cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
OSI Brief 1: What do we mean by open?
Creators: name: Plutchak, T. Scott
Publisher: name: Open Scholarship Initiative Proceedings
Year: 2018

description: “Open scholarship” is a loose umbrella term for the broad and growing interest in providing more openness and transparency to the research process and its outputs. While discussions of open in the early years of the century focused almost exclusively on peer reviewed journal literature, primarily in the sciences, there is now considerable interest in developing more openness across the entire life cycle of scholarship.
description: Open Scholarship Initiative Proceedings, 2018
Issue Brief 2: How fast is open growing?
Creators: name: Hampson, Glenn
Publisher: name: Open Scholarship Initiative Proceedings
Year: 2019

description: How many of the world’s research articles can be read for free by anyone anywhere? This “opening” of the scholarly record is a herculean task of global importance for research and society, being championed by groups around the world from universities to libraries, governments, research funders and publishers.
description: Open Scholarship Initiative Proceedings, 2019
Mapa de Localização dos sítios amostrais estudados no ribeirão Graipu.
Creators: name: Elisangela Cristina Da Silva Costa
Publisher: name: Zenodo
Year: 2023
Subjects: ribeirão Graipu
Guanhães
Mapa de localização dos sítios amostrais

description: Mapa de localização dos sítios amostrais estudados no ribeirão Graipu_Guanhães/ MG, apresentado como produto técnico da dissertação de mestrado, da aluna Elisangela Cristina da Silva Costa, do Instituto Federal de Ciência e Tecnologia do Estado de Minas Gerais.
Neutrino Mixing from $Δ(6n^2)$ Groups
Creators: name: Neder, Thomas
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Experimentally viable lepton mixing parameters can be predicted in so-called direct flavour models with Majorana neutrinos using $Δ(6n^2)$ groups as a flavour group. In direct models, in which the flavour group is broken to a $Z_2\times Z_2$ subgroup in the neutrino sector, mixing angles and Dirac CP phase are purely predicted from symmetry. General predictions of direct models with $Δ(6n^2)$ flavour groups are that all mixing angles are fixed up to a discrete choice and that the Dirac CP phase is $0$ or $π$; Furthermore, the middle column of the mixing matrix is trimaximal which yields the sum rule $θ_{23}=45^\circ \mp θ_{13}/\sqrt{2}$ depending on the Dirac phase. These predictions of lepton mixing parameters are compatible with recent global fit results or will be tested experimentally in the near future. It is the first time that such predictions have been obtained model-independently for an infinite series of groups.
description: 3 pages; Contribution to the Proceedings of NuPhys2013: Prospects in Neutrino Physics, Institute of Physics, London, UK, Dec. 19-20, 2013
Neue synthetisch-biologische Wege zur CO2-Fixierung
Creators: name: Erb, Tobias J.
name: Weber, Andreas P. M.
Publisher: name: Universität Hamburg
Year: 2023
Subjects: CO2 fixation, Photosynthesis, CO2 uptake and conversion. new enzymes, pathways for CO2 uptake. blue-green algae

description: New synthetic-biological pathways for CO2 fixation: Photosynthesis fixes about 130 Gt C (about 477 Gt CO2) annually. This natural process thus plays a key role in the global carbon cycle. However, photosynthesis cannot fully compensate for anthropogenic CO2 emissions of about 10 Gt C per year. An important bottleneck of photosynthesis is CO2 uptake and conversion. Synthetic biology opens up the possibility of realising new enzymes and metabolic pathways for CO2 uptake that surpass the naturally evolved CO2 fixation pathways in efficiency. These solutions have the potential to improve photosynthesis by 20 to 200% and contribute to CO2 uptake and storage (for example in blue-green algae or crops) on a global scale if the scientific and societal challenges can be overcome.
CobWeb 1.0: Machine Learning Tool Box for Tomographic Imaging
Creators: name: Chauhan, Swarup
name: Sell, Kathleen
name: Enzmann, Frieder
name: Rühaak, Wolfram
name: Wille, Thorsten
name: Sass, Ingo
name: Kersten, Michael
Publisher: name: Zenodo
Year: 2018
Subjects: Machine Learning, Image Segmentation, Digital Rocks, X-ray tomography, Non-local-means

description: CobWeb toolbox is build for automated image segmentation of X-ray computed tomographic images of geo-materials and thereafter calculation of geometrical parameters such as porosity, pore size distribution and volume fraction.

CobWeb uses unsupervised and supervised machine learning techniques for image segmentation and different image filteration techniques for image prepocessing and noise reduction. For more details please refer to the papers below.

Chauhan, S., Rühaak, W., Khan, F., Enzmann, F., Mielke, P., Kersten, M., Sass, I.: Processing of rock core microtomography images: Using seven different machine learning algorithms, Computers & Geosciences, 86, 120-128, 2016a.

Chauhan, S., Rühaak, W., Anbergen, H., Kabdenov, A., Freise, M., Wille, T., Sass, I.“Phase Segmentation of X-Ray Computer Tomography Rock Images using Machine Learning Techniques: an Accuracy and Performance Study. ” Solid Earth Discuss., se-2016-44, 2016b.
description: {"references": ["Chauhan, S., R\u00fchaak, W., Khan, F., Enzmann, F., Mielke, P., Kersten, M., Sass, I.: Processing of rock core microtomography images: Using seven different machine learning algorithms, Computers & Geosciences, 86, 120-128, 2016a.", "Chauhan, S., R\u00fchaak, W., Anbergen, H., Kabdenov, A., Freise, M., Wille, T., Sass, I.\"Phase Segmentation of X-Ray Computer Tomography Rock Images using Machine Learning Techniques: an Accuracy and Performance Study. \" Solid Earth Discuss., se-2016-44, 2016b"]}
Locating the CSM Emission within the Type Ia Supernova Remnant N103B
Creators: name: Guest, Benson T.
name: Blair, William P.
name: Borkowski, Kazimierz J.
name: Ghavamian, Parviz
name: Hendrick, Sean P.
name: Long, Knox S.
name: Petre, Robert
name: Raymond, John C.
name: Rest, Armin
name: Sankrit, Ravi
name: Seitenzahl, Ivo R.
name: Williams, Brian J.
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We present results from deep Chandra observations of the young Type Ia supernova remnant (SNR) 0509-68.7, also known as N103B, located in the Large Magellanic cloud (LMC). The remnant displays an asymmetry in brightness, with the western hemisphere appearing significantly brighter than the eastern half. Previous multi-wavelength observations have attributed the difference to a density gradient and suggested circumstellar material origins, drawing similarities to Kepler's SNR. We apply a clustering technique combined with traditional imaging analysis to spatially locate various emission components within the remnant. We find that O and Mg emission is strongest along the blast wave, and coincides with Spitzer observations of dust emission and optical emission from the non-radiative shocks. The abundances of O and Mg in these regions are enhanced relative to the average LMC abundances and appear as a distinct spatial distribution compared to the ejecta products, supporting the circumstellar medium (CSM) interpretation. We also find that the spatial distribution of Cr is identical to that of Fe in the interior of the remnant, and does not coincide at all with the O and Mg emission.
description: 23 pages, 17 Figures. Accepted for publication in ApJ
Strong coupling between a topological insulator and a III-V heterostructure at terahertz frequency
Creators: name: To, D. Quang
name: Wang, Zhengtianye
name: Ho, Q. Dai
name: Hu, Ruiqi
name: Acuna, Wilder
name: Liu, Yongchen
name: Bryant, Garnett W.
name: Janotti, Anderson
name: Zide, Joshua M. O.
name: Law, Stephanie
name: Doty, Matthew F.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We probe theoretically the emergence of strong coupling in a system consisting of a topological insulator (TI) and a III-V heterostructure using a numerical approach based on the scattering matrix formalism. Specifically, we investigate the interactions between terahertz excitations in a structure composed of Bi$_{2}$Se$_{3}$ and GaAs materials. We find that the interaction between the Bi$_{2}$Se$_{3}$ layer and AlGaAs/GaAs quantum wells with intersubband transitions (ISBTs) in the terahertz frequency regime creates new hybrid modes, namely Dirac plasmon-phonon-ISBT polaritons. The formation of these hybrid modes results in anti-crossings (spectral mode splitting) whose magnitude is an indication of the strength of the coupling. By varying the structural parameters of the constituent materials, our numerical calculations reveal that the magnitude of splitting depends strongly on the doping level and the scattering rate in the AlGaAs/GaAs quantum wells, as well as on the thickness of the GaAs spacer layer that separates the quantum-well structure from the TI layer. Our results reveal the material and device parameters required to obtain experimentally-observable signatures of strong coupling. Our model includes the contribution of an extra two-dimensional hole gas (2DHG) that is predicted to arise at the Bi$_{2}$Se$_{3}$/GaAs interface, based on density functional theory (DFT) calculations that explicitly account for details of the atomic terminations at the interface. The presence of this massive 2DHG at the TI/III-V interface shifts the dispersion of the Dirac plasmon-ISBT polaritons to higher frequencies. The damping rate at this interface, in contrast, compensates the effect of the 2DHG. Finally, we observe that the phonon resonances in the TI layer are crucial to the coupling between the THz excitations in the TI and III-V materials.
Ground-based gamma-ray astronomy: history and development of techniques
Creators: name: Bose, D.
name: Chitnis, V. R.
name: Majumdar, P.
name: Acharya, B. S.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Very High Energy (VHE) gamma rays constitute one of the main pillars of high energy astrophysics. Gamma rays are produced under extreme relativistic conditions in the Universe. VHE gamma$ rays can be detected indirectly on the ground. Detection of these energetic photons poses several technological challenges. Firstly, even though gamma rays are highly penetrative, the Earth's atmosphere is opaque to them. Secondly, these gamma rays are to be detected against the overwhelming background of cosmic rays. When a VHE gamma ray arrives at the top of the atmosphere it produces charged secondaries. These charged particles produce Cherenkov flashes in the optical band. Even though the first attempts to detect these Cherenkov flashes were made almost 70 years ago, it took several decades of relentless efforts to streamline the technique. Ground-based VHE gamma-ray astronomy has now established itself as one of the crucial branches of conventional high energy astronomy to study the relativistic Universe. In this article we look back and present a historical perspective followed by a discussion on the current status and finally what lies ahead.
description: 35 pages, 30 figures, accepted for publication in The European Physical Journal Special Topics
FRAMEx II: Simultaneous X-ray and Radio Variability in Active Galactic Nuclei $-$ The Case of NGC 2992
Creators: name: Fernandez, Luis C.
name: Secrest, Nathan J.
name: Johnson, Megan C.
name: Schmitt, Henrique R.
name: Fischer, Travis C.
name: Cigan, Phillip J.
name: Dorland, Bryan N.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Using simultaneous Very Long Baseline Array and Neil Gehrels Swift Observatory X-ray Telescope observations of the active galactic nucleus (AGN) in NGC 2992 over a six-month observing campaign, we observed a large drop in core 5 cm radio luminosity, by a factor of $>3$, in tandem with factor of $>5$ increase in $2-10$ keV X-ray luminosity. While NGC 2992 has long been an important object for studies of X-ray variability, our study is the first simultaneous X-ray and radio variability campaign on this object. We observe that the X-ray spectral index does not change over the course of the flare, consistent with a change in the bulk amount of Comptonizing plasma, potentially due to a magnetic reconnection event in the accretion disk. The drop in apparent radio luminosity can be explained by a change in free-free absorption, which we calculate to correspond to an ionized region with physical extent and electron density consistent with the broad line region (BLR). Our results are consistent with magnetic reconnection events in the dynamic accretion disk creating outbursts of ionizing material, increasing Compton up-scattering of UV accretion disk photons and feeding material into the BLR. These findings present an important physical picture for the dynamical relationship between X-ray and radio emission in AGNs.
description: 18 pages, 13 figures; Accepted for publication in ApJ
Ozeandüngung zur CO2-Speicherung durch Mikroalgen
Creators: name: Teckentrup, Lina
Publisher: name: Universität Hamburg
Year: 2023
Subjects: Ocean fertilisation, CO2 storage, microalgae, net zero by 2050, carbon dioxide removal, carbon sequestration

description: Ocean fertilisation for CO2 storage by microalgae: Anthropogenic greenhouse gas emissions are the dominant cause of the observed global warming (IPCC 2021). In 2021, anthropogenic emissions of carbon dioxide were estimated at 11.0 GtC yr-1 (Friedlingsstein et al. 2022). In spite of this, to prevent warming beyond 1.5°C, greenhouse gas emissions need to reach net zero by 2050. However, currently all projected scenarios capable of reaching this goal rely on ‚negative emissions‘ (Rogelj et al. 2018). Negative emissions describe carbon dioxide removal methods that enhance the uptake and sequestration of anthropogenic carbon dioxide. This chapter focuses on ocean fertilisation, a specific concept of carbon sequestration where nutrients are added to the ocean surface with the intent to increase algae productivity and sequester newly generated biomass in the deep sea.
Diagnosing the Optically Thick/Thin Features Using the Intensity Ratio of Si IV Resonance Lines in Solar Flares
Creators: name: Zhou, Yi-an
name: Hong, Jie
name: LI, Y.
name: Ding, M. D.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: In the optically thin regime, the intensity ratio of the two Si IV resonance lines (1394 and 1403 Å ) are theoretically the same as the ratio of their oscillator strengths, which is exactly 2. Here, we study the ratio of the integrated intensity of the Si IV lines ($R=\int I_{1394}(λ)\mathrm{d}λ/\int I_{1403}(λ)\mathrm{d}λ$) and the ratio of intensity at each wavelength point ($r(Δλ)=I_{1394}(Δλ)/I_{1403}(Δλ)$) in two solar flares observed by the Interface Region Imaging Spectrograph. We find that at flare ribbons, the ratio $R$ ranges from 1.8 to 2.3 and would generally decrease when the ribbons sweep across the slit position. Besides, the distribution of $r(Δλ)$ shows a descending trend from the blue wing to the red wing. In loop cases, the Si IV line presents a wide profile with a central reversal. The ratio $R$ deviates little from 2, but the ratio $r(Δλ)$ can vary from 1.3 near the line center to greater than 2 in the line wings. Hence we conclude that in flare conditions, the ratio $r(Δλ)$ varies across the line, due to the variation of the opacity at the line center and line wings. We notice that, although the ratio $r(Δλ)$ could present a value which deviates from 2 as a result of the opacity effect near the line center, the ratio $R$ is still close to 2. Therefore, caution should be taken when using the ratio of the integrated intensity of the Si IV lines to diagnose the opacity effect.
description: 10 pages, 5 figures, Accepted for publication in ApJ
Cotton Prices and Markets
Creators: name: Cox, Alonzo B.
name: Cox, Alonzo B.
Publisher: name: Unknown
Year: 1926
Subjects: subject: Crop Production/Industries
subject: Demand and Price Analysis
subject: International Relations/Trade
subject: Marketing
subject: FOS: Economics and business
subject: Risk and Uncertainty

description: Excerpt from the report: An understanding of the marketing of cotton involves a knowledge of the demand for cotton, the supply of it, the machinery developed to bring demand and supply into trading relations, and the historical development of these three market factors. This analysis of the fundamental factors involved in cotton price making and this description of the markets in which prices are made is a contribution to that understanding.
Ptolemy coordinates, Dehn invariant, and the A-polynomial
Creators: name: Zickert, Christian K.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Geometric Topology (math.GT)
subject: FOS: Mathematics

description: We define Ptolemy coordinates for representations that are not necessarily boundary-unipotent. This gives rise to a new algorithm for computing the SL(2,C) A-polynomial, and more generally the SL(n,C) A-varieties. We also give a formula for the Dehn invariant of an SL(n,C)-representation.
description: 21 pages, 15 figures
Mapa de Uso e Ocupação do Solo_ribeirão Graipu/ Guanhães-MG.
Creators: name: Elisangela Cristina Da Silva Costa
Publisher: name: Zenodo
Year: 2023
Subjects: Uso e ocupação do solo
ribeirão Graipu
Guanhães

description: Mapa de uso e ocupação do solo da sub-Bacia do ribeirão Graipu_Guanhães/ MG, apresentado como produto técnico da dissertação de mestrado da aluna Elisangela Cristina da Silva Costa, do Instituto Federal de Ciência e Tecnologia do Estado de Minas Gerais.
title: Cultiver le pouvoir décisionnel, honorer la diversité culturelle
title: accompagner les femmes immigrées ayant recours à l’IVG
titleType: Subtitle
title: Cultiver le pouvoir décisionnel, honorer la diversité culturelle
titleType: AlternativeTitle
Creators: name: Brahier, Estelle
name: Covas, Jessica
Publisher: name: Unknown
Year: 0
Subjects: subject: Réfugiées politiques
subject: Avortement
subject: Soins infirmiers

description: L’interruption volontaire de grossesse (IVG) est une pratique médicale controversée soulevant plusieurs débats éthiques et politiques. La législation de celle-ci diffère entre les pays du Monde. Ces multiples disparités en matière de loi et les représentations culturelles diversifiées de cette pratique influencent la prise en soin. La Suisse étant un pays avec une forte mixité culturelle, il est pertinent de s’intéresser au vécu des femmes immigrées ayant recours à une IVG.ButL’objectif de cette revue de littérature est d’analyser des études et récolter des résultats pertinents pour proposer des recommandations professionnelles, dans le but d’optimiser la prise en soin des femmes immigrées ayant recours à une IVG.
Die Darstellung der Stadt Wellmich am Rhein auf einem Stich von Matthäus Merian d. Ä.
Creators: name: Frank, Lorenz
Publisher: name: Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege
Year: 2022

description: Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege, Bd. 46 Nr. 2 (2005): Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege
CHANG-ES. XXIV. First Detection of A Radio Nuclear Ring and Potential LLAGN in NGC 5792
Creators: name: Yang, Yang
name: Irwin, Judith
name: Li, Jiangtao
name: Wiegert, Theresa
name: Wang, Q. Daniel
name: Sun, Wei
name: Damas-Segovia, A.
name: Li, Zhiyuan
name: Shen, Zhiqiang
name: Walterbos, Rene A. M.
name: Vargas, Carlos J.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We report the discoveries of a nuclear ring of diameter 10$\arcsec$ ($\sim$1.5 kpc) and a potential low luminosity active galactic nucleus (LLAGN) in the radio continuum emission map of the edge-on barred spiral galaxy NGC~5792. These discoveries are based on the Continuum Halos in Nearby Galaxies - an Expanded Very Large Array (VLA) Survey, as well as subsequent VLA observations of sub-arcsecond resolution. Using a mixture of H$α$ and 24 $μ$m calibration, we disentangle the thermal and non-thermal radio emission of the nuclear region, and derive a star formation rate (SFR) of $\sim 0.4~M_{\sun}$ yr$^{-1}$. We find that the nuclear ring is dominated by non-thermal synchrotron emission. The synchrotron-based SFR is about three times of the mixture-based SFR. This result indicates that the nuclear ring underwent more intense star-forming activity in the past, and now its star formation is in the low state. The sub-arcsecond VLA images resolve six individual knots on the nuclear ring. The equipartition magnetic field strength $B_{\rm eq}$ of the knots varies from 77 to 88 $μ$G. The radio ring surrounds a point-like faint radio core of $S_{\rm 6GHz}=(16\pm4)$ $μ$Jy with polarized lobes at the center of NGC~5792, which suggests an LLAGN with an Eddington ratio $\sim10^{-5}$. This radio nuclear ring is reminiscent of the Central Molecular Zone (CMZ) of the Galaxy. Both of them consist of a nuclear ring and LLAGN.
description: 16 pages, 4 figures, 4 tables, accepted for publication in ApJ
Die Burg in Boppard am Rhein – Neue Forschungsergebnisse zur Baugeschichte
Creators: name: Frank, Lorenz
Publisher: name: Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege
Year: 2022

description: Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege, Bd. 46 Nr. 4 (2005): Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege
title: Параметры «зеленой» трансформации российской экономики: новые измерения
title: Parameters of the “green” transformation of the Russian economy: a new dimension
Creators: name: Черняева, Римма Владленовна
name: Пахомова, Анна Ивановна
Publisher: name: Издательский центр СурГУ
Year: 2020

description: Статья посвящена актуальной проблеме регионального развития – разработке методических инструментов оценки «зеленой» трансформации в экономике региона. Рассматривается понятие «индексы “зеленой” экономики» и его методологическая роль. Проведен анализ существующих отечественных и зарубежных подходов к оценке «озеленения» экономики, аргументировано использование комплексного подхода для данного исследования. Выделены критерии оценки степени «зеленой» экономической трансформации. Авторами предложен методологический подход, особенность которого заключается в том, что он учитывает не только объективные показатели, представленные в статистической отчетности Росстата, но и привлекательность субъективных оценок местного населения, что позволяет более адекватно оценивать решение экологических проблем в регионе. Анализируемые в статье показатели «зеленой» экономики могут быть использованы для создания в России собственного методологического центра и системы проверки «зеленых» проектов в регионах для преобразования рынков в условиях перехода к экологически чистому будущему.
description: The article is devoted to the current problem of regional development, which is the development of methodologic tools for assessing “green” transformation in the region's economy. The article considers the concept of “green economy indices” and its methodologic role. An analysis of existing Russian and foreign approaches to the assessment of the greening of economy is made and the use of a comprehensive approach for this research is argued. Criteria for assessing the degree of green economic transformation are identified. A methodological approach is proposed. It takes into account not only the objective indicators presented in the statistical reports of the Russian Federal State Statistics Service but also the attractiveness of subjective values of the local population. This makes it possible to assess the solution to environmental problems of the population in the region more adequately. The analyzed indicators of the green economy could be used in Russia for the development of methodological centers and systems of checking “green” projects in the regions to transform markets in the context of a transition to an environmentally friendly future.
Pulse Peak Migration during the Outburst Decay of the Magnetar SGR 1830-0645: Crustal Motion and Magnetospheric Untwisting
Creators: name: Younes, G.
name: Lander, S. K.
name: Baring, M. G.
name: Enoto, T.
name: Kouveliotou, C.
name: Wadiasingh, Z.
name: Ho, W.
name: Harding, A. K.
name: Arzoumanian, Z.
name: Gendreau, K. C.
name: Guver, T.
name: Hu, C. -P.
name: Malacaria, C.
name: Ray, P. S.
name: Strohmayer, T.
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Magnetars, isolated neutron stars with magnetic field strengths typically $\gtrsim10^{14}$~G, exhibit distinctive months-long outburst epochs during which strong evolution of soft X-ray pulse profiles, along with nonthermal magnetospheric emission components, is often observed. Using near-daily NICER observations of the magnetar SGR 1830-0645 during the first 37 days of a recent outburst decay, a pulse peak migration in phase is clearly observed, transforming the pulse shape from an initially triple-peaked to a single-peaked profile. Such peak merging has not been seen before for a magnetar. Our high-resolution phase-resolved spectroscopic analysis reveals no significant evolution of temperature despite the complex initial pulse shape. Yet the inferred surface hot spots shrink during the peak migration and outburst decay. We suggest two possible origins for this evolution. For internal heating of the surface, tectonic motion of the crust may be its underlying cause. The inferred speed of this crustal motion is $\lesssim100$~m~day$^{-1}$, constraining the density of the driving region to $ρ\sim10^{10}$~g~cm$^{-3}$, at a depth of $\sim200$~m. Alternatively, the hot spots could be heated by particle bombardment from a twisted magnetosphere possessing flux tubes or ropes, somewhat resembling solar coronal loops, that untwist and dissipate on the 30-40~day timescale. The peak migration may then be due to a combination of field-line footpoint motion (necessarily driven by crustal motion) and evolving surface radiation beaming. These novel dataset paints a vivid picture of the dynamics associated with magnetar outbursts, yet it also highlights the need for a more generic theoretical picture where magnetosphere and crust are considered in tandem.
description: ApJL accepted
A new paradigm for Alpine Fault paleoseismicity: the northern section of the Alpine Fault
Creators: name: Langridge, Robert M.
name: Howarth, Jamie D.
Publisher: name: GNS Science
Year: 2018

description: The 194 km long northern section of the Alpine Fault, as defined in the New Zealand national seismic hazard model (AlpineK2T fault source), runs from Lake Kaniere to Tophouse, near St Arnaud. This NHRP-funded project focuses on a paleo-earthquake record of the northern section, which is less well-established than that of the central and southern sections of the Alpine Fault. The new datasets collected as part of this project are: airborne lidar, on-fault paleoseismic trenches and a paleoseismic lake cores, along with an extensive program of radiocarbon dating. These data are used to develop precise records of the timing of past earthquakes that will indicate how they correlate along the length of the northern section.
Four new swaths of airborne LiDAR were acquired along the Alpine Fault between the Hokitika River and Lake Daniell. These swaths were used to map the fault in detail and to locate paleoseismic sites and small geomorphic offsets, e.g. horizontally offset channels and terrace risers that are used to characterise past earthquake slip at these sites. (auth)
Behavioural responses of a trans-hemispheric migrant to climate oscillation
Creators: name: Siddiqi-Davies, Katrina
Publisher: name: Zenodo
Year: 2024

description: “Behavioural responses of a trans-hemispheric migrant to climate oscillation”    

Proceedings of the Royal Society B    

DOI: https://doi.org/10.1098/rspb.    

Katrina Siddiqi-Davies1, Joe Wynn1, 2, Oliver Padget1,3, Patrick Lewin1, Natasha Gillies1,3, Joe Morford1, Lewis Fisher-Reeves1, Paris Jaggers1, Greg Morgan4, Jóhannis Danielsen5, Holly Kirk6, 1,Annette Fayet7, 1, Akiko Shoji1, 8,Sarah Bond1,9, Martyna Syposz1, 10, Lou Maurice11, Robin Freeman12, 1, Ben Dean1, David Boyle1, Tim Guilford1
Die Baugeschichte des Pfalzgrafenstein bei Kaub am Rhein
Creators: name: Frank, Lorenz
Publisher: name: Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege
Year: 2022

description: Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege, Bd. 47 Nr. 3 (2006): Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege
Die nördlichen Teile von Kern- und Vorburg der Marksburg – Neue Untersuchungsergebnisse
Creators: name: Frank, Lorenz
Publisher: name: Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege
Year: 2022

description: Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege, Bd. 49 Nr. 1 (2008): Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege
MPEC 2023-L23 : 2023 LB
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2023
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469
subject: 2023 LB

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.
The split Casimir operator and solutions of the Yang-Baxter equation for the $osp(M|N)$ and $s\ell(M|N)$ Lie superalgebras, higher Casimir operators, and the Vogel parameters
Creators: name: Isaev, A. P.
name: Provorov, A. A.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Mathematical Physics (math-ph)
subject: Representation Theory (math.RT)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We find the characteristic identities for the split Casimir operator in the defining and adjoint representations of the $osp(M|N)$ and $s\ell(M|N)$ Lie superalgebras. These identities are used to build the projectors onto invariant subspaces of the representation $T^{\otimes 2}$ of the $osp(M|N)$ and $s\ell(M|N)$ Lie superalgebras in the cases when $T$ is the defining and adjoint representations. For defining representations, the $osp(M|N)$- and $s\ell(M|N)$-invariant solutions of the Yang-Baxter equation are expressed as rational functions of the split Casimir operator. For the adjoint representation, the characteristic identities and invariant projectors obtained are considered from the viewpoint of a universal description of Lie superalgebras by means of the Vogel parametrization. We also construct a universal generating function for higher Casimir operators of the $osp(M|N)$ and $s\ell(M|N)$ Lie superalgebras in the adjoint representation.
description: Submitted to Theoretical and Mathematical Physics; references corrected
ALMA 200 pc imaging of a z~7 quasar reveals a compact, disk-like host galaxy
Creators: name: Walter, Fabian
name: Neeleman, Marcel
name: Decarli, Roberto
name: Venemans, Bram
name: Meyer, Romain
name: Weiss, Axel
name: Banados, Eduardo
name: Bosman, Sarah E. I.
name: Carilli, Chris
name: Fan, Xiaohui
name: Riechers, Dominik
name: Rix, Hans-Walter
name: Thompson, Todd A.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present 0".035 resolution (~200 pc) imaging of the 158 um [CII] line and the underlying dust continuum of the z=6.9 quasar J234833.34-305410.0. The 18 h ALMA observations reveal extremely compact emission (diameter ~1 kpc) that is consistent with a simple, almost face-on, rotation-supported disk with a significant velocity dispersion of ~160 km/s. The gas mass in just the central 200 pc is ~4x10^9 M_sun, about a factor two higher than that of the central supermassive black hole. Consequently we do not resolve the black hole's sphere of influence, and find no kinematic signature of the central supermassive black hole. Kinematic modeling of the [CII] line shows that the dynamical mass at large radii is consistent with the gas mass, leaving little room for a significant mass contribution by stars and/or dark matter. The Toomre-Q parameter is less than unity throughout the disk, and thus is conducive to star formation, consistent with the high infrared luminosity of the system. The dust in the central region is optically thick, at a temperature >132 K. Using standard scaling relations of dust heating by star formation, this implies an unprecedented high star formation rate density of >10^4 M_sun / yr / kpc^2. Such a high number can still be explained with the Eddington limit for star formation under certain assumptions, but could also imply that the central supermassive black hole contributes to the heating of the dust in the central 110 pc.
description: Accepted for publication in The Astrophysical Journal
Singular Lagrangians, Constrained Hamiltonian Systems and Gauge Invariance: An Example of the Dirac-Bergmann Algorithm
Creators: name: Brown, J. David
Publisher: name: arXiv
Year: 2022
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: The Dirac-Bergmann algorithm is a recipe for converting a theory with a singular Lagrangian into a constrained Hamiltonian system. Constrained Hamiltonian systems include gauge theories -- general relativity, electromagnetism, Yang Mills, string theory, etc. The Dirac-Bergmann algorithm is elegant but at the same time rather complicated. It consists of a large number of logical steps linked together by a subtle chain of reasoning. Examples of the Dirac-Bergmann algorithm found in the literature are designed to isolate and illustrate just one or two of those logical steps. In this paper I analyze a finite-dimensional system that exhibits all of the major steps in the algorithm. The system includes primary and secondary constraints, first and second class constraints, restrictions on Lagrange multipliers, and both physical and gauge degrees of freedom. This relatively simple system provides a platform for discussing the Dirac conjecture, constructing Dirac brackets, and applying gauge conditions.
description: Final Version
Die Brömserburg in Rüdesheim am Rhein
Creators: name: Frank, Lorenz
Publisher: name: Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege
Year: 2022

description: Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege, Bd. 50 Nr. 2 (2009): Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege
das wunderbar gebeu und haus Reichenberg – Zur Entstehungsgeschichte der katzenelnbogischen Burg bei St. Goarshausen
Creators: name: Frank, Lorenz
Publisher: name: Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege
Year: 2022

description: Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege, Bd. 55 Nr. 2 (2014): Burgen und Schlösser. Zeitschrift für Burgenforschung und Denkmalpflege
The cosmological moduli problem and naturalness
Creators: name: Bae, Kyu Jung
name: Baer, Howard
name: Barger, Vernon
name: Deal, Robert Wiley
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The cosmological moduli problem (CMP) comes in three parts: 1. potential violation of BBN constraints from late decaying moduli fields, 2. the moduli-induced gravitino problem wherein gravitinos are overproduced and 3. the moduli-induced lightest SUSY particle (LSP) overproduction problem. We examine the cosmological moduli problem and its connection to electroweak naturalness. We calculate the various two-body decay widths of a light modulus field into MSSM particles and gravitinos within general supersymmetric models. We include both phase space and mixing effects. We examine cases without and with helicity suppression of modulus decays to gravitinos (cases 1 & 2) and/or gauginos (cases A & B). For case B1, we evaluate regions of gravitino mass m_{3/2} vs. modulus mass m_ϕparameter space constrained by BBN, by overproduction of gravitinos and by overproduction of neutralino dark matter, along with connections to naturalness. For this case, essentially all of parameter space is excluded unless m_ϕ>~ 2.5\times 10^3 TeV with m_ϕ<2m_{3/2}. For a potentially most propitious case B2 with ϕdecay to Higgs and matter turned off, then modulus branching fractions to SUSY and to gravitinos become highly suppressed at large m_ϕ. But since the modulus number density increases faster than the branching fractions decrease, there is still gross overproduction of neutralino dark matter. We also show that in this scenario the thermally produced gravitino problem is fixed by huge entropy dilution, but non-thermal gravitino production from moduli decay remains a huge problem unless it is kinematically suppressed with m_ϕ< 2m_{3/2}. In a pedagogical appendix, we present detailed calculations of modulus field two-body decay widths.
description: 73 pages with 15 .png figures; revised version contains added discussion plus 16th figure and added references
Environmental and Medicinal value analysis of Moringa (Moringa oleifera) tree species in Sanja, North Gondar, Ethiopia
Creators: name: Gedefaw, Mohammed
Publisher: name: Zenodo
Year: 2015

description: This study was conducted in Sanja district that aimed on the, Environmental and Medicinal value analysis of

Moringa (Moringa oleifera) tree species. The study aimed to assess the roles of Moringa (Moringa oleifera)

tree species for environmental, economic and its medicinal values. Step by step procedures were designed to

take soil samples from the field. Simple random sampling method was used to take samples. Sample plots were

laid to takesample from the soil and DBH of trees were measured. The soil samples were taken from Moringa

land and areas with no Morinaga trees grown for organic carbon determination and soil fertility estimation of

the soil for comparative analysis. Based on the study 98.742 ton/ha and 4.894 ton/ha the maximum and

minimum carbon stocks observed in the above ground biomass, respectively. On the other hand, the carbon

content in the soil carbon pool was 587.21118 ton/ha and 101.3601 ton/ha maximum and minimum values per

plot of the study site respectively on the Moringa site. But, the maximum and minimum carbon content in areas

with no Moringa tree was 485.57 ton/ha and 29.71 ton/ha respectively. The data were analyzed using

Statistical Package for Social Science (SPSS) software version 20.
Zwischen kriegerischer Auseinandersetzung und Durchsetzung von Herrschaft – die Entwicklung der Burg in Boppard am Rhein
Creators: name: Frank, Lorenz
Publisher: name: Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege
Year: 2022

description: Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege, Bd. 56 Nr. 3 (2015): Burgen und Schlösser. Zeitschrift für Burgenforschung und Denkmalpflege
Demonstration of VegaPlus: Optimizing Declarative Visualization Languages
Creators: name: Yang, Junran
name: Joo, Hyekang Kevin
name: Yerramreddy, Sai S.
name: Li, Siyao
name: Moritz, Dominik
name: Battle, Leilani
Publisher: name: arXiv
Year: 2022
Subjects: subject: Databases (cs.DB)
subject: FOS: Computer and information sciences

description: While many visualization specification languages are user-friendly, they tend to have one critical drawback: they are designed for small data on the client-side and, as a result, perform poorly at scale. We propose a system that takes declarative visualization specifications as input and automatically optimizes the resulting visualization execution plans by offloading computational-intensive operations to a separate database management system (DBMS). Our demo emphasizes live programming of visualizations over big data, enabling users to write or import Vega specifications, view the optimized plans from our system, and even modify these plans and compare their performance via a dedicated performance dashboard.
Surfactant-triggered disassembly of electrostatic complexes probed at optical and quartz crystal microbalance length scales
Creators: name: Schonbeck, N.
name: Kvale, K.
name: Demarcy, T.
name: Giermanska, J.
name: Chapel, J. -P.
name: Berret, J. -F.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: A critical advantage of electrostatic assemblies over covalent and crystalline bound materials is that associated structures can be disassembled into their original constituents. Nanoscale devices designed for the controlled release of functional molecules already exploit this property. To bring some insight into the mechanisms of disassembly and release, we study the disruption of molecular electrostatics based interactions via competitive binding with ionic surfactants. To this aim free-standing micron-size wires were synthesized using oppositely charged poly(diallyldimethylammonium chloride) and poly(acrylic acid) coated iron oxide nanoparticles. The disassembly is induced by the addition of sodium dodecyl sulfates that complex preferentially the positive polymers. The process is investigated at two different length scales: the length scale of the particles (10 nm) through the Quartz Crystal Microbalance technique, and that of the wires (> 1 micron) via optical microscopy. Upon surfactant addition, the disassembly is initiated at the surface of the wires by the release of nanoparticles and by the swelling of the structure. In a second step, erosion involving larger pieces takes over and culminates in the complete dissolution of the wires, confirming the hypothesis of a surface-type swelling and erosion process.
description: 22 pages 8 figures
Evaluation of the capability of local helioseismology to discern between monolithic and spaghetti sunspot models
Creators: name: Felipe, T.
name: Crouch, A. D.
name: Birch, A. C.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The helioseismic properties of the wave scattering generated by monolithic and spaghetti sunspots are analyzed by means of numerical simulations. In these computations, an incident f or p1 mode travels through the sunspot model, which produces absorption and phase shift of the waves. The scattering is studied by inspecting the wavefield, computing travel-time shifts, and performing Fourier-Hankel analysis. The comparison between the results obtained for both sunspot models reveals that the differences in the absorption coefficient can be detected above noise level. The spaghetti model produces an steep increase of the phase shift with the degree of the mode at short wavelengths, while mode-mixing is more efficient for the monolithic model. These results provide a clue for what to look for in solar observations to discern the constitution of sunspots between the proposed monolithic and spaghetti models.
description: Accepted for publication in The Astrophysical Journal
Towards a More Complete Optical Census of Active Galactic Nuclei, Via Spatially-Resolved Spectroscopy
Creators: name: Comerford, Julia M.
name: Negus, James
name: Barrows, R. Scott
name: Wylezalek, Dominika
name: Greene, Jenny E.
name: Müller-Sánchez, Francisco
name: Nevin, Rebecca
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: While emission-line flux ratio diagnostics are the most common technique for identifying active galactic nuclei (AGNs) in optical spectra, applying this approach to single fiber spectra of galaxies can omit entire subpopulations of AGNs. Here, we use spatially resolved spectroscopy from the Mapping Nearby Galaxies at Apache Point Observatory (MaNGA) survey to construct a sample of 10 galaxies where Baldwin-Philips-Terlevich line flux ratio diagnostics classify each galaxy's central $3^{\prime\prime}$ spectrum as LINER or star forming, while $>10\%$ of the spaxels in the galaxy's MaNGA footprint are classified as Seyfert. We obtain Chandra observations of these 10 galaxies with off-nuclear Seyfert regions to determine whether AGNs are actually present in them. Our main result is that 7-10 (depending on strictness of criteria) of the galaxies host one or more X-ray AGNs, even though none of them were classified as AGNs based on their single-fiber optical spectra. We find that these AGNs were not identified in the single-fiber spectra because they are AGNs in the nuclei of companion galaxies, low luminosity AGNs, dust obscured AGNs, and/or flickering AGNs. In summary, we find that off-nuclear AGN signatures may increase the number of known AGNs by a factor of two over what conventional single nuclear fiber spectra identify. Our results show that spatially resolved spectroscopy can be leveraged to reveal a more complete census of AGNs that are traditionally missed by single fiber spectra.
description: 20 pages, 5 figures, accepted for publication in ApJ
Rencontre conflictuelle : le cas de la crise requin à La Réunion
Creators: name: Roux-Cuvelier, Willem
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 2018
Subjects: Crise requin
Relations humains/non-humains
La Réunion
Anthropologie

description: Cette thèse a pour sujet le phénomène connu sous le nom de « crise requin » qui sévit à l’île de La Réunion depuis 2011, et plus précisément les différentes controverses sociales qui ont émergé à cette occasion. L’objectif de cette thèse est d’étudier l’impact de la crise requin sur les différents acteurs impliqués afin de mieux comprendre les changements qu’elle a opérés sur la relation entre l’humain et la mer. La méthodologie de cette étude repose principalement sur un terrain de trois mois dans lequel je suis parti à la Réunion, à la rencontre de divers acteurs du phénomène. Les résultats de cette recherche m’ont permis de déduire que la relation qu’un individu a avec la crise requin dépendait en partie de son positionnement par rapport à la surface de l’eau. C’est pour cela que j’ai choisi de répartir les acteurs que j’ai rencontrés dans trois catégories : sur l’eau, sous l’eau et hors de l’eau.