cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Molecular Gas Depletion and Starbursts in Luminous Infrared Galaxy Mergers
Creators: name: Gao, Yu
name: Solomon, Philip M.
Publisher: name: arXiv
Year: 1998
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Most luminous infrared galaxies (LIGs) are closely interacting/merging systems rich in molecular gas. We study here the relationship between the stage of the galaxy-galaxy interactions, the molecular gas mass, and the star formation rate as deduced from the infrared luminosity L_IR in LIGs. We find a correlation between the CO(1-0) luminosity (a measure of molecular mass M(H_2)) and the projected separation of merger nuclei (indicator of merging stages) in a sample of 50 LIG mergers, which shows that the molecular gas content decreases as merging advances. The starburst is due to enhanced star formation in pre-existing molecular clouds and not to the formation of more molecular clouds from HI. The molecular content is being rapidly depleted due to the starbursts as merging progresses. This is further supported by an anti-correlation between L_IR/M(H_2), the global measure of the star formation rate per unit gas mass, and the projected separation implying an enhanced star formation ``efficiency'' in late stage mergers compared to that of early mergers. This is the first evidence connecting the depletion of molecular gas with starbursts in interacting galaxies.
description: 14 pages, 2 postscript figures, to appear in ApJ Letters
Simulating Galaxy Evolution
Creators: name: Silk, Joseph
name: Bouwens, Rychard J.
Publisher: name: arXiv
Year: 1998
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The forwards approach to galaxy formation and evolution is extremely powerful but leaves several questions unanswered. Foremost among these is the origin of disks. A backwards approach is able to provide a more realistic treatment of star formation and feedback and provides a practical guide to eventually complement galaxy formation ab initio.
description: 11 pages with 2 figures, to appear in "After the Dark Ages: When Galaxies were Young", proceedings of the 9th annual October Astrophysics Conference, ed. S. Holt and E. Smith, simulated images available at http://astro.berkeley.edu/~bouwens/simulation.html
MOESM7 of Cycles of gene expression and genome response during mammalian tissue regeneration
Creators: name: Rib, Leonor
name: Villeneuve, Dominic
name: Shilpi Minocha
name: Praz, Viviane
name: Hernandez, Nouria
name: Guex, Nicolas
name: Winship Herr
Publisher: name: figshare
Year: 2018
Subjects: subject: Biophysics
subject: Biochemistry
subject: Microbiology
subject: FOS: Biological sciences
subject: Cell Biology
subject: Genetics
subject: Molecular Biology
subject: Neuroscience
subject: Physiology
subject: Evolutionary Biology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Developmental Biology
subject: Marine Biology
subject: Cancer
subject: 110309 Infectious Diseases
subject: FOS: Health sciences
subject: Computational Biology

description: Additional file 7: Figure S4. Pol II, H3K36me2 and H3K36me3 densities at 60 h post-PH for the Cebpa gene. (A) Genomic view of the Cebpa gene. Densities of the central 50 bp of paired-end reads for Pol II (pink), H3K36me3 (dark blue) and H3K36me2 (light blue) ChIP fragments are shown for 60 h post-PH. Similarly, input fragments at 60 h post-PH are shown.
Predicted HST FOC and broad band colours for young and intermediate Simple Stellar Populations
Creators: name: Brocato, E.
name: Castellani, V.
name: Raimondo, G.
name: Romaniello, M.
Publisher: name: arXiv
Year: 1998
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: This paper presents theoretical HST and broad band colours from population synthesis models based on an homogeneous set of stellar evolutionary tracks as computed under canonical (no overshooting) assumptions, covering the range of cluster ages from t=8 Myr to t=5 Gyr for three different metallicities (Z=0.02, 0.006, and 0.001). Statistical fluctuations in the cluster population have been investigated, assessing the predicted fluctuations of the various colours as a function of the cluster integrated absolute magnitude. We show that the red leak in HST UV filters deeply affects the predicted fluxes and colours. However, we find that for F152M-F307M < 0.5 and for F170M-F278M < 0.5 (which means ages lower than 1 Gyr) the HST UV colours can still be used to infer reliable indications on the age of distant clusters. Moreover, one finds that the age calibration of these colours is scarcely affected by the amount of original helium or by the assumed IMF. On this basis, we present a calibration of the HST UV two-colours (F152M-F307M vs F170M-F278M) in terms of cluster ages for the three above quoted metallicities. We suggest the combined use of HST UV colours and IR colours (V-K in particular) to disentangle the metallicity-age effect in integrated colours of young stellar populations (t< 1 Gyr).
description: Latex 18 pages, 16 encapsulated figures, 6 tables, A&ASS accepted
An auto-titrating (intelligent) oxygen system in patients with chronic respiratory failure
Creators: name: Moghal, Mohammad Ehsan Ul-Haq
Publisher: name: Imperial College London
Year: 2017

description: Long-term oxygen therapy (LTOT) improves survival in patients with chronic obstructive pulmonary disease (COPD) and chronic hypoxaemia with international guidelines recommending LTOT for patients with chronic hypoxaemia secondary to respiratory failure. LTOT is prescribed at a fixed-flow rate aiming to maintain the partial pressure of oxygen ≥8 kilopascals or oxygen saturations (SpO2) >90% at rest. However, many patients on domiciliary LTOT continue to experience episodes of intermittent hypoxia (SpO2 <90%) during rest, exercise, activities of daily living (ADL) and sleep with the potentially harmful consequences of arrhythmias, ischaemic heart disease, transient increases in pulmonary pressures and reduced cerebral oxygenation. The aim of this thesis was to explore whether a novel smartphone based auto-titrating oxygen system (the intelligent oxygen therapy system [iO2Ts]), could reduce intermittent hypoxia by delivering variable flow oxygen to maintain a pre-set SpO2 target during various activities which typically take place over a period of 24 hours. In the first study, the iO2Ts significantly reduced intermittent hypoxia compared to ambulatory oxygen in patients with COPD on LTOT during a 6-minute walk test (6MWT). The second study showed that the iO2Ts is equivalent to ambulatory oxygen in reducing intermittent hypoxia during a 6MWT in patients with interstitial lung disease (a group of patients who rapidly desaturate on exercise). The third study showed that the iO2Ts reduced intermittent hypoxia during ADL in patients on LTOT compared to usual LTOT. In a fourth pilot study, the iO2Ts maintained oxygenation as well as usual LTOT and did not change transcutaneous carbon dioxide levels compared to LTOT during sleep. In summary, this thesis has shown that the iO2Ts can reduced intermittent hypoxia in patients on LTOT during various activities which typically take place over 24 hours. The reduction in intermittent hypoxia could optimise domiciliary and ambulatory oxygen for patients on LTOT.
Exploring complex ecological patterns in hyper-diverse tropical canopy arthropod communities using modern genetic technologies
Creators: name: Creedy, Thomas
Publisher: name: Imperial College London
Year: 2017

description: The canopy arthropod community in tropical montane cloud forests has rarely achieved research attention, but this remote, diverse community is likely under considerable threat from climate change. Modern techniques are synthesised in this thesis to investigate this community. Accurate climate knowledge is necessary for any climate change research, and this thesis utilises current and predicted climate data to aid in sampling, and validates these data using ground-truthed measurements. Modern molecular ecology techniques enable high-taxonomic-resolution studies such as this, but the pipelines need careful validation: this thesis presents an empirical study to examine biases in metabarcoding, new tools for easy validation of bioinformatic pipelines, and discusses taxonomic assignment of anonymous sequences. A new canopy sampling design is employed to sample canopy arthropods in two tree species in a rainforest, and metabarcoding is successfuly used to uncover high levels of spatial turnover and phylobetadiversity across a highly heterogenous landscape in a spatially explicit nested study.
First model independent results from DAMA/LIBRA-phase2
Creators: name: Bernabei, R.
name: Belli, P.
name: Bussolotti, A.
name: Cappella, F.
name: Caracciolo, V.
name: Cerulli, R.
name: Dai, C. J.
name: d'Angelo, A.
name: Di Marco, A.
name: He, H. L.
name: Incicchitti, A.
name: Ma, X. H.
name: Mattei, A.
name: Merlo, V.
name: Montecchia, F.
name: Sheng, X. D.
name: Ye, Z. P.
Publisher: name: arXiv
Year: 2018
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: The first model independent results obtained by the DAMA/LIBRA-phase2 experiment are presented. The data have been collected over 6 annual cycles corresponding to a total exposure of 1.13 ton $\times$ yr, deep underground at the Gran Sasso National Laboratory (LNGS) of the I.N.F.N. The DAMA/LIBRA-phase2 apparatus, $\simeq$ 250 kg highly radio-pure NaI(Tl), profits from a second generation high quantum efficiency photomultipliers and of new electronics with respect to DAMA/LIBRA-phase1. The improved experimental configuration has also allowed to lower the software energy threshold. New data analysis strategies are presented. The DAMA/LIBRA-phase2 data confirm the evidence of a signal that meets all the requirements of the model independent Dark Matter (DM) annual modulation signature, at 9.5 $σ$ C.L. in the energy region (1-6) keV. In the energy region between 2 and 6 keV, where data are also available from DAMA/NaI and DAMA/LIBRA-phase1 (exposure $1.33$ ton $\times$ yr, collected over 14 annual cycles), the achieved C.L. for the full exposure (2.46 ton $\times$ yr) is 12.9 $σ$; the modulation amplitude of the single-hit scintillation events is: $(0.0103 \pm 0.0008)$ cpd/kg/keV, the measured phase is $(145 \pm 5)$ days and the measured period is $(0.999 \pm 0.001)$ yr, all these values are well in agreement with those expected for DM particles. No systematics or side reaction able to mimic the exploited DM signature (i.e. to account for the whole measured modulation amplitude and to simultaneously satisfy all the requirements of the signature), has been found or suggested by anyone throughout some decades thus far.
description: 28 pages, 17 figures, 5 tables. In press on Journal Nucl. Phys. and Atomic Energy. arXiv admin note: substantial text overlap with arXiv:1308.5109, arXiv:1002.1028, arXiv:1306.1411
Bayesian Active Learning for Discrete Latent Variable Models
Creators: name: Jha, Aditi
name: Ashwood, Zoe C.
name: Pillow, Jonathan W.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Machine Learning (cs.LG)
subject: Neurons and Cognition (q-bio.NC)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences
subject: FOS: Biological sciences

description: Active learning seeks to reduce the amount of data required to fit the parameters of a model, thus forming an important class of techniques in modern machine learning. However, past work on active learning has largely overlooked latent variable models, which play a vital role in neuroscience, psychology, and a variety of other engineering and scientific disciplines. Here we address this gap by proposing a novel framework for maximum-mutual-information input selection for discrete latent variable regression models. We first apply our method to a class of models known as "mixtures of linear regressions" (MLR). While it is well known that active learning confers no advantage for linear-Gaussian regression models, we use Fisher information to show analytically that active learning can nevertheless achieve large gains for mixtures of such models, and we validate this improvement using both simulations and real-world data. We then consider a powerful class of temporally structured latent variable models given by a Hidden Markov Model (HMM) with generalized linear model (GLM) observations, which has recently been used to identify discrete states from animal decision-making data. We show that our method substantially reduces the amount of data needed to fit GLM-HMM, and outperforms a variety of approximate methods based on variational and amortized inference. Infomax learning for latent variable models thus offers a powerful for characterizing temporally structured latent states, with a wide variety of applications in neuroscience and beyond.
description: 38 pages (including references and an appendix), 7 figures in main text
title: ADCO, Cartulaire de l'abbaye de Cîteaux dit Cartulare Antiquum t.1 (début XIIIe siècle), Cart. 166 (11 H 64), 136 folios, f. 0023r
Creators: name: de la Côte d'Or, Archives départementales
name: Archives Départementales De La Côte-D'Or
name: Petot, Frédérique
name: Projet CBMA
name: CG21/F.PETOT/2012
name: Petot, Frédéric
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2020
Subjects: subject: Corpus Burgundiae Medii Aevi
subject: Chartes de la Bourgogne du Moyen Âge
subject: LaMOP
subject: Laboratoire de Médiévistique Occidentale de Paris
subject: cartulaire

description: Cartulaire de l'abbaye de Cîteaux dit Cartulare Antiquum t.1 (début XIIIe siècle), Archives départementales de la Côte-d'Or, Cart. 166 (11 H 64), 136 folios, f. 0023r, Numérisation en mode image.
description: Relation: http://www.cbma-project.eu/
description: Bibliographic citation: Cartulaire de l'abbaye de Cîteaux dit Cartulare Antiquum t.1 (début XIIIe siècle), Archives départementales de la Côte-d'Or, Cart. 166 (11 H 64), 136 folios, f. 0023r, in Projet CBMA - Corpus Burgundiae Medii Aevi [Ressource en ligne], https:// manuscrits.cbma-project.eu/
description: Provenance: abbaye de Cîteaux
description: Provenance: http://www.wikidata.org/entity/Q843261
description: Provenance: https://www.geonames.org/3024876
description: Provenance: http://www.idref.fr/030974844/id
description: Provenance: https://catalogue.bnf.fr/ark:/12148/cb12228351v
Electromagnetic couplings of radially excited light vector mesons from QCD sum rules
Creators: name: Afonin, S. S.
name: Solomko, T. D.
Publisher: name: arXiv
Year: 2018
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The couplings of unflavored vector mesons to the $e^+e^-$ annihilation are an important source of information on the nature and structure of these resonances which play a prominent role in the hadron phenomenology. The couplings of many radially excited heavy vector mesons are measured, while the corresponding couplings for light vector mesons are not known. We propose a phenomenological method allowing to estimate these unknown couplings. The method is suggested by our observation that the electromagnetic coupling of the $n$-th radial excitation of $S$-wave heavy vector meson decouples from the $e^+e^-$ annihilation with nearly exponential rate with $n$. It becomes natural to assume that the same effect takes place in the light vector mesons and this would allow to estimate the unknown couplings. We tested this assumption with the help of a generalized version of borelized QCD spectral sum rules saturated by a linear radial trajectory of meson states taken from the phenomenology. This leads to a consistent setup which is able to predict the decoupling rate. The calculated rate turned out to be almost the same as in the heavy vector mesons. Our result may be interpreted as an effective account for non-trivial electromagnetic formfactor in meson decays to $e^+e^-$, thus looking beyond the large-$N_c$ limit. On the one hand, we argue that the given decoupling does not necessary contradict to the previous large-$N_c$ results for the Regge like meson spectra.
description: 18 pages, 4 figures, matches the published version
Gas-Rich Local Dwarf Star-Forming Galaxies and their connection with the Distant Universe
Creators: name: Kunth, Daniel
Publisher: name: arXiv
Year: 1998
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: I discuss the properties of gas-rich forming galaxies. I particularly emphasize the latest results on Lyman alpha emission that are relevant to the search of distant young galaxies. The interdependance of the Lyman alpha escape with the properties of the ISM in starburst galaxies is outlined. A new model from G. Tenorio-Tagle and his collaborators explaining Lyman alpha profiles in starburst galaxies from the hydrodynamics of superbubbles powered by massive stars is presented. I stress again that since Lyman alpha is primarely a diagnostic of the ISM, it is mandatory to understand how the ISM and Lyman alpha are related to firmly relate Lyman alpha to the cosmic star-formation rate.
description: To appear in the proceedings of the Meudon Conference: "Galactic Evolution: Connecting the distant universe with the local fossil record
Approximation Algorithms for Complex-Valued Ising Models on Bounded Degree Graphs
Creators: name: Mann, Ryan L.
name: Bremner, Michael J.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Quantum Physics (quant-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Computational Complexity (cs.CC)
subject: Data Structures and Algorithms (cs.DS)
subject: Combinatorics (math.CO)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: We study the problem of approximating the Ising model partition function with complex parameters on bounded degree graphs. We establish a deterministic polynomial-time approximation scheme for the partition function when the interactions and external fields are absolutely bounded close to zero. Furthermore, we prove that for this class of Ising models the partition function does not vanish. Our algorithm is based on an approach due to Barvinok for approximating evaluations of a polynomial based on the location of the complex zeros and a technique due to Patel and Regts for efficiently computing the leading coefficients of graph polynomials on bounded degree graphs. Finally, we show how our algorithm can be extended to approximate certain output probability amplitudes of quantum circuits.
description: 12 pages, 0 figures, published version
The impact behaviour of high performance fibre composites
Creators: name: Syed Abdullah, Syed Idros Bin
Publisher: name: Imperial College London
Year: 2018

description: The use of composite materials as structural reinforcements has increased significantly throughout the years. In aircraft structures, composite materials have replaced conventional materials such as aluminium to more than 50% of the aircraft's total mass. The advantages of composite materials include a high strength-to-weight ratio, and corrosion resistance. This has attracted designers to utilise these materials to enable a more cost effective design, without compromising the aircraft's structural integrity. However, composite materials are highly vulnerable to transverse impact loading. The need to improve their impact resistance is essential to achieve a more reliable and safer design. The research presented in this PhD aims to investigate the impact performance of laminated composites, both in low and high-velocity regimes. The investigation involves impact loading on three different fibre composites, namely Carbon fibre (IM7), Glass fibre (S2-Glass), and Thermotropic Liquid Crystal Polymer (Vectran), in a thermosetting epoxy matrix. Prior to this, all three laminates were characterised to obtain their in-plane mechanical properties, as well as the Mode I and II interlaminar fracture toughness. For the Vectran composite, the Mode I translaminar (fibre tensile) response was characterised to obtain its strain energy release rate, Gc, as well as understanding the complex failure mechanisms which contribute to its fracture toughness. All experimentally obtained properties were used for numerical modelling using the non-linear explicit Finite Element Method (FEM) software, LS-Dyna. Finally, an energy-based plane-stress User MATerial (UMAT) model was developed for the Vectran composite. The UMAT was used to simulate the in-plane, as well as the low and high velocity impact response of the Vectran composite. For carbon and glass composites, the commercially available energy-based material model in LS-Dyna was utilised to numerically reproduce the experimentally obtained impact response.
title: Three-particle quantization condition in a finite volume: 2. General formalism and the analysis of data
Creators: name: Hammer, Hans-Werner
name: Pang, Jin-Yi
name: Rusetsky, Akaki
Publisher: name: Springer
Year: 2022

description: We derive the three-body quantization condition in a finite volume using an effective field theory in the particle-dimer picture. Moreover, we consider the extraction of physical observables from the lattice spectrum using the quantization condition. To illustrate the general framework, we calculate the volume-dependent three-particle spectrum in a simple model both below and above the three-particle threshold. The relation to existing approaches is discussed in detail.
Estimation of the plenoptic function from a swiped image
Creators: name: Lawson, Michael Yee-Ming Chong
Publisher: name: Imperial College London
Year: 2018

description: The image blurring that results from moving a camera whilst the shutter is open is normally regarded as undesirable. However, the blurring of the images contains hidden information which can be extracted to give information about the captured scene. Information encapsulated within this blur allows the light rays present within the scene to be recovered. Given the correct recovery of the light rays that form a blurred image, a sharp image of the scene can be generated for an arbitrary camera location. Therefore, rather than resharpening an image with motion blur, the goal of the work contained within this thesis is to recover the light rays within the scene Recovery of the light rays within the scene is achieved by using a layer based model to represent objects within the scene as planes at discrete depths, and by using an extension to the level set method, to segment the blurred image into planes at different depths. Knowledge of the layer boundaries is then used to recover the surfaces of the layers, and hence a model of the scene in three dimensions. The algorithm described in this thesis has been successfully tested on real and synthetic images constructed from fronto-parallel planes, with the scene being recovered accurately from all positions within the original path of the camera.
Loxia Linnaeus, 1758, gen. nov.
Creators: name: Linnaeus, Carolus
Publisher: name: Laurentius Salvius
Year: 1758
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Aves
Passeriformes
Fringillidae
Loxia

description: Loxia [gen. nov.]
Rostrum conico-gibbum, fronte subcalvum: Mandibula inferior margine laterali inflexa.
Nares in basi rostri.
Lingua integra.
description: Published as part of Linnaeus, Carolus, 1758, Systema Naturae per regna tria naturae: secundum classes, ordines, genera, species, cum characteribus, differentiis, synonymis, locis, Stockholm :Laurentius Salvius on page 171, DOI: 10.5962/bhl.title.542, http://zenodo.org/record/3922206
The Luminosity Function of Omega Centauri
Creators: name: De Marchi, Guido
Publisher: name: arXiv
Year: 1998
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Deep HST-WFPC2 observations of the stellar population in the globular cluster Omega Cen (NGC 5139) have been used to measure the luminosity function of main sequence stars at the low-mass end. Two fields have been investigated, located respectively ~4.6' and ~7' away from the cluster center, or near the half-light radius of this cluster (~4.8'). The color-magnitude diagrams derived from these data show the cluster main sequence extending to the detection limit at I ~ 24. Information on both color and magnitude is used to build the luminosity functions of main sequence stars in these fields and the two independent determinations are found to agree very well with each other within the observational uncertainty. Both functions show a peak in the stellar distribution around M_I ~ 9 followed by a drop at fainter magnitudes well before photometric incompleteness becomes significant, as is typical of other globular clusters observed with the HST. This result is at variance with previous claims that the luminosity function of Omega Cen stays flat at low masses, but is in excellent agreement with recent near-IR NICMOS observations of the same cluster.
description: To appear in The Astronomical Journal. Contains 7 pages, 4 figures, prepared with the AAS LaTeX macro
Production of three isolated photons in the parton Reggeization approach at high energies
Creators: name: Karpishkov, Anton
name: Saleev, Vladimir
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study a large-$p_T$ three-photon production in proton-proton collisions at the LHC. We use the leading order (LO) approximation of the parton Reggeization approach consistently merged with the next-to-leading order corrections originated from the emission of additional jet. For numerical calculations we use the parton-level generator KaTie and modified KMR-type unintegrated parton distribution functions which satisfy exact normalization conditions for arbitrary $x$. We compare our prediction with data from ATLAS collaboration at the center-of-mass energy $\sqrt{s}=8$ TeV. We find that the inclusion of the real next-to-leading-order corrections leads to a good agreement between our predictions and data with the same accuracy as for the next-to-next-to-leading calculations based on the collinear parton model of QCD. At higher energies ($\sqrt{s}=13$ and 27 TeV) parton Reggeization approach predicts larger cross sections, up to $\sim 15$ \% and $\sim 30$ \%, respectively.
description: 22 pages, 6 figures, 2 tables
On the system of sets of lengths and the elasticity of submonoids of a finite-rank free commutative monoid
Creators: name: Gotti, Felix
Publisher: name: arXiv
Year: 2018
Subjects: subject: Commutative Algebra (math.AC)
subject: FOS: Mathematics
subject: 20M13 (Primary), 20M14, 20M05 (Secondary)

description: Let $H$ be an atomic monoid. For $x \in H$, let $\mathsf{L}(x)$ denote the set of all possible lengths of factorizations of $x$ into irreducibles. The system of sets of lengths of $H$ is the set $\mathcal{L}(H) = \{\mathsf{L}(x) \mid x \in H\}$. On the other hand, the elasticity of $x$, denoted by $ρ(x)$, is the quotient $\sup \mathsf{L}(x)/\inf \mathsf{L}(x)$ and the elasticity of $H$ is the supremum of the set $\{ρ(x) \mid x \in H\}$. The system of sets of lengths and the elasticity of $H$ both measure how far is $H$ from being half-factorial, i.e., $|\mathsf{L}(x)| = 1$ for each $x \in H$. Let $\mathcal{C}$ denote the collection comprising all submonoids of finite-rank free commutative monoids, and let $\mathcal{C}_d = \{H \in \mathcal{C} \mid \text{rank}(H) = d\}$. In this paper, we study the system of sets of lengths and the elasticity of monoids in $\mathcal{C}$. First, we construct for each $d \ge 2$ a monoid in $\mathcal{C}_d$ having extremal system of sets of lengths. It has been proved before that the system of sets of lengths does not characterize (up to isomorphism) monoids in $\mathcal{C}_1$. Here we use our construction to extend this result to $\mathcal{C}_d$ for any $d \ge 2$. On the other hand, it has been recently conjectured that the elasticity of any monoid in $\mathcal{C}$ is either rational or infinite. We conclude this paper by proving that this is indeed the case for monoids in $\mathcal{C}_2$ and for any monoid in $\mathcal{C}$ whose corresponding convex cone is polyhedral.
description: 19 pages
Davis-Greenstein alignment of oblate spheroidal grains
Creators: name: Roberge, W. G.
name: Lazarian, A.
Publisher: name: arXiv
Year: 1998
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present extensive calculations on the efficiency of grain alignment by the Davis-Greenstein mechanism. We model the grains as oblate spheroids with arbitrary axis ratios. Our description of the grain dynamics includes (i) magnetic dissipation and the inverse process driven by thermal fluctuations in the grain magnetization; (ii) gas-grain collisions and thermal evaporation of molecules from the grain surface; (iii) the transformation of rotational energy into heat by the Barnett effect and the inverse process driven by thermal fluctuations; and (iv) rapid Larmor precession of the grain angular momentum about the interstellar magnetic field. For ordinary paramagnetic grains, we calculate the Rayleigh reduction factor, R, for more than 1000 combinations of the 3 dimensionless parameters which characterise the alignment. For superparamagnetic grains, we calculate R from an exact analytic solution for the relevant distribution function. We calibrate the accuracy of a recently-proposed perturbative approximation and show that it yields R values with a mean error of about 17 percent.
description: 55 pp, AAS macros v4.0, to appear in MNRAS
Accessibility implementation at five years: a School of Nursing impact survey
Creators: name: Echeles, Justi
name: Taha, Asma
Publisher: name: Oregon Health and Science University
Year: 0
Subjects: subject: Diversity, Equity, Inclusion
subject: accessibility
subject: universal design for learning (UDL)

description: For over five years, OHSU School of Nursing (SON) has invested in accessibility training, resources, and professional development especially tailored for faculty, aimed at creating universally-designed online, hybrid, and technology-enhanced courses. The primary objective is to enhance access and meet the diverse needs of all learners, including those with disabilities. This quality improvement study seeks to explore the successes, barriers, and potential impact of accessibility training, thereby addressing the overarching question of the initiative's effectiveness.
Random walks on the circle and Diophantine approximation
Creators: name: Berkes, Istvan
name: Borda, Bence
Publisher: name: arXiv
Year: 2022
Subjects: subject: Probability (math.PR)
subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 60J05, 60G50, 11K38, 11K60

description: Random walks on the circle group $\mathbb{R}/\mathbb{Z}$ whose elementary steps are lattice variables with span $α\not\in \mathbb{Q}$ or $p/q \in \mathbb{Q}$ taken mod $\mathbb{Z}$ exhibit delicate behavior. In the rational case we have a random walk on the finite cyclic subgroup $\mathbb{Z}_q$, and the central limit theorem and the law of the iterated logarithm follow from classical results on finite state space Markov chains. In this paper we extend these results to random walks with irrational span $α$, and explicitly describe the transition of these Markov chains from finite to general state space as $p/q \to α$ along the sequence of best rational approximations. We also consider the rate of weak convergence to the stationary distribution in the Kolmogorov metric, and in the rational case observe a surprising transition from polynomial to exponential decay after $\approx q^2$ steps; this seems to be a new phenomenon in the theory of random walks on compact groups. In contrast, the rate of weak convergence to the stationary distribution in the total variation metric is purely exponential.
description: 36 pages
title: ADCO, Sixième cartulaire de Saint-Étienne de Dijon (1662), Cart. 30 (G 133), 441 folios, f. 018
Creators: name: de la Côte d'Or, Archives départementales
name: Petot, Frédéric
name: Archives Départementales De La Côte-D'Or
name: Petot, Frédérique
name: Projet CBMA
name: CG21/F.PETOT/2012
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2020
Subjects: subject: Laboratoire de Médiévistique Occidentale de Paris
subject: Corpus Burgundiae Medii Aevi
subject: Chartes de la Bourgogne du Moyen Âge
subject: cartulaire
subject: LaMOP

description: Sixième cartulaire de Saint-Étienne de Dijon (1662), Archives départementales de la Côte-d'Or, Cart. 30 (G 133), 441 folios, f. 018, Numérisation en mode image.
description: Relation: http://www.cbma-project.eu/
description: Bibliographic citation: Sixième cartulaire de Saint-Étienne de Dijon (1662), Archives départementales de la Côte-d'Or, Cart. 30 (G 133), 441 folios, f. 018, in Projet CBMA - Corpus Burgundiae Medii Aevi [Ressource en ligne], https://manuscrits.cbma-project.eu/
description: Provenance: abbaye Saint-Étienne de Dijon
description: Provenance: http://www.wikidata.org/entity/Q15945019
The generation of 3D mineralised implants using human induced pluripotent stem cells for bone tissue engineering applications
Creators: name: MacFarlane, Robert
Publisher: name: Imperial College London
Year: 2018

description: The management of critical size bone defects due to the effects of arthritis, arthroplasty surgery, or complex trauma is a challenging problem for orthopaedic surgeons. Traditional methods of autologous bone grafting or allografting, although often successful, are associated with a number of disadvantages and a range of complications, such as, limited tissue availability, donor site pain, lack of osteoinductive capacity, and variable clinical outcomes. Bone tissue engineering, using stem cells combined with a 3 dimensional (3D) delivery system to fill bone defects, is an exciting area of research with promising early results. This study takes this concept further with the production of novel 3D cellular based implants produced in hydrogels in a bioreactor using human induced pluripotent stem cells (hiPSCs). The aims of this project were to culture and differentiate hiPSCs towards and osteogenic lineage in vitro in both 2D and 3D environments, study the optimum culture conditions for osteogenesis, investigate various pharmacological agents for their ability to enhance osteogenesis, and to produce 3D mineralised cellular implants containing differentiated stem cells of an osteogenic lineage, and ultimately observe the ability of the implants to create novel bone tissue with a view to in vivo translation. hiPSCs were cultured in 2D tissue culture plates and differentiated using a 2-step integrated mesodermal and osteogenic induction strategy. The osteogenic effects of 2 statins, simvastatin and atorvastatin, and several commercially available anti-osteoporotic agents including strontium ranelate and teriparatide, were assessed for their comparative ability to enhance osteogenesis in hiPSCs. In a 3D culture system using calcium alginate bio-hydrogel encapsulation of hiPSCs, placed within a rotating wall bioreactor to achieve maximum cellular expansion, with pharmacological osteogenic induction/ enhancement using statins or teriparatide, 3D mineralised bone tissue constructs were subsequently produced. Tissue characterisation with histological staining, scanning electron microscopy (SEM), and tissue mineralisation and functionality, and osteogenic gene expression, was demonstrated. This study provides evidence for the use of hiPSCs as a patient-derived cell source with the potential for 3D osteogenic tissue production using pharmacological enhancement with statins or teriparatide, and the potential for clinical translation for patients with conditions characterised by bone loss.
Phenomenological modelling of the fission yeast cell cycle based on multi-dimensional single-cell phenotypic data across growth conditions
Creators: name: Ficorella, Lorenzo
Publisher: name: Imperial College London
Year: 2018

description: Cell populations achieve size homoeostasis by coordinating cell growth and division. Direct (sizer) or indirect (adder, timer) models of size regulation have been proposed. Early experiments from 1970s showed that fission yeast implements an almost perfect sizer, whereas more recent data hint at looser regulation. It is unclear whether external conditions can affect regulation stringency and putative additional internal thresholds or timers regulating cell cycle progression. Moreover, it is currently unclear what causes different size heterogeneity levels observed by varying experimental conditions. In this work, I implemented an experimental and computational pipeline to investigate the aforementioned points. First, I created a cell cycle reporter strain and devised an imaging pipeline for analysing cells images, which I employed for acquiring high-throughput phenotypic data on cells grown in different experimental conditions (nitrogen sources). Second, I wrote cell cycle models and optimization scripts for extracting additional dynamic information from static experimental data, e.g. regarding cell size regulation. Apart from confirming that fission yeast adopts an imperfect sizer mechanism (at the G2/M transition), I unexpectedly observed that sizer stringency increases in faster-growing populations and is responsible for the reduction in heterogeneity of cell length at division. I also found that a constant adder regulates G1 elongation and a timer determines S duration. Fission yeast cells elongate asymmetrically; I found that elongation asymmetry depends on growth rate and on the stage in which cells divided. I also observed the presence of slower growing subpopulations, whose rate ranges between 15-40% of the overall growth rate and whose abundance increases in least favourable conditions. Finally, I found that the duration of the non-elongating phase between mitosis and cell division depends on growth rate, as well as the duration of cell cycle stages in the elongating phase and the duration of the mitotic phase.
A dwarf irregular galaxy at the edge of the Local Group: Stellar populations and distance of IC 5152
Creators: name: Zijlstra, Albert A.
name: Minniti, Dante
Publisher: name: arXiv
Year: 1998
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We have obtained V and I-band photometry for about 700 stars in the field of the dwarf irregular galaxy IC 5152, previously considered a possible member of the Local Group. Deep VI color-magnitude diagrams are presented of the main body of this galaxy and of a nearby field. We infer a distance by comparison with the VI color-magnitude diagrams of similar galaxies and with theoretical isochrones. The distance modulus to IC 5152 is found to be m-Mo = 26.15 +/- 0.2, adopting E(V-I) = 0. This distance of D=1.7 Mpc implies that IC 5152 is not a certain member of the Local Group. We also construct a deep optical luminosity function. By comparison with theoretical isochrones, we find a metallicity Z of approximately 0.002, which is lower than previous estimates. Using this metallicity and distance, IC 5152 now fits the metallicity-luminosity relation for dwarf galaxies. The youngest stars in the field studied have an age of ~10^7 Gyr, and there is a substantial population of stars with log t>7.8-8 yr. The central region of IC 5152 is an active site of star formation, as found by comparing our optical photometry with Hubble Space Telescope ultraviolet images. Several candidate globular clusters are found, as well as a candidate for a potential nucleus.
description: 27 pages, Latex, 12 figures. The Astronomical Journal, accepted for publication
GRB Redshift Distribution is Consistent with GRB Origin in Evolved Galactic Nuclei
Creators: name: Dokuchaev, V. I.
name: Eroshenko, Yu. N.
name: Ozernoy, L. M.
Publisher: name: arXiv
Year: 1998
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Recently we have elaborated a new cosmological model of gamma-ray burst (GRB) origin (1998, ApJ 502, 192), which employs the dynamical evolution of central dense stellar clusters in the galactic nuclei. Those clusters inevitably contain a large fraction of compact stellar remnants (CSRs), such as neutron stars (NSs) and stellar mass black holes (BHs), and close encounters between them result in radiative captures into short-living binaries, with subsequent merging of the components, thereby producing GRBs (typically at large distances from the nucleus). In the present paper, we calculate the redshift distribution of the rate of GRBs produced by close encounters of NSs in distant galactic nuclei. To this end, the following steps are undertaken: (i) we establish a connection between the parameters of the fast evolving central stellar clusters (i.e. those for which the time of dynamical evolution exceeds the age of the Universe) with masses of the forming central supermassive black holes (SMBHs) using a dynamical evolution model; (ii) we connect these masses with the inferred mass distributions of SMBHs in the galactic nuclei and the redshift distribution of quasars by assuming a certain `Eddington luminosity phase' in their activity; (iii) we incorporate available observational data on the redshift distribution of quasars as well as a recently found correlation between the masses of galaxies and their central SMBHs. The resulting redshift distribution of the GRB rate, which accounts for both fast and slowly evolving galactic nuclei is consistent with that inferred from the BATSE data if the fraction of fast evolving galactic nuclei is in the range $0.016-0.16$.
description: LaTeX, 4 pages (incl. 1 figure), to appear in "After the Dark Ages: When Galaxies Were Young (the Universe at 2
Moments of random matrices and hypergeometric orthogonal polynomials
Creators: name: Cunden, Fabio Deelan
name: Mezzadri, Francesco
name: O'Connell, Neil
name: Simm, Nick
Publisher: name: arXiv
Year: 2018
Subjects: subject: Mathematical Physics (math-ph)
subject: Classical Analysis and ODEs (math.CA)
subject: Complex Variables (math.CV)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We establish a new connection between moments of $n \times n$ random matrices $X_n$ and hypergeometric orthogonal polynomials. Specifically, we consider moments $\mathbb{E}\mathrm{Tr} X_n^{-s}$ as a function of the complex variable $s \in \mathbb{C}$, whose analytic structure we describe completely. We discover several remarkable features, including a reflection symmetry (or functional equation), zeros on a critical line in the complex plane, and orthogonality relations. An application of the theory resolves part of an integrality conjecture of Cunden et al. [F. D. Cunden, F. Mezzadri, N. J. Simm and P. Vivo, J. Math. Phys. 57 (2016)] on the time-delay matrix of chaotic cavities. In each of the classical ensembles of random matrix theory (Gaussian, Laguerre, Jacobi) we characterise the moments in terms of the Askey scheme of hypergeometric orthogonal polynomials. We also calculate the leading order $n\to\infty$ asymptotics of the moments and discuss their symmetries and zeroes. We discuss aspects of these phenomena beyond the random matrix setting, including the Mellin transform of products and Wronskians of pairs of classical orthogonal polynomials. When the random matrix model has orthogonal or symplectic symmetry, we obtain a new duality formula relating their moments to hypergeometric orthogonal polynomials.
description: 53 pages, 4 figures, 1 table
Finite field models of Raleigh-Akiyama polynomials for Hecke groups
Creators: name: Brent, Barry
Publisher: name: arXiv
Year: 2022
Subjects: subject: Number Theory (math.NT)
subject: Complex Variables (math.CV)
subject: FOS: Mathematics
subject: 11T99

description: Following work of Raleigh and Akiyama
 (\cite{raleigh1962fourier, akiyama1992note}), in \cite{interpolating} we considered (among other objects) families of weight zero meromorphic modular forms $J_m$ for Hecke groups $G(λ_m)$. We conjectured in \cite{interpolating} that, for a certain uniformizing variable $X_m$, the $J_m$ have Fourier expansions $J_m = 1/X_m + \sum_{n = 0}^{\infty} A_n(m) X_m^n$, where the $A_n(x)$ are polynomials in $\mathbb{Q}[x]$. The present article is concerned with models $\mathcal{A}_n[p](x)$ of the $A_n(x)$: polynomials representing self-maps of finite fields with characteristic $p$. The main content is a conjecture specifying $\mathcal{A}_n[p](x)$ up to a multiplicative constant for certain families of $n$ and $p$, based on numerical experiments.
description: Accepted for publication in the journal "Integers"
The conservation of doped-fabric aircraft at the Science Museum, London
Creators: name: Regel, Benjamin Matthew
Publisher: name: Imperial College London
Year: 2018

description: The aim of this research is to improve the approaches used in the conservation of tears in doped-fabric skins of historic aircraft. Conservation at the Science Museum in London has been based upon traditional methods of repair, adhering a fabric patch with several coats of a chemical compound called ‘dope’ over torn areas. This dope is not only an adhesive, but also causes the patch to shrink and thus re-stretch the doped-fabric around the tear, but alternative conservation methods are now desired as it is believed shrinkage of the patches may initiate new failures. Research into the history of doped-fabric as a material and the doped-fabric aircraft at the Science Museum was undertaken so that the collection could be evaluated in relation to the historic record. The application of FTIR-ATR, XRD and XRF to materials retained in the Science Museum archives and of samples taken from the aircraft on display demonstrated that the aircraft were re-skinned with traditional materials expected of a historic doped-fabric aircraft rather than newer synthetic ones. The contraction caused by applying a dope to a fabric panel, and that of a doped-fabric patch to a torn area, was measured using Resistance Strain Gauges, and it was found that the contraction of the patch influenced the strain of material around it, and that the behaviour was anisotropic between the two main fabric directions, warp and weft. Tensile loading experiments also demonstrated that historic material failed at significantly lower loads than the modern materials used for patching. Based on these findings it is recommended that alternatives to doped-fabric patching, as has been practiced at the Science Museum, should be considered due to the potential impact of the patches on surrounding historic material.