cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
X-Shooter Survey of Young Intermediate Mass Stars -- I. Stellar Characterization and Disc Evolution
Creators: name: Iglesias, Daniela P.
name: Panić, Olja
name: Ancker, Mario van den
name: Petr-Gotzens, Monika G.
name: Siess, Lionel
name: Vioque, Miguel
name: Pascucci, Ilaria
name: Oudmaijer, René
name: Miley, James
Publisher: name: arXiv
Year: 2022
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Intermediate mass stars (IMSs) represent the link between low-mass and high-mass stars and cover a key mass range for giant planet formation. In this paper, we present a spectroscopic survey of 241 young IMS candidates with IR-excess, the most complete unbiased sample to date within 300 pc. We combined VLT/X-Shooter spectra with BVR photometric observations and Gaia DR3 distances to estimate fundamental stellar parameters such as Teff, mass, radius, age, and luminosity. We further selected those stars within the intermediate mass range 1.5 <= Mstar/Msun <= 3.5 and discarded old contaminants. We used 2MASS and WISE photometry to study the IR-excesses of the sample, finding 92 previously unidentified stars with IR-excess. We classified this sample into 'protoplanetary', 'hybrid candidates' and 'debris' discs based on their observed fractional excess at 12microns, finding a new population of 17 hybrid disc candidates. We studied inner disc dispersal timescales for λ < 10μm and found very different trends for IMSs and low mass stars (LMSs). IMSs show excesses dropping fast during the first 6 Myrs independently of the wavelength, while LMSs show consistently lower fractions of excess at the shortest wavelengths and increasingly higher fractions for longer wavelengths, with slower dispersal rates. In conclusion, this study demonstrates empirically that IMSs dissipate their inner discs very differently than LMSs, providing a possible explanation for the lack of short period planets around IMSs.
description: 19 pages, 11 figures, Accepted to MNRAS
High-redshift quasars host galaxies: is there a stellar mass crisis?
Creators: name: Valiante, Rosa
name: Schneider, Raffaella
name: Salvadori, Stefania
name: Gallerani, Simona
Publisher: name: arXiv
Year: 2014
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We investigate the evolutionary properties of a sample of quasars at 5
description: 14 pages, 9 figures, accepted for publication in MNRAS
Direct measurement of decimeter-sized rocky material in the Oort cloud
Creators: name: Vida, Denis
name: Brown, Peter G.
name: Devillepoix, Hadrien A. R.
name: Wiegert, Paul
name: Moser, Danielle E.
name: Matlovič, Pavol
name: Herd, Christopher D. K.
name: Hill, Patrick J. A.
name: Sansom, Eleanor K.
name: Towner, Martin C.
name: Tóth, Juraj
name: Cooke, William J.
name: Hladiuk, Donald W.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: The Oort cloud is thought to be a reservoir of icy planetesimals and the source of long-period comets (LPCs) implanted from the outer Solar System during the time of giant planet formation. The abundance of rocky ice-free bodies is a key diagnostic of Solar System formation models as it can distinguish between ``massive" and ``depleted" proto-asteroid belt scenarios and thus disentangle competing planet formation models. Here we report a direct observation of a decimeter-sized ($\sim2$ kg) rocky meteoroid on a retrograde LPC orbit ($e \approx 1.0$, i = $121^{\circ}$). During its flight, it fragmented at dynamic pressures similar to fireballs dropping ordinary chondrite meteorites. A numerical ablation model fit produces bulk density and ablation properties also consistent with asteroidal meteoroids. We estimate the flux of rocky objects impacting Earth from the Oort cloud to be $1.08^{+2.81}_{-0.95} \mathrm{meteoroids/10^6 km^2/yr}$ to a mass limit of 10 g. This corresponds to an abundance of rocky meteoroids of $\sim6^{+13}_{-5}$\% of all objects originating in the Oort cloud and impacting Earth to these masses. Our result gives support to migration-based dynamical models of the formation of the Solar System which predict that significant rocky material is implanted in the Oort cloud, a result not explained by traditional Solar System formation models.
description: Accepted for publication in Nature Astronomy
Thalassianthidae Milne Edwards 1857
Creators: name: Titus, Benjamin M.
name: Bennett-Smith, Morgan F.
name: Chiodo, Tommaso
name: Rodríguez, Estefanía
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Cnidaria
Anthozoa
Actiniaria
Thalassianthidae

description: Family Thalassianthidae Milne Edwards, 1857  Included Taxa  Cryptodendrum adhaesivum Klunzinger, 1877
No changes
description: Published as part of Titus, Benjamin M., Bennett-Smith, Morgan F., Chiodo, Tommaso & Rodríguez, Estefanía, 2024, The clownfish-hosting sea anemones (Anthozoa: Actiniaria): updated nomenclature, biogeography, and practical field guide., pp. 1-34 in Zootaxa 5506 (1) on page 6, DOI: 10.11646/zootaxa.5506.1.1, http://zenodo.org/record/13745824
Isotropization and Complexity Analysis of Decoupled Solutions in $f(\mathbb{R},\mathbb{T})$ Theory
Creators: name: Sharif, M.
name: Naseer, Tayyab
Publisher: name: arXiv
Year: 2022
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: This paper formulates some new exact solutions to the field equations by means of minimal gravitational decoupling in the context of $f(\mathbb{R},\mathbb{T})$ gravity. For this purpose, we consider anisotropic spherical matter distribution and add an extra source to extend the existing solutions. We apply the transformation only on the radial metric potential that results in two different sets of the modified field equations, each of them corresponding to their parent source. The initial anisotropic source is represented by the first set, and we consider two different well-behaved solutions to close that system. On the other hand, we impose constraints on the additional source to make the second set solvable. We, firstly, employ the isotropization condition which leads to an isotropic system for a particular value of the decoupling parameter. We then use the condition of zero complexity of the total configuration to obtain the other solution. The unknowns are determined by smoothly matching the interior and exterior spacetimes at the hypersurface. The physical viability and stability of the obtained solutions is analyzed by using the mass and radius of a compact star $4U 1820-30$. It is concluded that both of our extended solutions meet all the physical requirements for considered values of the coupling/decoupling parameters.
description: 29 pages, 11 figures
The impact of response-guided methods on single-case designs
Creators: name: Swan, Daniel M.
name: 0000-0002-5679-0983
Publisher: name: The University of Texas at Austin
Year: 2019
Subjects: Single-case designs
Effect size
Meta-analysis

description: Single-case designs (SCDs) are commonly used in special education in order to study small populations and focused, idiosyncratic interventions. In these designs, observations of a participant made in a baseline phase prior to treatment are compared to observations in a phase after or concurrent to treatment. The difference between the baseline phase and treatment phase provides information about the treatment effect. Historically, the most common method for the analysis of SCD data has been visual analysis, but there is a growing interest in the analysis and meta-analysis of SCD data using parametric methods. Among the issues that researchers are interested in is the problem of stability in the baseline phase. More specifically, researchers from the visual analysis tradition often observe the baseline phase until the data pattern reaches stability, generally characterized in terms of minimal trend and variability. This form of SCD is sometimes referred to as a response-guided experiment or response-guided design. Previous simulation research has examined this issue, however these studies have focused on a particular, narrow form of response-guided design and used data generating processes that may not be credible for the types of data common to SCD studies. In this study I explored several different ways to operationalize response-guided designs, as well as alternative data generating models for commonly observed outcomes. I applied the response-guided algorithms to empirical SCD data, as well as simulated SCD baselines to explore the credibility of the response-guided algorithms. I also examined the impact of these response-guided algorithms on treatment effect estimates from SCDs, applied to response-guided data generated using both traditional and alternative data generating models. The results of these simulations suggest that response-guided designs are likely to have an impact on the magnitudes of treatment effects that depend upon the variability of the sample data, such as non-overlap indices like the NAP and parametric effect sizes like the within-case standardized mean difference. Even in the case of effect sizes that are not notably affected by response-guided designs, such as the log-response ratio, the standard errors are likely to be biased as a consequence of response-guided designs. I discuss the broader implications of these results, including alternatives to response-guided designs and how researchers and journal editors can help the field to better understand the impacts of response-guided design practices.
Kerr-Newman electron as spinning soliton
Creators: name: Burinskii, Alexander
Publisher: name: arXiv
Year: 2014
Subjects: subject: General Physics (physics.gen-ph)
subject: FOS: Physical sciences

description: Measurable parameters of the electron indicate that its background should be described by the Kerr-Newman (KN) solution. Spin/mass ratio of the electron is extreme large, and the black hole horizons disappear, opening a topological defect of spacetime -- the Kerr singular ring of the Compton size, which may be interpreted as a closed fundamental string to the low energy string theory. The singular and twosheeted structure of the corresponding Kerr space has to be regularized, and we consider the old problem of regular source of the KN solution. As a development of the earlier Keres-Israel-Hamity-López model, we describe the model of smooth and regular source forming a gravitating and relativistically rotating soliton based on the chiral field model and the Higgs mechanism of broken symmetry. The model reveals some new remarkable properties: 1) the soliton forms a relativistically rotating bubble of the Compton radius, which is filled by the oscillating Higgs field in pseudo-vacuum state, 2) boundary of the bubble forms a domain wall which interpolates between the internal flat background and the external exact Kerr-Newman (KN) solution, 3) phase transition is provided by a system of the chiral fields, 4) vector potential of the external the KN solution forms a closed Wilson loop which is quantized, giving rise to quantum spin of the soliton. 5) soliton is bordered by a closed string, which is a part of the general complex stringy structure.
description: 25 pages, 3 figures
The German RECAP questionnaire : linguistic validation and cognitive debriefing in German adults with self-reported atopic eczema and parents of affected children
Creators: name: Gabes, Michaela
name: Tischer, Christina
name: Herrmann, Anne
name: Howells, Laura
name: Apfelbacher, Christian
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2021
Subjects: subject: Atopic dermatitis
subject: Atopic eczema
subject: Long-term control
subject: Cross-cultural translation
subject: Content validity
subject: 610.72

description: Background: Recap of atopic eczema (RECAP) is a patient-reported outcome measure (PROM) assessing eczema control. Long-term control of eczema is one of the four core outcome domains for atopic eczema trials. This instrument has been recently developed in the UK. Objective: This study aimed to translate the English RECAP into German and test its content validity in a German population with self-reported atopic eczema. Methods: A six-step procedure including two forward and one backward translations, two consensus decisions and an expert review was performed to obtain a German version of RECAP. We conducted semi-standardized cognitive interviews with adults with atopic eczema (n = 7) and parents having children affected by this disease (n = 5). A “think-aloud” method was used and aspects of comprehensibility, comprehensiveness and relevance according to the COnsensus-based Standards for the selection of health Measurement INstruments (COSMIN) criteria were examined. Interviews were coded using qualitative content analysis. Results: No particular linguistic problems were encountered during forward-backward translation. Minor wording changes were made as required. The title was adjusted to a more familiar German term of the disease (which is ‘Neurodermitis’). The recall period was rephrased from ‘over the last week’ to ‘over the last seven days’ since there was a different cultural understanding of the time frame. Regarding content validity, the items of the German RECAP were considered to be comprehensible, comprehensive and relevant for the participants and parents of affected children. The participants understood the instruction and considered the one-week recall period and the response options as appropriate. Conclusions: A German version of RECAP that is linguistically equivalent to the original version is now available but further assessment of its measurement properties is needed.
Integrating PIMMS into the Simulation Workflow
Creators: name: Pascoe, Charlotte L
name: Tourte, Greg
name: Parton, Graham A
Publisher: name: Zenodo
Year: 2012
Subjects: data and information
computer science
metadata

description: The workflow of running simulations, converting from model data format to a common data format and then making model data available to the community contain many different actions. At some point along the way we expect the scientist to pause and document what they did.
In an ideal world model documentation should happen early in this workflow however in practice models and simulations are very often documented only when the data is used in research publications.  The PIMMS project (Portable Infrastructure for the Metafor Metadata System) hopes to revolutionise the documentation of models and simulations by creating an infrastructure that makes model documentation easy to do very early in the workflow. 

This is an interactive poster where we invite participants to indicate where the act of documenting simulations occurs in their typical workflow. And also where the act of documentation should occur in their ideal workflow. In this way the PIMMS team hope to find out those places where PIMMS would be of most benefit to the community.  An established PIMMS infrastructure should fit seamlessly into the simulation workflow and significantly reduce the effort required to fully document simulations.
description: Previously curated at: http://cedadocs.ceda.ac.uk/918/

Event type: workshop.

The publish date on this item was its original published date.

This work was funded by: JISC; STFC; University of Reading; and, University of Bristol.

This item was not refereed before the publication

Associated projects:
PIMMS - Portable Infrastructure for the Metafor Metadata System
Metafor - Metadata for Climate

Main files in this record:
PIMMSWorkflow_NCAS2012.pdf

Item originally deposited with Centre for Environmental Data Analysis (CEDA) document repository by Dr Charlotte L Pascoe. Transferred to CEDA document repository community on Zenodo on 2022-11-24
Imaging and nulling properties of sparse-aperture Fizeau interferometers
Creators: name: Henault, F.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: In this communication are presented rigorous and approximate analytical expressions of the Point Spread Function (PSF) and Field of View (FoV) achievable by multi-aperture Fizeau interferometers, either of the imaging or nulling types. The described formalism can be helpful for dimensioning future space missions in search of habitable extra-solar planets. Herein the characteristics of PSF and FoV are derived from simple analytical expressions that are further computed numerically in order to evidence the critical role of pupil re-imaging along the interferometer arms. The formalism is also well suited to simulating pseudo-images generated by a nulling Fizeau interferometer, and numerical computations demonstrate that it is only efficient for very short baselines. Finally, two different designs improving the nulling capacities of such exoplanet observing instruments are briefly presented and discussed
description: 14 pages. arXiv admin note: text overlap with arXiv:1004.0205
The temperature dependence of electronic eigenenergies in the adiabatic harmonic approximation
Creators: name: Poncé, Samuel
name: Antonius, Gabriel
name: Gillet, Yannick
name: Boulanger, Paul
name: Janssen, Jonathan Laflamme
name: Marini, Andrea
name: Côté, Michel
name: Gonze, Xavier
Publisher: name: arXiv
Year: 2014
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The renormalization of electronic eigenenergies due to electron-phonon interactions (temperature dependence and zero-point motion effect) is important in many materials. We address it in the adiabatic harmonic approximation, based on first principles (e.g. Density-Functional Theory), from different points of view: directly from atomic position fluctuations or, alternatively, from Janak's theorem generalized to the case where the Helmholtz free energy, including the vibrational entropy, is used. We prove their equivalence, based on the usual form of Janak's theorem and on the dynamical equation. We then also place the Allen-Heine-Cardona (AHC) theory of the renormalization in a first-principle context. The AHC theory relies on the rigid-ion approximation, and naturally leads to a self-energy (Fan) contribution and a Debye-Waller contribution. Such a splitting can also be done for the complete harmonic adiabatic expression, in which the rigid-ion approximation is not required. A numerical study within the Density-Functional Perturbation theory framework allows us to compare the AHC theory with frozen-phonon calculations, with or without the rigid-ion terms. For the two different numerical approaches without rigid-ion terms, the agreement is better than 7 $μ$eV in the case of diamond, which represent an agreement to 5 significant digits. The magnitude of the non rigid-ion terms in this case is also presented, distinguishing specific phonon modes contributions to different electronic eigenenergies.
Optimal transportation and barycenter problems via convex functions
Creators: name: Ghaffari, Novin
Publisher: name: The University of Texas at Austin
Year: 2019
Subjects: Optimal transport
Wasserstein distance
Barycenter

description: This work surveys developments in optimal transportation. The first three chapters develop background to optimal transportation problems and the associatedWasserstein distances in increasing levels of specificity. The first chapter introduces optimal transport problems and known properties characterizing optimal transport plans. The second chapter develops the Wasserstein distances, arising from specific cases of optimal transport problems. Properties for the 1 and 2-Wasserstein distances, the most well-understood cases, are presented and Wasserstein distances are characterized as integral probability metrics. The third chapter presents known optimal couplings for the quadratic Wasserstein distance. The rst section discusses optimal transport on R, which has been entirely characterized; the next two sections deal with known multivariate cases. The last three sections develop algorithmic and statistical applications of optimal transportation and Wasserstein distances. Chapter four surveys recent applications from the literature. New results are vi presented in chapters five and six. In chapter five, the problem of optimal transportation is approached by studying the convex functions underlying optimal transports, listing convex functions for known transports and introduce new cases. Chapter six develops barycentric applications. The rst section develops 2-Wasserstein barycenter results. Using a xed-point framework introduced in chapter four, immediate convergence and explicit representation of the barycenter is demonstrated for some classes of distributions. The next section develops applications of 2-Wasserstein barycenters to data modeling; barycenters are used to provide exible models interpolating between several input distributions. The final section develops an extended application of the WASP method introduced in chapter four. Finally we list useful results in appendices.
title: Αστικοί υπαίθριοι χώροι μικρής κλίμακας σε αδόμητους χώρους στο κέντρο των πόλεων: 5 προτάσεις pocket parks στην πόλη της Λάρισας
titleType: AlternativeTitle
Creators: name: Γάλλου, Ανθή
Publisher: name: University of Thessaly
Year: 2014
Subjects: subject: ΑΡΧΙΤΕΚΤΟΝΙΚΗ, ΣΥΓΧΡΟΝΗ -- ΕΛΛΑΔΑ -- ΛΑΡΙΣΑ -- 21ος αιώνας
subject: ΑΣΤΙΚΗ ΑΝΑΠΤΥΞΗ -- ΕΛΛΑΔΑ -- ΛΑΡΙΣΑ
subject: ΥΠΑΙΘΡΙΑ ΑΝΑΨΥΧΗ

description: Σημείωση: το κυρίως κείμενο και το συνοδευτικό υλικό του διατίθεται σε ξεχωριστό ενιαίο αρχείο.
Secular- and merger-built bulges in barred galaxies
Creators: name: Mendez-Abreu, J.
name: Debattista, Victor P.
name: Corsini, E. M.
name: Aguerri, J. A. L.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: (Abridged) We study the incidence, as well as the nature, of composite bulges in a sample of 10 face-on barred galaxies to constrain the formation and evolutionary processes of the central regions of disk galaxies. We analyze the morphological, photometric, and kinematic properties of each bulge. Then, by using a case-by-case analysis we identify composite bulges and classify every component into a classical or pseudobulge. In addition, bar-related boxy/peanut (B/P) structures were also identified and characterised. We find only three galaxies hosting a single-component bulge (two pseudobulges and one classical bulge). We find evidence of composite bulges coming in two main types based on their formation: secular-built and merger- and secular-built. We call secular-built to composite bulges made of entirely by structures associated with secular processes such as pseudo bulges, central disks, or B/P bulges. We find four composite bulges of this kind in our sample. On the other hand, merger- and secular-built bulges are those where structures with different formation paths coexist within the same galaxy, i.e., a classical bulge coexisting with a secular-built structure (pseudobulge, central disk, or B/P). Three bulges of this kind were found in the sample. We remark on the importance of detecting kinematic structures such as sigma-drops to identify composite bulges. A large fraction (80%) of galaxies were found to host sigma-drops or sigma-plateaus in our sample revealing their high incidence in barred galaxies. The high frequency of composite bulges in barred galaxies points towards a complex formation and evolutionary scenario. Moreover, the evidence for coexisting merger- and secular-built bulges reinforce this idea. We discuss how the presence of different bulge types, with different formation histories and timescales, can constrain current models of bulge formation.
description: 20 pages, 7 figures. Accepted for publication in A&A
Poles At Infinity in On-shell Diagrams
Creators: name: Brown, Taro V.
name: Oktem, Umut
name: Trnka, Jaroslav
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this paper we study on-shell diagrams in ${\cal N}{<}4$ supersymmetric Yang-Mills (SYM) theory. These are on-shell gauge invariant objects which appear as cuts of loop integrands in the context of generalized unitarity and serve as building blocks for amplitudes in recursion relations. In the dual formulation, they are associated with cells of the positive Grassmannian $G_+(k,n)$ and the on-shell functions can be reproduced as canonical differential forms. While for the case of the ${\cal N}{=}4$ maximally supersymmetric Yang-Mills theory all poles in on-shell diagrams correspond to IR poles when the momentum flows in edges are zero, for ${\cal N}{<}4$ SYM theories there are new UV poles when the loop momenta go to infinity. These poles originate from the prefactor of the canonical dlog form and do not correspond to erasing edges in on-shell diagrams. We show that they can be interpreted as a diagrammatic operation which involves pinching a loop and performing a ``non-planar twist'' on external legs, which gives rise to a non-planar on-shell diagram. Our result provides an important clue on the role of poles at infinite momenta in on-shell scattering amplitudes, and the relation to non-planar on-shell functions.
description: 59 pages, 88 figures
Why Archive Environmental Data?
Creators: name: Parton, Graham A
name: Seers, Ben
Publisher: name: Zenodo
Year: 2011
Subjects: data and information

description: An overview of the reasons why archiving environmental data properly is an important activity and the benefits to both data suppliers and end users.
description: Previously curated at: http://cedadocs.ceda.ac.uk/896/

Event type: conference.

The publish date on this item was its original published date.

This work was funded by: Natural Environment Research Council.

This item was not refereed before the publication

Main files in this record:
NCEO_2011_Poster.pptx

Item originally deposited with Centre for Environmental Data Analysis (CEDA) document repository by Dr Graham Parton. Transferred to CEDA document repository community on Zenodo on 2022-11-24
Central Concentration of Asymmetric Features in Post-starburst Galaxies at $z \sim 0.8$
Creators: name: Himoto, Kazuharu G.
name: Kajisawa, Masaru
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present morphological analyses of Post-starburst galaxies (PSBs) at $0.7 0.8$, while only 16% (2%) of quiescent (star-forming) galaxies show such high $C_{A}$ values. Those PSBs with high $C_{A}$ have relatively low overall asymmetry of $A \sim 0.1$, but show remarkable asymmetric features near the centre. The fraction of those PSBs with high $C_{A}$ increases with increasing SSFR in 321--1000 Myr before observation rather than residual on-going star formation. These results and their high surface stellar mass densities suggest that those galaxies experienced a nuclear starburst in the recent past, and processes that cause such starbursts could lead to the quenching of star formation through rapid gas consumption, supernova/AGN feedback, and so on.
description: 18 pages, 17 figures, accepted for publication in MNRAS
The Anomalous Compressibility and Metallization of Deuterium under Shock-Wave Compression
Creators: name: Khomkin, A. L.
name: Shumikhin, A. S.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: High values of deuterium compressibility under shock-wave compression, recently discovered in several experiments, are explained by an unusual dielectric-metal phase transition from a dense molecular gas into a liquid-metal atomic gas. This phase transition recently described by authors was named the dissociative phase transition (DPT). The same phase transition describes a significant scattering of experimentally measured densities within an area of anomalous compressibility.
Isotopic ratios for C, N, Si, Al, and Ti in C-rich presolar grains from massive stars
Creators: name: Schofield, Jordan
name: Pignatari, Marco
name: Stancliffe, Richard J
name: Hoppe, Peter
Publisher: name: arXiv
Year: 2022
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Certain types of silicon carbide (SiC) grains, e.g., SiC-X grains, and low density (LD) graphites are C-rich presolar grains that are thought to have condensed in the ejecta of core-collapse supernovae (CCSNe). In this work we compare C, N, Al, Si, and Ti isotopic abundances measured in presolar grains with the predictions of 21 CCSN models. The impact of a range of SN explosion energies is considered, with the high energy models favouring the formation of a C/Si zone enriched in $^{12}$C, $^{28}$Si, and $^{44}$Ti. Eighteen of the 21 models have H ingested into the He-shell and different abundances of H remaining from such H-ingestion. CCSN models with intermediate to low energy (that do not develop a C/Si zone) cannot reproduce the $^{28}$Si and $^{44}$Ti isotopic abundances in grains without assuming mixing with O-rich CCSN ejecta. The most $^{28}$Si-rich grains are reproduced by energetic models when material from the C/Si zone is mixed with surrounding C-rich material, and the observed trends of the $^{44}$Ti/$^{48}$Ti and $^{49}$Ti/$^{48}$Ti ratios are consistent with the C-rich C/Si zone. For the models with H-ingestion, high and intermediate explosion energies allow the production of enough $^{26}$Al to reproduce the $^{26}$Al/$^{27}$Al measurements of most SiC-X and LD graphites. In both cases, the highest $^{26}$Al/$^{27}$Al ratio is obtained with H still present at $X_H \approx 0.0024$ in He-shell material when the SN shock is passing. The existence of H in the former convective He-shell points to late H-ingestion events in the last days before massive stars explode as a supernova.
Towards an ecological model for supporting teachers : a proposal for a study estimating the effect of a trauma-informed psychoeducational group intervention on reducing teacher stress
Creators: name: Bauer, Travis Duane
Publisher: name: The University of Texas at Austin
Year: 2019
Subjects: Teacher stress
Group work
Trauma
Trauma-informed care

description: Continued documentation of teacher stress among U.S. educators necessitates further research to meet their needs. Toxic stress—a debilitating stress response often triggered when exposed to effects of another’s trauma—has been identified as a driver for teacher stress, yet few researchers have conceptualized adequate interventions for them. The following proposal presents a trauma-informed psychoeducational group for secondary school teachers in Central Texas. Its purpose will be to examine the effect of trauma education on levels of stress, trauma awareness, and help-seeking among educators when compared to a control group. Paired t-tests will be used to determine any statistically significant differences between group means on outcome variables. Qualitative and quantitative analyses were used to examine results from a pilot version of the proposed study, the results of which are discussed in terms of future directions for trauma-informed group work with teachers
Galaxy populations in the most distant SPT-SZ clusters -- II. Galaxy structural properties in massive clusters at 1.4
Creators: name: Strazzullo, V.
name: Pannella, M.
name: Mohr, J. J.
name: Saro, A.
name: Ashby, M. L. N.
name: Bayliss, M. B.
name: Canning, R. E. A.
name: Floyd, B.
name: Gonzalez, A. H.
name: Khullar, G.
name: Kim, K. J.
name: McDonald, M.
name: Reichardt, C. L.
name: Sharon, K.
name: Somboonpanyakul, T.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We investigate structural properties of massive galaxy populations in the central regions of five very massive galaxy clusters at z~1.4-1.7 from the South Pole Telescope Sunyaev Zel'dovich effect survey. We probe the connection between galaxy structure and broad stellar population properties, at stellar masses log(M/Msun)>10.85. We find that quiescent and star-forming cluster galaxy populations are largely dominated by bulge- and disk-dominated sources, respectively, with relative contributions consistent with those of field counterparts. At the same time, the enhanced quiescent galaxy fraction observed in these clusters with respect to the coeval field is reflected in a significant morphology-density relation, with bulge-dominated galaxies clearly dominating the massive galaxy population in these clusters already at z~1.5. At face value, these observations show no significant environmental signatures in the correlation between broad structural and stellar population properties. In particular, the Sersic index and axis ratio distribution of massive, quiescent sources are consistent with field counterparts, in spite of the enhanced quiescent galaxy fraction in clusters. This consistency suggests a tight connection between quenching and structural evolution towards a bulge-dominated morphology, at least in the probed cluster regions and galaxy stellar mass range, irrespective of environment-related processes affecting star formation in cluster galaxies. We also probe the stellar mass vs. size relation of cluster galaxies, and find that star-forming and quiescent sources populate the mass-size plane in a manner largely similar to their field counterparts, with no evidence of a significant size difference for any probed sub-population. In particular, both quiescent and bulge-dominated cluster galaxies have average sizes at fixed stellar mass consistent with their counterparts in the field.
description: 17 pages, 10 figures, A&A in press
Non-linear Q-clouds around Kerr black holes
Creators: name: Herdeiro, Carlos
name: Radu, Eugen
name: Runarsson, Helgi
Publisher: name: arXiv
Year: 2014
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Q-balls are regular extended `objects' that exist for some non-gravitating, self-interacting, scalar field theories with a global, continuous, internal symmetry, on Minkowski spacetime. Here, analogous objects are also shown to exist around rotating (Kerr) black holes, as non-linear bound states of a test scalar field. We dub such configurations Q-clouds. We focus on a complex massive scalar field with quartic plus hexic self-interactions. Without the self-interactions, linear clouds have been shown to exist, in synchronous rotation with the black hole horizon, along 1-dimensional subspaces - existence lines - of the Kerr 2-dimensional parameter space. They are zero modes of the superradiant instability. Non-linear Q-clouds, on the other hand, are also in synchronous rotation with the black hole horizon; but they exist on a 2-dimensional subspace, delimited by a minimal horizon angular velocity and by an appropriate existence line, wherein the non-linear terms become irrelevant and the Q-cloud reduces to a linear cloud. Thus, Q-clouds provide an example of scalar bound states around Kerr black holes which, generically, are not zero modes of the superradiant instability. We describe some physical properties of Q-clouds, whose backreaction leads to a new family of hairy black holes, continuously connected to the Kerr family.
description: 11 pages, 4 figures
Benford's law predicted digit distribution of aggregated income taxes: the surprising conformity of Italian cities and regions
Creators: name: Mir, Tariq Ahmad
name: Ausloos, Marcel
name: Cerqueti, Roy
Publisher: name: arXiv
Year: 2014
Subjects: subject: Physics and Society (physics.soc-ph)
subject: General Finance (q-fin.GN)
subject: FOS: Physical sciences
subject: FOS: Economics and business

description: The yearly aggregated tax income data of all, more than 8000, Italian municipalities are analyzed for a period of five years, from 2007 to 2011, to search for conformity or not with Benford's law, a counter-intuitive phenomenon observed in large tabulated data where the occurrence of numbers having smaller initial digits is more favored than those with larger digits. This is done in anticipation that large deviations from Benford's law will be found in view of tax evasion supposedly being widespread across Italy. Contrary to expectations, we show that the overall tax income data for all these years is in excellent agreement with Benford's law. Furthermore, we also analyze the data of Calabria, Campania and Sicily, the three Italian regions known for strong presence of mafia, to see if there are any marked deviations from Benford's law. Again, we find that all yearly data sets for Calabria and Sicily agree with Benford's law whereas only the 2007 and 2008 yearly data show departures from the law for Campania. These results are again surprising in view of underground and illegal nature of economic activities of mafia which significantly contribute to tax evasion. Some hypothesis for the found conformity is presented.
description: 18 pages, 5 tables, 4 figures, 61 references, To appear in European Physical Journal B
An interregional, transdisciplinary and good practice-based approach for frailty: the mind&gait project
Creators: name: Apóstolo, Joao
name: Couto, Filipa
name: Bobrowicz-Campos, Elzbieta
name: Dixe, Maria A.
name: Ribeiro, Jaime
name: Braúna, Monica
name: Camacho, Timoteo
name: Santos-Rocha, Rita
name: Parreira, Pedro
name: Cruz, Armenio
name: Malça, Cândida
name: Dantas, Carina
name: Jegundo, Ana Luisa
name: Marcelino, Luis
name: Simões, Mara
name: Almeida, Maria
Publisher: name: Universita' degli Studi di Salerno
Year: 2019
Subjects: Ageing
Frailty
Cognitive stimulation
Physical exercise
Digital solutions
Technology transfer

description: Social facilities such residential structures and day-centres increasingly seek integrated, structured, adapted, creative, dynamic and economic strategies to prevent frailty. The arising need of an aged and frail population requires innovative interventions and products to prevent cognitive and physical decline. The interregional MIND&GAIT project aims to promote independent living in frail older adults by improving cognition and gait ability by using assistive products. This transdisciplinary strategy within a 24-months period expects as project’ deliverables: i) a structured and good practice-based combined intervention (CI) consisting of a cognitive stimulation programme and a physical exercise programme; ii) an auto-blocking mechanism for rolling walkers with biofeedback acquisition (ABMRW); iii) a randomized clinical trial to assess CI’ effectiveness; and iv) a web-platform to be used as a repository that will support and disseminate the intervention materials, covering the action-line of translational research. Positive benefits are expected in prevention and maintenance of frail older adults’ capacities. Preliminary results showed positive effects on the improvement of cognitive and physical functions, functionality and depressive symptomatology. The interregional geographical coverage induced by MIND&GAIT underlines the potential replicability of the project extension to the community in the Centro and Alentejo regions of Portugal. MIND&GAIT network supports actions and provides learning opportunities and emergence of locally-embedded support systems towards social innovation for older adults.
A Preferential Growth Channel for Supermassive Black Holes in Elliptical Galaxies at z<2
Creators: name: Farrah, Duncan
name: Petty, Sara
name: Croker, Kevin
name: Tarle, Gregory
name: Zevin, Michael
name: Hatziminaoglou, Evanthia
name: Shankar, Francesco
name: Wang, Lingyu
name: Clements, David L
name: Efstathiou, Andreas
name: Lacy, Mark
name: Nishimura, Kurtis A.
name: Afonso, Jose
name: Pearson, Chris
name: Pitchford, Lura K
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The assembly of stellar and supermassive black hole (SMBH) mass in elliptical galaxies since $z\sim1$ can help to diagnose the origins of locally-observed correlations between SMBH mass and stellar mass. We therefore construct three samples of elliptical galaxies, one at $z\sim0$ and two at $0.7\lesssim z \lesssim2.5$, and quantify their relative positions in the $M_{BH}-M_*$ plane. Using a Bayesian analysis framework, we find evidence for translational offsets in both stellar mass and SMBH mass between the local sample and both higher redshift samples. The offsets in stellar mass are small, and consistent with measurement bias, but the offsets in SMBH mass are much larger, reaching a factor of seven between $z\sim1$ and $z\sim0$. The magnitude of the SMBH offset may also depend on redshift, reaching a factor of $\sim20$ at $z\sim 2$. The result is robust against variation in the high and low redshift samples and changes in the analysis approach. The magnitude and redshift evolution of the offset are challenging to explain in terms of selection and measurement biases. We conclude that either there is a physical mechanism that preferentially grows SMBHs in elliptical galaxies at $z\lesssim 2$, or that selection and measurement biases are both underestimated, and depend on redshift.
description: ApJ, accepted
Constraining globular cluster formation through studies of young massive clusters - III. A lack of gas and dust in massive stellar clusters in the LMC and SMC
Creators: name: Bastian, Nate
name: Strader, Jay
Publisher: name: arXiv
Year: 2014
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Scenarios that invoke multiple episodes of star formation within young globular clusters (GCs) to explain the observed chemical and photometric anomalies in GCs, require that clusters can retain the stellar ejecta of the stars within them and accrete large amounts of gas from their surroundings. Hence, it should be possible to find young massive clusters in the local Universe that contain significant amounts ($>10$\%) of the cluster mass of gas and/or dust within them. Recent theoretical studies have suggested that clusters in the Large Magellanic Cloud (LMC) with masses in excess of $10^4$\msun\, and ages between $30$ and $\sim300$~Myr, should contain such gas reservoirs. We have searched for \hi\ gas within 12 LMC (and 1 SMC) clusters and also for dust using {\em Spitzer} 70\micron\ and 160\micron\ images. No clusters were found to contain gas and/or dust. While two of the clusters have \hi\ at the same (projected) position and velocity, the gas does not appear to be centred on the clusters, but rather part of nearby clouds or filaments, suggesting that the gas and cluster are not directly related. This lack of gas ($<1$\% of the stellar mass) is in strong tension with model predictions, and may be due to higher stellar feedback than has been previously assumed or due to the assumptions used in the previous calculations.
description: Accepted for publication in MNRAS, 8 pages, 5 figures
Nematic spin correlations in the tetragonal state of uniaxial strained BaFe2-xNixAs2
Creators: name: Lu, Xingye
name: Park, J. T.
name: Zhang, Rui
name: Luo, Huiqian
name: Nevidomskyy, Andriy H.
name: Si, Qimiao
name: Dai, Pengcheng
Publisher: name: arXiv
Year: 2014
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Understanding the microscopic origins of electronic phases in high-transition temperature (high-Tc) superconductors is important for elucidating the mechanism of superconductivity. In the paramagnetic tetragonal phase of BaFe2-xTxAs2 (where T is Co or Ni) iron pnictides, an in-plane resistivity anisotropy has been observed. Here we use inelastic neutron scattering to show that low-energy spin excitations in these materials change from four-fold symmetric to two-fold symmetric at temperatures corresponding to the onset of the in-plane resistivity anisotropy. Because resistivity and spin excitation anisotropies both vanish near optimal superconductivity, we conclude that they are likely intimately connected.
Laboratory rotational spectroscopy and astronomical search of ethynyl substituted naphthalene
Creators: name: Cabezas, Carlos
name: Peña, Isabel
name: Cernicharo, José
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The recent interstellar detection of cyanonaphthalenes bring interest in related aromatic molecular species that could be present in similar astronomical environments. In this context, ethynyl derivatives of naphthalene are promising candidates to be observed in the Taurus Molecular Cloud (TMC-1), where cyanonaphthalenes together with cyano- and ethynyl- derivatives of cyclopentadiene and benzene have been detected. To enable the interstellar searches for ethynyl derivatives of naphthalene, their pure rotational spectra need to be investigated in the laboratory. We have observed for the first time the rotational spectra of 1- and 2-ethynylnaphthalene species using a broadband Fourier-transform microwave spectrometer operating in the 2-8 GHz frequency region. Accurate spectroscopic parameters are derived from the analysis of the experimental spectra, allowing for reliable predictions for astronomical searches. Our searches in TMC-1 for both isomers provide upper limits for the abundances of these species.
description: Accepted 2022 December 13 in MNRAS
The BADC-CSV Format: Meeting user and metadata requirements
Creators: name: Parton, Graham A
name: Pepler, Sam
Publisher: name: Zenodo
Year: 2009
Subjects: data and information
BADC-CSV
metadata

description: The 2007 British Atmospheric Data Centre (BADC) Users Survey examined the skill base of the BADC's user
community. Results indicated a large proportion of users who were familiar with data held in ASCII formats
such as comma-separated variables (csv) and there was a high degree of familiarity with spreadsheet
programmes (e.g. Excel) for data analysis purposes. These result, combined with the experiences of the BADC
staff dealing with user enquiries and assisting data suppliers in preparing data for submission, and the metadata
requirements of the BADC, highlighted the need for a new ASCII format to be generated. The BADC-CSV
format adheres to metadata conventions covered by the NASA-Ames and netCDF formats, the CF and Dublin
Core metadata conventions, the ISO19115 standard and the metadata requirements of the BADC and its sister
data centres within the Natural Environment Research Council (NERC). The format meets end user and data
supplier requirements by being a native format for spreadsheet software as well as other commonly used data
production and analysis tools (e.g. IDL, MatLab). This paper presents the requirements for the format resulting
from the 2007 user survey and data centre requirements, describes the structure of the format and demonstrates
the format through short examples. Finally ongoing work to further develop the format is discussed.
description: Previously curated at: http://cedadocs.ceda.ac.uk/761/

Event type: workshop.

The publish date on this item was its original published date.

This item was previously associated with content (as an official url) at: http://www.tr32db.uni-koeln.de/workshop/acceptedPosters.php.

This work was funded by: Natural Environment Research Council (NERC).

This item was not refereed before the publication

Main files in this record:
Parton_Pepler_BADC-CSV_Format.pdf
cologne_badc_csv_presenation_v2.pptx

Item originally deposited with Centre for Environmental Data Analysis (CEDA) document repository by Dr Graham Parton. Transferred to CEDA document repository community on Zenodo on 2022-11-24