cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Evidence for a Spectroscopic Sequence Among SNe Ia
Creators: name: Nugent, Peter
name: Phillips, Mark
name: Baron, E.
name: Branch, David
name: Hauschildt, Peter
Publisher: name: arXiv
Year: 1995
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: In this Letter we present evidence for a spectral sequence among Type Ia supernovae (SNe Ia). The sequence is based on the systematic variation of several features seen in the near-maximum light spectrum. This sequence is analogous to the recently noted photometric sequence among SNe Ia which shows a relationship between the peak brightness of a SN Ia and the shape of its light curve. In addition to the observational evidence we present a partial theoretical explanation for the sequence. This has been achieved by producing a series of non-LTE synthetic spectra in which only the effective temperature is varied. The synthetic sequence nicely reproduces most of the differences seen in the observed one and presumably corresponds to the amount of 56Ni produced in the explosion.
description: To appear in Astrophysical Journal Letters, uuencoded, gzipped postscript file, also available from http://www.nhn.uoknor.edu/~baron/
The impacts of habitat loss and fragmentation upon the maintenance of biodiversity in tropical ecosystems
Creators: name: Hatfield, Jack Henry
Publisher: name: Imperial College London
Year: 2018

description: Habitat loss and fragmentation are major threats to biodiversity on a global scale. Human modified landscapes now comprise large areas of the globe, heavily contributing to the observed decline in biodiversity. By understanding the processes governing species communities in these fragmented landscapes we may be better able to manage them in a way that provides conservation benefits. The first part of this thesis focuses on dispersal in complex landscapes with Chapter 2 taking a regional view, examining connectivity across the whole Brazilian Atlantic Forest from a functional perspective and Chapter 3 investigating movement within local landscapes. We found that from the perspective of its fauna the Brazilian Atlantic Forest is functionally fragmented, with few areas remaining that are able to support large populations. At the local scale species exhibited clear threshold responses to changing forest cover with dispersal ability and home range size important determinants. The second part analyses bird diversity patterns across fragmented landscapes. Chapter 4 looks at alpha-diversity and composition, considering different land-uses and habitat types across a fragmentation gradient. Chapter 5 examines beta-diversity within habitats as well as between habitat types and landscapes. Bird community composition was found to differ between land use types as well as between habitats. Plantation forest matrices were able to mitigate isolation and area effects, retaining forest species. Beta-diversity within habitats was found to remain constant, whereas between habitat beta-diversity was high when comparing contrasting habitats. Turnover between habitat types is able to offset decreases in alpha-diversity, contributing to the maintenance of gamma-diversity. At the landscape level dissimilarity patterns were heavily governed by forest cover, suggesting a range of habitat amounts are needed to preserve the full bird community. Overall, although habitat loss and fragmentation are highly detrimental for biodiversity, mitigation via management changes are possible.
Effects of Large-Scale Convection on p-mode Frequencies
Creators: name: Swisdak, M.
name: Zweibel, E.
Publisher: name: arXiv
Year: 1998
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We describe an approach for finding the eigenfrequencies of solar acoustic modes (p modes) in a convective envelope in the WKB limit. This approximation restricts us to examining the effects of fluid motions which are large compared to the mode wavelength, but allows us to treat the three-dimensional mode as a localized ray. The method of adiabatic switching is then used to investigate the frequency shifts resulting from simple perturbations to a polytropic model of the convection zone as well as from two basic models of a convective cell. We find that although solely depth-dependent perturbations can give frequency shifts which are first order in the strength of the perturbation, models of convective cells generate downward frequency shifts which are second order in the perturbation strength. These results may have implications for resolving the differences between eigenfrequencies derived from solar models and those found from helioseismic observations.
description: 27 pages + 6 figures; accepted for publication in ApJ
Force Generation by Parallel Combinations of Fiber-Reinforced Fluid-Driven Actuators
Creators: name: Bruder, Daniel
name: Sedal, Audrey
name: Vasudevan, Ram
name: Remy, C. David
Publisher: name: arXiv
Year: 2018
Subjects: subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: The compliant structure of soft robotic systems enables a variety of novel capabilities in comparison to traditional rigid-bodied robots. A subclass of soft fluid-driven actuators known as fiber reinforced elastomeric enclosures (FREEs) is particularly well suited as actuators for these types of systems. FREEs are inherently soft and can impart spatial forces without imposing a rigid structure. Furthermore, they can be configured to produce a large variety of force and moment combinations. In this paper we explore the potential of combining multiple differently configured FREEs in parallel to achieve fully controllable multi-dimensional soft actuation. To this end, we propose a novel methodology to represent and calculate the generalized forces generated by soft actuators as a function of their internal pressure. This methodology relies on the notion of a state dependent fluid Jacobian that yields a linear expression for force. We employ this concept to construct the set of all possible forces that can be generated by a soft system in a given state. This force zonotope can be used to inform the design and control of parallel combinations of soft actuators. The approach is verified experimentally with the parallel combination of three carefully designed actuators constrained to a 2DOF testing rig. The force predictions matched measured values with a root-mean-square error of less than 1.5 N force and 8 x 10^(-3)Nm moment, demonstrating the utility of the presented methodology.
description: Published in IEEE Robotics and Automation Letters
Ramphastos Linnaeus, 1758, gen. nov.
Creators: name: Linnaeus, Carolus
Publisher: name: Laurentius Salvius
Year: 1758
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Aves
Piciformes
Ramphastidae
Ramphastos

description: Ramphastos [gen. nov.]
Rostrum maximum, inane, convexum, extrorsum serratum.
Nares pone maxillas.
Lingua pennacea.
Pedum digiti antici posticique gemini.
description: Published as part of Linnaeus, Carolus, 1758, Systema Naturae per regna tria naturae: secundum classes, ordines, genera, species, cum characteribus, differentiis, synonymis, locis, Stockholm :Laurentius Salvius on page 103, DOI: 10.5962/bhl.title.542, http://zenodo.org/record/3922206
Spectral Properties of Accretion Disks Around Galactic and Extragalactic Black Holes
Creators: name: Chakrabarti, Sandip K.
name: Titarchuk, Lev G.
Publisher: name: arXiv
Year: 1995
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We study the spectral properties of a very general class of accretion disks which can be decomposed into three distinct components apart from a shock at $r=r_s$: (1) An optically thick Keplerian disk on the equatorial plane ($r>r_s$), (2) A sub-Keplerian optically thin halo above and below this Keplerian disk $r>r_s$ and (3) A hot, optically slim, $τ\sim 1$ postshock region $r
description: 45 pages of Latex file + 10 figures (Misprints in Description and Caption of Figure 2 are corrected)
MPEC 2025-D174 : 2025 DV6
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2025
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469
subject: 2025 DV6

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Significant Excess of ElectronLike Events in the MiniBooNE Short-Baseline Neutrino Experiment
Creators: name: MiniBooNE Collaboration
name: Aguilar-Arevalo, A. A.
name: Brown, B. C.
name: Bugel, L.
name: Cheng, G.
name: Conrad, J. M.
name: Cooper, R. L.
name: Dharmapalan, R.
name: Diaz, A.
name: Djurcic, Z.
name: Finley, D. A.
name: Ford, R.
name: Garcia, F. G.
name: Garvey, G. T.
name: Grange, J.
name: Huang, E. -C.
name: Huelsnitz, W.
name: Ignarra, C.
name: Johnson, R. A.
name: Karagiorgi, G.
name: Katori, T.
name: Kobilarcik, T.
name: Louis, W. C.
name: Mariani, C.
name: Marsh, W.
name: Mills, G. B.
name: Mirabal, J.
name: Monroe, J.
name: Moore, C. D.
name: Mousseau, J.
name: Nienaber, P.
name: Nowak, J.
name: Osmanov, B.
name: Pavlovic, Z.
name: Perevalov, D.
name: Ray, H.
name: Roe, B. P.
name: Russell, A. D.
name: Shaevitz, M. H.
name: Spitz, J.
name: Stancu, I.
name: Tayloe, R.
name: Thornton, R. T.
name: Tzanov, M.
name: Van de Water, R. G.
name: White, D. H.
name: Wickremasinghe, D. A.
name: Zimmerman, E. D.
Publisher: name: arXiv
Year: 2018
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The MiniBooNE experiment at Fermilab reports results from an analysis of $ν_e$ appearance data from $12.84 \times 10^{20}$ protons on target in neutrino mode, an increase of approximately a factor of two over previously reported results. A $ν_e$ charged-current quasielastic event excess of $381.2 \pm 85.2$ events ($4.5 σ$) is observed in the energy range $200
description: Improved some of the figures and improved the correlation between neutrino and antineutrino data
SET-PAiREd: Designing for Parental Involvement in Learning with an AI-Assisted Educational Robot
Creators: name: Ho, Hui-Ru
name: Kargeti, Nitigya
name: Liu, Ziqi
name: Mutlu, Bilge
Publisher: name: arXiv
Year: 2025
Subjects: subject: Robotics (cs.RO)
subject: Human-Computer Interaction (cs.HC)
subject: FOS: Computer and information sciences

description: AI-assisted learning companion robots are increasingly used in early education. Many parents express concerns about content appropriateness, while they also value how AI and robots could supplement their limited skill, time, and energy to support their children's learning. We designed a card-based kit, SET, to systematically capture scenarios that have different extents of parental involvement. We developed a prototype interface, PAiREd, with a learning companion robot to deliver LLM-generated educational content that can be reviewed and revised by parents. Parents can flexibly adjust their involvement in the activity by determining what they want the robot to help with. We conducted an in-home field study involving 20 families with children aged 3-5. Our work contributes to an empirical understanding of the level of support parents with different expectations may need from AI and robots and a prototype that demonstrates an innovative interaction paradigm for flexibly including parents in supporting their children.
Navigating a Third Space to Support International Students in the U.S.
Creators: name: Aziz, Jurana
Publisher: name: Texas Education Review
Year: 2023
Subjects: Bhabha’s third space
international graduate students
cultural differences
teacher instruction

description: The present article explores the experiences of two international graduate students who studied in the United States and how they dealt with the challenges of living in a new country. The researcher was inspired by Bhabha's (1994) third space theory and aimed to investigate how these students tried to create a space for themselves in the classroom to overcome cultural differences. The data has been collected through in-depth interviews and analyzed using Gee's (2011) discourse analysis method. The study concluded that providing international students with a designated space in the classroom to address their cultural challenges could greatly benefit them, and teachers can actively facilitate this space.
title: ADCO, Cartulaire de Cîteaux pour la grange et seigneurie d'Ouges (XVe siècle), Cart. 173 (11 H 939), 226 folios, f. 0138
Creators: name: de la Côte d'Or, Archives départementales
name: Archives Départementales De La Côte-D'Or
name: Petot, Frédérique
name: Projet CBMA
name: CG21/F.PETOT/2015
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2020
Subjects: subject: Laboratoire de Médiévistique Occidentale de Paris
subject: cartulaire
subject: Corpus Burgundiae Medii Aevi
subject: Chartes de la Bourgogne du Moyen Âge
subject: LaMOP

description: Cartulaire de Cîteaux pour la grange et seigneurie d'Ouges (XVe siècle), Archives départementales de la Côte-d'Or, Cart. 173 (11 H 939), 226 folios, f. 0138, Numérisation en mode image.
description: Relation: http://www.cbma-project.eu/
description: Bibliographic citation: Cartulaire de Cîteaux pour la grange et seigneurie d'Ouges (XVe siècle), Archives départementales de la Côte-d'Or, Cart. 173 (11 H 939), 226 folios, f. 0138, in Projet CBMA - Corpus Burgundiae Medii Aevi [Ressource en ligne], https:// manuscrits.cbma-project.eu/
description: Provenance: abbaye de Cîteaux
description: Provenance: http://www.wikidata.org/entity/Q843261
description: Provenance: https://www.geonames.org/3024876
description: Provenance: http://www.idref.fr/030974844/id
description: Provenance: https://catalogue.bnf.fr/ark:/12148/cb12228351v
Alternative techniques for detection of inaccessible pipe corrosion
Creators: name: Khalili, Pouyan
Publisher: name: Imperial College London
Year: 2018

description: Testing for corrosion in the petrochemical industry has always been a significant challenge which takes up a large portion of the operating expenditure. Whereas major advancements have been made for the detection of general corrosion, inspection at inaccessible locations, such as at pipe supports, remains a demanding prospect; this signifies the need for an alternative technique, capable of dealing with various surface conditions encountered when testing at such locations including weld patches, T-joints, surface roughness and coatings. Long range guided waves are commonly used to detect relatively severe defects in plain sections of pipe but are less suited to inspection at supports because the support itself gives significant reflection. The reflection coefficient at the support reduces with frequency so it would be beneficial to test at higher frequencies, which can also improve the sensitivity of the test to smaller, pitting-type defects. Following the attractive properties of the Higher Order Mode Cluster (HOMC) proposed by Balasubramaniam et al. (IIT Madras), this research starts by investigating the nature of the mode cluster and shows that the features of this method are essentially those of the A1 mode in the high frequency-thickness regime. The study then goes on to investigate the possibility of exciting a single mode Lamb wave with low dispersion at a frequency-thickness of around 20 MHz-mm. Excitation of the A1 mode was considered because of its relationship with HOMC and due to its non-dispersive nature and low surface motion at such frequency-thickness products; this makes it attractive for inspection at supports since it will be unaffected by the support itself and also by surface roughness and attenuative coatings. The thesis then explores the relative ability of different transducer types for single mode excitation in the medium and high frequency-thickness regimes; here the practical feasibility of exciting the A1 mode at around 20 MHz-mm, in spite of its low surface motion, is investigated. Next, a systematic performance analysis of the A1 mode compared to the existing inspection techniques is carried out and, finally the sensitivity of this technique to realistic 3-D pitting-type holes is established. The thesis shows that the A1 mode is an attractive tool for the detection of localized, sharp, severe defects that will be missed by standard, lower frequency guided wave testing.
Measuring Two Constructs of Afterschool Activity Participation: Breadth and Intensity
Creators: name: Palma, Jose R.
name: Van Boekel, Martin
name: Hufnagle, Ashley S.
Publisher: name: Texas Education Review
Year: 2023
Subjects: positive youth development
after school activity participation
breadth
intensity
measurement
developmental outcomes

description: The benefits of afterschool activity participation for youth development are well-documented. An interesting question dominating this field is whether there is a threshold at which point participating in too many activities (breadth) and spending too much time in those activities (intensity) is negatively associated with desirable outcomes. Using 9th grade student data (N=115,731) from three administrations of a state-wide school survey, we explore whether students’ breadth and intensity of afterschool participation is associated with GPA and perceived family and community support. Findings corroborate prior research in demonstrating the association between breadth and intensity. Importantly, we extend the discussion, with three important observations. First, a linear model is insufficient for modeling these complex associations with outcomes. Second, there is a threshold at which too much participation has a negative impact in these outcomes. Third, variations in activities, time windows and indices have small or no influence in the association with outcomes.
Stress energy momentum in terms of geodesic accelerations and variational tensors including torsion
Creators: name: Marsh, Adam
Publisher: name: arXiv
Year: 2025
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences
subject: 53Z05

description: General relativity and its extensions including torsion identify stress energy momentum as being proportional to the Einstein tensor, thus ensuring both symmetry and conservation. Here we visualize stress energy and momentum by identifying the associated relative fractional accelerations of geodesics encoded in the Einstein tensor. This also provides an intuitive explanation for the vanishing divergence of the Einstein tensor. In order to obtain this same energy and momentum for other actions such as that of Dirac theory including torsion, we then review the various stress energy momentum tensors resulting from the variation of different quantities derived from parallel transport, and detail their interrelationships. This provides an opportunity to revisit some classic material from a geometric point of view, including Einstein-Cartan theory, the Sciama-Kibble formalism, and the Belinfante-Rosenfeld relation, whose derivation in the mostly pluses signature would seem to not be otherwise readily available.
description: 32 pages, 8 figures, to appear in Ann. Phys
Hydrodynamical simulations of galaxy properties: Environmental effects
Creators: name: Elizondo, D.
name: Yepes, G.
name: Kates, R.
name: Klypin, A.
Publisher: name: arXiv
Year: 1998
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Using N-body+hydro simulations we study relations between the local environments of galaxies on 0.5 Mpc scale and properties of the luminous components of galaxies. Our numerical simulations include effects of star formation and supernova feedback in different cosmological scenarios: the standard Cold Dark Matter model, the Broken Scale Invariance model (BSI), and a model with cosmological constant (LCDM). In this paper, we concentrate on the effects of environment on colors and morphologies of galaxies, on the star formation rate and on the relation between the total luminosity of a galaxy and its circular velocity. We demonstrate a statistically significant theoretical relationship between morphology and environment. In particular, there is a strong tendency for high-mass galaxies and for elliptical galaxies to form in denser environments, in agreement with observations. We find that in models with denser environments (CDM scenario) ~ 13 % of the galactic halos can be identified as field ellipticals, according to their colors. In simulations with less clustering (BSI and LCDM), the fraction of ellipticals is considerably lower (~ 2-3 %). The strong sensitivity of morphological type to environment is rather remarkable because our results are applicable to ``field'' galaxies and small groups. If all galaxies in our simulations are included, we find a statistically significant dependence of the galaxy luminosity - circular velocity relation on dark matter overdensity within spheres of radius 0.5 Mpc, for the CDM simulations. But if we remove ``elliptical'' galaxies from our analysis to mimic the Tully-Fisher relation for spirals, then no dependence is found in any model.
description: 44 pages, 21 figures (17 included). Submitted to New Astronomy. GIFF color plots and the complete paper in Postscript (including color figures) can be found at http://astrosg.ft.uam.es/~gustavo/newast
Cephalobus butschlii de Man.
Creators: name: Menzel, Rich.
Publisher: name: Zenodo
Year: 1913
Subjects: Biodiversity
Taxonomy
Animalia
Nematoda
Chromadorea
Rhabditida
Cephalobidae
Cephalobus
Cephalobus butschlii

description: Cephalobus bütschlii de Man.
1885. de Man, Helminthologische Beiträge. Tijdschr. Nederl. Dierk. Ver. 2. ser. Deel I, p. 20—22.
 Diese sich von C. persegnis Bast, nur durch die Gestalt und Größe der Lippen unterscheidende Art hat ihren Fundort mit den beiden obigen Arten gemeinsam. De Man fand sie u. a. in Erde, die ihm aus Rußland zugeschickt wurde (l. c. 1885).
description: Published as part of Menzel, Rich., 1913, Mononchus zschokkei n. sp. und einige wenig bekannte, für die Schweiz neue freilebende Nematoden, pp. 408-413 in Zoologischer Anzeiger 42 on page 413, DOI: 10.5281/zenodo.10797276
Indian affairs and the frontier of Texas, 1865-1880
Creators: name: Parker, Bruce Logan
Publisher: name: The University of Texas at Austin
Year: 1925
Subjects: subject: Indians of North America
subject: Texas history
subject: Frontier life
subject: Pioneer life
subject: 1865-1880
subject: Indians of Texas
subject: Indian history
subject: Government policy
subject: Indians of North America--Texas--History
subject: Frontier and pioneer life--Texas

description: The removal of the Indians from Texas in 1859 did not solve the Indian problem. During the Civil War they again roamed in Texas, and depredated on the frontier of Texas. After the war came reconstruction, and the Indian problem was not taken up for a year or more. The policy followed by the government was not effective, for twelve or fifteen years the Indians continued their raids. The frontier expanded over their hunting grounds in Texas. The buffaloes were destroyed, making it impossible for the Indians to live on the plains
Optical Detection of the Hidden Nuclear Engine in NGC~4258
Creators: name: Wilkes, Belinda J.
name: Schmidt, Gary D.
name: Smith, Paul S.
name: Mathur, Smita
name: McLeod, Kim K.
Publisher: name: arXiv
Year: 1995
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The sub-parsec masing disk recently found to be orbiting a central mass of $\sim3.6\times10^7$~\msun\ in the Seyfert/LINER galaxy NGC~4258 provides the most compelling evidence to date for the existence of a massive black hole in the nucleus of a galaxy. The disk is oriented nearly edge-on %($\bf i=83$°) and the X-ray spectrum %(Makishima \etal\ 1994) is heavily absorbed. Therefore, in this galaxy, the optical emission-line spectrum generally exhibited by an active galactic nucleus is perhaps best sought using polarized light: probing for light scattered off material surrounding the central source. New polarimetry of NGC~4258 has uncovered a compact polarized nucleus whose spectrum consists of a faint blue continuum similar to those of unobscured quasars ($F_ν\proptoν^{-1.1}$), plus broadened (\twid1000\kms) emission lines. The lines are strongly linearly polarized ($5-10$\%) at a position angle (85°$\pm$2°) coincident with the plane of the maser disk. This result provides substantiating evidence for a weakly active central engine in NGC~4258 and for the existence of obscuring, orbiting tori which impart many of the perceived distinctions between various types of active galaxy.
description: Accepted by ApJ Letters, 16 pages including 3 figures; uuencoded, gzipped postscript, also available via anon ftp at ftp://head-cfa.harvard.edu/pub/transfer/belinda/ngc4258_apjl.ps
Direct Acceleration of Pickup Ions at the Solar Wind Termination Shock: the Production of Anomalous Cosmic Rays
Creators: name: Ellison, Donald C.
name: Jones, Frank C.
name: Baring, Matthew G.
Publisher: name: arXiv
Year: 1998
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We have modeled the injection and acceleration of pickup ions at the solar wind termination shock and investigated the parameters needed to produce the observed Anomalous Cosmic Ray (ACR) fluxes. A non-linear Monte Carlo technique was employed, which in effect solves the Boltzmann equation and is not restricted to near-isotropic particle distribution functions. This technique models the injection of thermal and pickup ions, the acceleration of these ions, and the determination of the shock structure under the influence of the accelerated ions. The essential effects of injection are treated in a mostly self-consistent manner, including effects from shock obliquity, cross-field diffusion, and pitch-angle scattering. Using recent determinations of pickup ion densities, we are able to match the absolute flux of hydrogen in the ACRs by assuming that pickup ion scattering mean free paths, at the termination shock, are much less than an AU and that modestly strong cross-field diffusion occurs. Simultaneously, we match the flux ratios He$^{+}$/H$^{+}$ or O$^{+}$/H$^{+}$ to within a factor $\sim 5$. If the conditions of strong scattering apply, no pre-termination-shock injection phase is required and the injection and acceleration of pickup ions at the termination shock is totally analogous to the injection and acceleration of ions at highly oblique interplanetary shocks recently observed by the Ulysses spacecraft. The fact that ACR fluxes can be modeled with standard shock assumptions suggests that the much-discussed "injection problem" for highly oblique shocks stems from incomplete (either mathematical or computer) modeling of these shocks rather than from any actual difficulty shocks may have in injecting and accelerating thermal or quasi-thermal particles.
description: 15 pages including 1 table and 10 figures, AASTeX emulateapj format, accepted for publication in The Astrophysical Journal
title: Möglichkeiten und Grenzen numerischer Strömungsakustik mit OpenFOAM
Creators: name: Stein, Andreas
name: Pelz, Peter F.
Publisher: name: Deutsche Gesellschaft für Akustik e.V.
Year: 2022

description: Das Open Source Toolkit OpenFOAM hat sich in den letzten Jahren zu einer interessanten Alternative zu kommerziellen Strömungslösern entwickelt. Technische Strömungen aus verschiedensten Anwendungsbereichen (Aerodynamik, Turbomaschinen, Mehrphasenströmungen, ...) lassen sich mit der Software berechnen und auswerten. Durch den frei verfügbaren Quellcode ist OpenFOAM nahezu beliebig erweiterbar. Dies macht die Software interessant für Forschungseinrichtungen, wohingegen die Freiheit von Lizenzgebühren insbesondere für den Unternehmenseinsatz attraktiv ist. Bei der numerischen Berechnung von Strömungsschall stößt das Programmpaket jedoch an Grenzen, insbesondere bei den vorhandenen Diskretisierungsverfahren für die numerische Berechnung der Schallausbreitung. Dieser Beitrag zeigt Möglichkeiten und Grenzen auf, Strömungsschall mit OpenFOAM zu berechnen. Dabei wird auf Methoden eingegangen, welche auf numerisch kostengünstigen RANS Simulationen beruhen (SNGR, RPM) und somit eine interessante Alternative zu LES basierten Verfahren bilden. Es werden Beispiele gezeigt, welche die Grenzen der Software bei der Berechnung der Schallausbreitung aufzeigen und Lösungsvorschläge präsentiert.
title: ADCO, Cartulaire de Cîteaux pour les domaines de Saint-Jean de Losne et Losne (XVIIIe siècle), Cart. 198-01 (11 H 1055), 185 folios, f. 0073
Creators: name: de la Côte d'Or, Archives départementales
name: Petot, Frédéric
name: Archives Départementales De La Côte-D'Or
name: Petot, Frédérique
name: Projet CBMA
name: CG21/F.PETOT/2019
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2020
Subjects: subject: Corpus Burgundiae Medii Aevi
subject: Chartes de la Bourgogne du Moyen Âge
subject: LaMOP
subject: Laboratoire de Médiévistique Occidentale de Paris
subject: cartulaire

description: Cartulaire de Cîteaux pour les domaines de Saint-Jean de Losne et Losne (XVIIIe siècle), Archives départementales de la Côte-d'Or, Cart. 198-01 (11 H 1055), 185 folios, f. 0073, Numérisation en mode image.
description: Relation: http://www.cbma-project.eu/
description: Bibliographic citation: Cartulaire de Cîteaux pour les domaines de Saint-Jean de Losne et Losne (XVIIIe siècle), Archives départementales de la Côte-d'Or, Cart. 198-01 (11 H 1055), 185 folios, f. 0073, in Projet CBMA - Corpus Burgundiae Medii Aevi [Ressource en ligne], https://manuscrits.cbma-project.eu/
description: Provenance: abbaye de Cîteaux
description: Provenance: http://www.wikidata.org/entity/Q843261
description: Provenance: https://www.geonames.org/3024876
description: Provenance: http://www.idref.fr/030974844/id
description: Provenance: https://catalogue.bnf.fr/ark:/12148/cb12228351v
Developing fractional quantum Hall states at even-denominator fillings 1/6 and 1/8
Creators: name: Wang, Chengyu
name: Madathil, P. T.
name: Singh, S. K.
name: Gupta, A.
name: Chung, Y. J.
name: Pfeiffer, L. N.
name: Baldwin, K. W.
name: Shayegan, M.
Publisher: name: arXiv
Year: 2025
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: In the extreme quantum limit, when the Landau level filling factor $ν<1$, the dominant electron-electron interaction in low-disorder two-dimensional electron systems leads to exotic many-body phases. The ground states at even-denominator $ν=$ 1/2 and 1/4 are typically Fermi seas of composite fermions carrying two and four flux quanta, surrounded by the Jain fractional quantum Hall states (FQHSs) at odd-denominator fillings $ν=p/(2p\pm1)$ and $ν=p/(4p\pm1)$, where $p$ is an integer. For $ν<$ 1/5, an insulating behavior, which is generally believed to signal the formation of a pinned Wigner crystal, is seen. Our experiments on ultrahigh-quality, dilute, GaAs two-dimensional electron systems reveal developing FQHSs at $ν=p/(6p\pm1)$ and $ν=p/(8p\pm1)$, manifested by magnetoresistance minima superimposed on the insulating background. In stark contrast to $ν=$ 1/2 and 1/4, however, we observe a pronounced, sharp minimum in magnetoresistance at $ν=$ 1/6 and a somewhat weaker minimum at $ν=$ 1/8, suggesting developing FQHSs, likely stabilized by the pairing of composite fermions that carry six and eight flux quanta. Our results signal the unexpected entry, in ultrahigh-quality samples, of FQHSs at even-denominator fillings 1/6 and 1/8, which are likely to harbor non-Abelian anyon excitations.
description: 7+20 pages, 3+14 figures
Energy and momentum dependence of nuclear short-range correlations - Spectral function, exclusive scattering experiments and the contact formalism
Creators: name: Weiss, Ronen
name: Korover, Igor
name: Piasetzky, Eliezer
name: Hen, Or
name: Barnea, Nir
Publisher: name: arXiv
Year: 2018
Subjects: subject: Nuclear Theory (nucl-th)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: Results of electron-induced one- and two-nucleon hard knockout reactions, $A(e,e'p)$ and $A(e,e'pN)$, in kinematics sensitive to nuclear short-range correlations, are studied using the nuclear contact formalism. A relation between the spectral function and the nuclear contacts is derived and used to analyze the dependence of the data on the initial energy and momentum of the knocked-out proton. The ratio between the number of emitted proton-proton pairs and proton-neutron pairs is shown to depend predominantly on a single ratio of contacts. This ratio is expected to present a deep minima in the initial energy and momentum plane, associated with the node in the proton-proton wave function. The formalism is applied to analyze data from recent $^4$He and $^{12}$C electron-scattering experiments performed at Jefferson laboratory. Different nucleon-nucleon potentials were used to asses the model-dependence of the results. For the ratio of proton-proton to proton-neutron pairs in $^4$He, a fair agreement with the experimental data is obtained using the two potentials, whereas for the ratio of proton-proton pairs to the total knocked-out protons in $^{12}$C, some of the features of the theory are not seen in the experimental data. Several possible explanations for this disagreement are discussed. It is also observed that the spectral function at specific domains of the momentum-energy plane is sensitive to the nucleon-nucleon interaction. Based on this sensitivity, it might be possible to constrain the short range part of the nuclear potential using such experimental data.
Topics in sampling schemes based on Markov processes
Creators: name: Nüsken, Nikolas
Publisher: name: Imperial College London
Year: 2018

description: In this thesis we consider several topics related to the construction of optimal Markovian dynamics in the context of sampling from high-dimensional probability distributions. Firstly, we introduce and analyse Langevin samplers that consist of perturbations of the standard overdamped and underdamped Langevin dynamics. The perturbed dynamics is such that its invariant measure is the same as that of the unperturbed dynamics. We show that appropriate choices of the perturbations can lead to samplers that have improved properties, at least in terms of reducing the asymptotic variance. We present a detailed analysis of the new Langevin samplers for Gaussian target distributions. Our theoretical results are supported by numerical experiments with non-Gaussian target measures. Secondly, we present a general framework for the analysis and development of ensemble based methods, encompassing both diﬀusion and piecewise deterministic Markov processes. For many performance criteria of interest, including the asymptotic variance, the task of ﬁnding efficient couplings can be phrased in terms of problems related to the theory of optimal transportation. We investigate general structural properties, proving a singularity theorem that has both geometric and probabilistic interpretations. Moreover, we show that those problems can often be solved approximately and support our findings with numerical experiments. Addressing the convergence to equilibrium of coupled processes we furthermore derive a modiﬁed Poincaré inequality. Finally, under some conditions, we prove exponential ergodicity for the zigzag process using hypocoercivity techniques.
The role of leptin receptors in the endocrine pancreas and nucleus tractus solitarius
Creators: name: Soedling, Helen
Publisher: name: Imperial College London
Year: 2016

description: The highly controlled regulation of pancreatic hormone secretion is vital to keep the body’s glucose concentration at a constant level. Defects in the regulation of glucose levels are involved in several metabolic diseases, including type 2 diabetes and obesity. Leptin is a satiety hormone with important roles in the maintenance of body weight and glucose homeostasis. Mice that lack leptin (ob/ob) or the leptin receptor (db/db) are massively obese and have diabetes symptoms. Leptin has been demonstrated to have an effect on glucose homeostasis that is suggested to be secondary to the obesity these animals are suffering from. Currently, it is unclear how leptin regulates glucose homeostasis. Leptin mediates its effects by interaction with its leptin receptor (LepRb), which is highly expressed in the hypothalamus, and at lower levels in the periphery. Leptin’s effect on glucose homeostasis has been proposed to be mediated via its receptor expressed on pancreatic cells affecting insulin secretion. Previous animal studies have deleted the leptin receptor in pancreatic β- and α-cells using either “leaky” or inefficient Cre-drivers resulting in conflicting results on glucose homeostasis. In this study, we use a β-cell selective Ins1Cre promoter in mice to investigate the role of leptin receptor expressed on pancreatic cells effect on glucose homeostasis. Deletion of LepRb was found to have minor effects on glucose tolerance in female animals an effect that was only detected in 8 weeks old animals. No effect was observed in male animals or in females above the age of 8 weeks. It is well established that the LepRb in hypothalamus plays an important role in regulation of energy balance. However, the LepRb is expressed in several areas outside hypothalamus, such as the nucleus of the solitary tract (NTS). GLP-1-expressing neurons in this area express the LepRb and it is therefore possible that these neurons mediate an effect on energy homeostasis or glucose homeostasis. We have therefore deleted LepRb in GLP-1 expressing neurons with a proglucagon specific promoter iGluCre. In this study, we found no effect on body weight or glucose homeostasis in animals deleted for LepRb in GLP-1 expressing neurons. Hypothalamus is the brain region that plays a key role in the regulation of feeding and energy homeostasis. This area contains anorexigenic and orexigenic neurons and intermingled with these neurons are subpopulation of neurons named RIP2Cre neurons expressing insulin. Due to the neurons location in the feeding area of the brain they are most likely having a role in energy homeostasis. Previous studies have suggested that tumour suppressor LKB1 plays a role on body weight and food intake in these neurons. Therefore, we deleted LKB1 selectively in the RIP2Cre neurons but failed to see a difference in body weight.
QARC: Video Quality Aware Rate Control for Real-Time Video Streaming via Deep Reinforcement Learning
Creators: name: Huang, Tianchi
name: Zhang, Rui-Xiao
name: Zhou, Chao
name: Sun, Lifeng
Publisher: name: arXiv
Year: 2018
Subjects: subject: Multimedia (cs.MM)
subject: FOS: Computer and information sciences

description: Due to the fluctuation of throughput under various network conditions, how to choose a proper bitrate adaptively for real-time video streaming has become an upcoming and interesting issue. Recent work focuses on providing high video bitrates instead of video qualities. Nevertheless, we notice that there exists a trade-off between sending bitrate and video quality, which motivates us to focus on how to get a balance between them. In this paper, we propose QARC (video Quality Awareness Rate Control), a rate control algorithm that aims to have a higher perceptual video quality with possibly lower sending rate and transmission latency. Starting from scratch, QARC uses deep reinforcement learning(DRL) algorithm to train a neural network to select future bitrates based on previously observed network status and past video frames, and we design a neural network to predict future perceptual video quality as a vector for taking the place of the raw picture in the DRL's inputs. We evaluate QARC over a trace-driven emulation. As excepted, QARC betters existing approaches.
description: Accepted by ACM Multimedia 2018
Spatiotemporal esolution of global protein synthesis during herpes simplex virus infection using bioorthogonal precursors and click chemistry
Creators: name: Teo, Su Hui Catherine
Publisher: name: Imperial College London
Year: 2018

description: Herpes simplex virus (HSV) modulates the host cell’s proteome and transcriptome during infection to fulfil the needs of the virus for productive replication and transmission. Using bioorthogonal precursors and click chemistry, I have examined spatiotemporal aspects of global protein synthesis during single step replication and cell-to-cell transmission with results revealing new insights into the complex spatial interplay between translational control processes, protein localisation and transcription during HSV infection. For the first time, translational suppression and recovery is visualised at the single cell level, reflecting a very early biphasic switch in translational control. The biphasic switch is dependent on the RNase activity of HSV virion host shutoff protein (vhs), and vhs also mediates eIF4H nuclear translocation coupled to the initial suppression. During translational recovery, my results also show rapid accumulation of newly synthesised proteins in novel subnuclear domains termed newly synthesised protein domains (NPDs). ICP22 is specifically required for NPD formation and shows selective recruitment to these domains. Additionally, a host protein, SSRP1, is also displaced from its normal localisation in the nucleolus and selectively recruited to NPDs very early in infection, dependent on ICP22 expression. Furthermore, spatial analysis of newly transcribed RNA also reveals that early after infection transcripts accumulate in irregular structures termed RNA islands which form distinct populations. While a fraction of RNA islands localises juxtaposed with a subpopulation of NPDs, the majority of this newly synthesised RNA shows precise colocalisation in distinct domains which also recruits a cellular RNA helicase, p68. These later RNA domains adjoin foci containing the immediate-early transcriptional regulator ICP4 in a specifically organised manner. In addition to profound qualitative changes observed during translational recovery, quantitative proteomics and identification of the newly synthesised nuclear proteome using HPG pulsed-SILAC with LC- MS/MS indicates coordinated mobilisation of distinct cellular pathways, in particular eIF2 signalling pathway and RNA post-transcriptional modification. These results reveal new features of protein metabolism during infection, and involvement of ICP22 in newly synthesised protein processing pathways.
High-Energy Spectral Complexity from Thermal Gradients in Black Hole Atmospheres
Creators: name: Skibo, J. G.
name: Dermer, C. D.
Publisher: name: arXiv
Year: 1995
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We show that Compton scattering of soft photons with energies near 100 eV in thermally stratified black-hole accretion plasmas with temperatures in the range 100 keV - 1 MeV can give rise to an X-ray spectral hardening near 10 keV. This could produce the hardening observed in the X-ray spectra of black holes, which is generally attributed to reflection or partial covering of the incident continuum source by cold optically thick matter. In addition, we show that the presence of very hot (kT=1 MeV) cores in plasmas leads to spectra exibiting high energy tails similar to those observed from Galactic black-hole candidates.
description: 11 pages, uuencoded gziped postscript, ApJ Letters in press
Ramphastos piperivorus Linnaeus, 1758, spec. nov.
Creators: name: Linnaeus, Carolus
Publisher: name: Laurentius Salvius
Year: 1758
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Aves
Piciformes
Ramphastidae
Ramphastos
Ramphastos piperivorus

description: Ramphastos piperivorus [spec. nov.]
R. rostro nigro: carina crassissima.
Habitat in America meridionali.
description: Published as part of Linnaeus, Carolus, 1758, Systema Naturae per regna tria naturae: secundum classes, ordines, genera, species, cum characteribus, differentiis, synonymis, locis, Stockholm :Laurentius Salvius on page 103, DOI: 10.5962/bhl.title.542, http://zenodo.org/record/3922206
Crystallographic and ligand binding studies on human secretory Rab27a
Creators: name: Jamshidiha, Mostafa
Publisher: name: Imperial College London
Year: 2017

description: Rab27a is a member of Rab GTPase family of proteins, which plays a key role in cellular transport and docking of secretory vesicles at the plasma membrane. Rab27a is involved in transport/secretion of melanosomes and vesicles containing insulin, histamine, amylase, chemokines, metaloproteases and exosomes. Rab27a has been shown to promote the growth and invasion of multiple cancer types such as breast, lung, pancreatic and hepatocellular carcinoma. Evidence suggesting the significant role of Rab27a in multiple cancer types suggests Rab27a inhibition could potentially impact invasive primary tumors and metastases. The reliance of drug discovery on high-resolution structures prompted us to design suitable Rab27a constructs that crystallize but leave biologically relevant pockets of interest unoccupied. We used Rab27a-Slp2a complex and Rab27a homologue crystal structures to modify Rab27a into a suitable construct. In the first approach, I fused the Rab-binding domain (RBD) of an effector to Rab27a to promote crystallization. Crystals from this construct diffracted to a resolution better than 2 Å. The main advantage for this approach is leaving the SF4 pocket, which is an important interface for Rab27a Slp2a interaction, empty. This pocket is not accessible in crystals obtained from Rab27a-Slp2a complex. In the second approach, I analyzed the crystal contact residues of Rab3a, a homologue of Rab27a. This information was used to make site-specific mutations based on residues important for crystallization of Rab3a, to assist the crystallization of Rab27a. This approach produced a construct that crystallizes consistently in short period of time, while leaving large surface of the interaction interface empty. Apart from crystallization, we carried out screening campaigns using differential scanning fluorimetry (DSF) and surface plasmon resonance (SPR) against Rab27a to identify ligands that bind to Rab27a-effector interaction interface. In the first approach, a fragment library using differential scanning fluorimetry (DSF) was screened against Rab27a. In the second method, a chemical library enriched with molecules complementary to the SF4 pocket was screened against Rab27a using surface plasmon resonance (SPR). At least one chemical series targeting the SF4 pocket was obtained from screening. Altogether, in this work, I have obtained crystals of Rab27a suitable for ligand interaction studies and ligands targeting Rab27a-effector interaction interface.
Ferroelectricity and piezoelectricity in monolayers and nanoplatelets of SnS
Creators: name: Lebedev, Alexander I.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The ground-state structure of monolayers and nanoplatelets of SnS with a thickness from two to five monolayers is calculated from first principles. It is shown that nanoobjects with only odd number of monolayers are ferroelectric. The ferroelectric, piezoelectric, and elastic properties of these polar structures are calculated. The appearance of polarization in these nanoobjects is explained by an uncompensated polarization that exists in an antiferroelectric structure of bulk SnS. The mechanism of ferroelectricity, in which the ferroelectric distortion is associated with short-range ordering of lone pairs, can be regarded as a way of creating ferroelectrics with high Curie temperature.
description: 8 pages, 4 figures, 6 tables