?” The research project employs action research by inviting the artists and designers who participated in the exhibition to investigate the question, “How might the intentional incorporation of music affect the process of creating visual art?”
Die Ausgegrenzten. Wie die Gesellschaft sich mit der sozialen Spaltung und Massenarmut abfindet, Kirche und Diakonie das aber nicht dürfen
Creators: name: Benedict, Hans-Jürgen
Publisher: name: DWI-Jahrbuch – Diakoniewissenschaft in Forschung und Lehre
Year: 2018

description: -
description: DWI-Jahrbuch – Diakoniewissenschaft in Forschung und Lehre, Bd. 43: (2013): Diakoniewissenschaft in Forschung und Lehre
Theologie und Praxis der Diakonie im Lebenswerk von John Wesley in Beziehung zum Werk Nikolaus Ludwig von Zinzendorfs – ihre Bedeutung für den neuen diakonischen Aufbau der Korean Methodist Church (KMC)
Creators: name: Kap Park, In
Publisher: name: DWI-Jahrbuch – Diakoniewissenschaft in Forschung und Lehre
Year: 2018

description: -
description: DWI-Jahrbuch – Diakoniewissenschaft in Forschung und Lehre, Bd. 43: (2013): Diakoniewissenschaft in Forschung und Lehre
title: Modelling water availability and water allocation strategies in the Scheldt basin: Sub report 4-5. Analyses of hydrological models for climate change modelling – WETSPA
Creators: name: Lam, Q.D.
name: Maroy, E.
name: Pereira, Fernando
name: Nossent, Jiri
name: Mostaert, Frank
Publisher: name: Flanders Hydraulics Research
Year: 2021

description: The water balance model of the Scheldt basin will be used in order to perform low flow forecasts and calculate climate change scenarios. Within the current subtask is investigated which is the most appropriate hydrological model for the sub catchments of the water balance model of the Scheldt basin in order to meet this prerequisite. This sub report describes the evaluation of WETSPA models (Water and energy transfer between Soil plant and atmosphere, Salvadore, E. et al., 2012, 2021).Hydrological models with WETSPA are developed for the sub catchments included in the water balance model (including the Meuse basin). To assess the water availability and the flow behavior, each catchment was calibrated manually to find an optimal parameter set. The optimization during calibration is performed based on an automatic procedure followed by a visual control. During the optimization routine the parameters set is selected based on 2 criteria: (1) absolute error on cumulated total flow at each time step, and (2) logarithmic Nash-Sutcliff efficiency. The first criterion aims to model the global flow pattern, the latter focuses mainly on the low flows.In general the simulation of the hydrology of the Scheldt and the Meuse basin gives from reasonable to fairly good results and by consequence the developed hydrological models could be used to predict the future water availability under climate change.
description: Title : FHR reports. Flanders Hydraulics Research: Antwerp Volume : 00_162_4-5 Issue : Pagination : X, 93 + 714 p. app.
Das unternehmerische Selbstverständnis in der Diakonie vor dem Hintergrund europäischer Entwicklungen. Überlegungen zum Sozialunternehmertum und sozialen Innovationen
Creators: name: Eurich, Johannes
Publisher: name: DWI-Jahrbuch – Diakoniewissenschaft in Forschung und Lehre
Year: 2018

description: -
description: DWI-Jahrbuch – Diakoniewissenschaft in Forschung und Lehre, Bd. 44: (2014/2015): Diakoniewissenschaft in Forschung und Lehre