cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Homology of twisted quiver bundles with relations
Creators: name: Bartocci, Claudio
name: Bruzzo, Ugo
name: Rava, Claudio L. S.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Representation Theory (math.RT)
subject: Algebraic Geometry (math.AG)
subject: K-Theory and Homology (math.KT)
subject: FOS: Mathematics
subject: 14D20, 16G20, 18G15, 55T99

description: We study the Ext modules in the category of left modules over a twisted algebra of a finite quiver over a ringed space $(X,\mathcal O_X)$, allowing for the presence of relations. We introduce a spectral sequence which relates the Ext modules in that category with the Ext modules in the category of $\mathcal O_X$-modules. Contrary to what happens in the absence of relations, this spectral sequence in general does not degenerate at the second page. We also consider local Ext sheaves. Under suitable hypotheses, the Ext modules are represented as hypercohomology groups
description: 24 pages, 1 figure. v2: 23 pages, 1 figure; last section rewritten with a shorter and more direct proof; references added. v3: Corrections in the metadata. v4: Typos corrected; Lemma 2.3 needed slightly stronger hypotheses. v5: The exposition has been thoroughly streamlined and an example has been added. 22 pages
Space VLBI Observations Show $T_b > 10^{12} K$ in the Quasar NRAO 530
Creators: name: Bower, Geoffrey C.
name: Backer, Donald C.
Publisher: name: arXiv
Year: 1998
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present here space-based VLBI observations with VSOP and a southern hemisphere ground array of the gamma-ray blazar NRAO 530 at 1.6 GHz and 5 GHz. The brightness temperature of the core at 1.6 GHz is $5 \times 10^{11}$ K. The size is near the minimum observable value in the direction of NRAO~530 due to interstellar scattering. The 5 GHz data show a single component with a brightness temperature of $\sim 3 \times 10^{12}$ K, significantly in excess of the inverse Compton limit and of the equipartition brightness temperature limit (Readhead 1994). This is strong evidence for relativistic motion in a jet requiring model-dependent Doppler boosting factors in the range 6 to 60. We show that a simple homogeneous sphere probably does not model the emission region accurately. We favor instead an inhomogeneous jet model with a Doppler boosting factor of 15.
description: 12 pages, 2 figures. Accepted for publication in ApJ Letters
Additional file 1 of Epidemiological and clinical characteristics of immunocompromised patients infected with Pneumocystis jirovecii in a twelve-year retrospective study from Norway
Creators: name: Grønseth, Stine
name: Rogne, Tormod
name: Hannula, Raisa
name: Åsvold, Bjørn Olav
name: Afset, Jan Egil
name: Damås, Jan Kristian
Publisher: name: figshare
Year: 2021
Subjects: Medicine
Cancer
Computational Biology

description: Additional file 1.
On Terminal Hosoya Polynomial of Some Thorn Graphs
Creators: name: Harishchandra S.Ramane
name: Gouramma A. Gudodagi
name: Jummannaver, Raju B.
Publisher: name: figshare
Year: 2018
Subjects: subject: 10104 Combinatorics and Discrete Mathematics (excl. Physical Combinatorics)
subject: FOS: Mathematics

description: In this paper we obtain the terminal Hosoya polynomial for caterpillers, thorn stars and thorn rings. These results generalizes the existing results.
Kinematics of the Broad Emission Line Region in NGC 5548
Creators: name: Done, Christine
name: Krolik, Julian
Publisher: name: arXiv
Year: 1995
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We derive both total flux and velocity-resolved response functions for the CIV 1549 emission line from the data obtained in the 1993 NGC 5548 monitoring campaign. These response functions imply: 1.) the emission region stretches from inside 1 lt-d to outside 10 lt-d, and is probably better described as round than flat; 2.) the velocity field is dominated by a red/blue symmetric component (e.g. 2--d or 3--d random motions, or rotation in a disk) but there is also {\it significant} radial infall. Quantitative modelling indicates that the random speeds are typically a few times as large as the radial speed. However, no simple model gives a completely acceptable fit to the data. These inferences rule out numerous simple and otherwise plausible models for broad line region dynamics, including outflowing winds, radial free-fall, rotation in a disk, or collisionless orbital motion.
description: AASLaTeX file + uuencoded file containing figures
Correlators of Mixed Symmetry Operators in Defect CFTs
Creators: name: Guha, Sunny
name: Nagaraj, Balakrishnan
Publisher: name: arXiv
Year: 2018
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We use the embedding formalism to study correlation functions of a d-dimensional Euclidean CFT in the presence of a $q$ co-dimensional defect. The defect breaks the global conformal group $SO(d+1,1)$ into $SO(d-q+1,1) \times SO(q)$. We calculate all possible invariant structures that can appear in one-point, two-point and three-point correlation functions of bulk and defect operators in mixed symmetry representation. Their generalization to n-point correlation functions are also worked out. Correlation functions in the presence of a defect, in arbitrary representation of $SO(q)$, are also calculated.
description: 39 pages, 3 figures v2: published version. Corrected typos and results from section 4.3 of v1
Acausal quantum theory for non-Archimedean scalar fields
Creators: name: Mendoza-Martínez, M. L.
name: Vallejo, J. A.
name: Zúñiga-Galindo, W. A.
Publisher: name: arXiv
Year: 2018
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: Functional Analysis (math.FA)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 81T05, 11S40, 35S05

description: We construct a family of quantum scalar fields over a $p-$adic spacetime which satisfy $p-$adic analogues of the Gårding--Wightman axioms. Most of the axioms can be formulated the same way in both, the Archimedean and non-Archimedean frameworks; however, the axioms depending on the ordering of the background field must be reformulated, reflecting the acausality of $p-$adic spacetime. The $p-$adic scalar fields satisfy certain $p-$adic Klein-Gordon pseudo-differential equations. The second quantization of the solutions of these Klein-Gordon equations corresponds exactly to the scalar fields introduced here.
description: Third version, with some typos corrected. Accepted for publication in Reviews in Mathematical Physics (2019). Includes referee's suggestions
Smoothed Particle Hydrodynamics in cosmology: a comparative study of implementations
Creators: name: Thacker, R. J.
name: Tittley, E. R.
name: Pearce, F. R.
name: Couchman, H. M. P.
name: Thomas, P. A.
Publisher: name: arXiv
Year: 1998
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We analyse the performance of twelve different implementations of Smoothed Particle Hydrodynamics (SPH) using seven tests designed to isolate key hydrodynamic elements of cosmological simulations which are known to cause the SPH algorithm problems. In order, we consider a shock tube, spherical adiabatic collapse, cooling flow model, drag, a cosmological simulation, rotating cloud-collapse and disc stability. In the implementations special attention is given to the way in which force symmetry is enforced in the equations of motion. We study in detail how the hydrodynamics are affected by different implementations of the artificial viscosity including those with a shear-correction modification. We present an improved first-order smoothing-length update algorithm that is designed to remove instabilities that are present in the Hernquist and Katz (1989) algorithm. For all tests we find that the artificial viscosity is the most important factor distinguishing the results from the various implementations. The second most important factor is the way force symmetry is achieved in the equation of motion. Most results favour a kernel symmetrization approach. The exact method by which SPH pressure forces are included has comparatively little effect on the results. Combining the equation of motion presented in Thomas and Couchman (1992) with a modification of the Monaghan and Gingold (1983) artificial viscosity leads to an SPH scheme that is both fast and reliable.
description: 30 pages, 26 figures and 9 tables included. Submitted to MNRAS. Postscript version available at ftp://phobos.astro.uwo.ca/pub/etittley/papers/sphtest.ps.gz
Gracula barita Linnaeus, 1758, spec. nov.
Creators: name: Linnaeus, Carolus
Publisher: name: Laurentius Salvius
Year: 1758
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Aves
Passeriformes
Sturnidae
Gracula
Gracula barita

description: Gracula barita [spec. nov.]
G. subgrisea, humeris caeruleis, remigibus extus viridibus.
Habitat in Americae Musis, cujus fructus devastat. Rolander.
Rostrum breviusculum, cultratum, nigricans, basi nudum, subtus albicans. Alae complicatis remigibus virides; explicatae remiges intus nigrae. Cauda rotundata, viridis dum complicata.
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 109, DOI: 10.5962/bhl.title.542, http://zenodo.org/record/3922206
The metallicity distribution of G dwarfs in the solar neighbourhood
Creators: name: Rocha-Pinto, Helio J.
name: Maciel, Walter J.
Publisher: name: arXiv
Year: 1995
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We derive a new metallicity distribution of G dwarfs in the solar neighbourhood, using uvby photometry and up-to-date parallaxes. Our distribution comprises 287 G dwarfs within 25 pc from the Sun, and differs considerably from the classic solar neighbourhood distribution of Pagel & Patchett and Pagel by having a prominent single peak around [Fe/H] = -0.20 dex. The raw data are corrected for observational errors and cosmic scatter assuming a deviation of 0.1. In order to obtain the true abundance distribution, we use the correction factors given by Sommer-Larsen, which take into account the stellar scale heights. The distribution confirms the G dwarf problem, that is, the paucity of metal-poor stars relative to the predictions of the simple model of chemical evolution. Another feature of this distribution, which was already apparent in previous ones, is the small number of metal-rich stars again in comparison with the simple model. Our results indicate that it is very difficult to fit the simple model to this distribution, even with the definition of an `effective yield'. A comparison with several models from the literature is made. We find that models with infall are the most appropriate to explain the new metallicity distribution. We also show that the metallicity distribution is compatible with a major era of star formation occurring 5 to 8 Gyr ago, similar to results found by several authors.
description: Tex, uses mn.tex v1.6, 13 pages, 8 figures available upon request, accepted for publication in Monthly Notices of Roy. Astr. Soc
Intrinsic Size OF Sgr A*: 72 Schwarzschild Radii
Creators: name: Lo, K. Y.
name: Shen, Z. -Q.
name: Zhao, J. -H.
name: Ho, P. T. P.
Publisher: name: arXiv
Year: 1998
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Recent proper motion studies of stars at the very center of the Galaxy strongly suggest that Sagittarius (Sgr) A*, the compact nonthermal radio source at the Galactic Center, is a 2.5 million solar mass black hole. By means of near-simultaneous multi-wavelength Very Long Baseline Array measurements, we determine for the first time the intrinsic size and shape of Sgr A* to be 72 Rsc by < 20 Rsc, with the major axis oriented essentially north-south, where Rsc (= 7.5 x 10^{11} cm) is the Schwarzschild radius for a 2.5 million solar mass black hole. Contrary to previous expectation that the intrinsic structure of Sgr A* is observable only at wavelengths shorter than 1 mm, we can discern the intrinsic source size at 7 mm because (1) the scattering size along the minor axis is half that along the major axis, and (2) the near simultaneous multi-wavelength mapping of Sgr A* with the same interferometer makes it possible to extrapolate precisely the minor axis scattering angle at 7 mm. The intrinsic size and shape place direct constraints on the various emission models for Sgr A*. In particular, the advection dominated accretion flow model may have to incorporate a radio jet in order to account for the structure of Sgr A*.
description: 15 pages including 2 ps figures and 1 table, to appear in ApJ Letters
Dissection of the immunomodulatory effects of human immunodeficiency virus and Mycobacterium tuberculosis on cellular immunity
Creators: name: Pollock, Katrina Mary
Publisher: name: Imperial College London
Year: 2012

description: Mycobacterium tuberculosis (MTB) is a significant infectious cause of morbidity and mortality in the HIV-infected population. Despite this, the impact of HIV and active TB on MTB-specific cell mediated immunity (CMI) is incompletely understood. MTB-specific cellular immunity, at defined stages of TB infection (latent and active TB) in those with and without HIV co-infection, was therefore studied and compared with responses to cytomegalovirus (CMV), Epstein-Barr virus (EBV) and Candida albicans. Results from screening 225 participants with a next generation MTB IFN-γ ELISpot were used to stratify participants into predefined subgroups. In those fulfilling study criteria, polychromatic flow cytometry was used to measure CD4+ and CD8+ interferon-gamma (IFN-γ), interleukin-2 (IL-2) and tumour necrosis factor-alpha (TNF-α) responses and markers of cellular memory (CD45RA and CCR7), survival (CD127) and exhaustion (CD279/PD-1). MTB IFN-γ ELISpot responses indicated that current UK guidance for LTBI screening in HIV-infected individuals would fail to detect 50% of cases. The frequency and phenotype of antigen-specific functional subsets varied by pathogen, particularly expression of PD-1, in the flow cytometry assay. The frequency of CD4+ MTB-specific IFN-γ and IL-2-dual-secreting cells was reduced in HIV co-infection, with a similar although less profound effect on viral and fungal-specific responses. In active TB, HIV was associated with increased expression of PD-1 on MTB-specific IFN-γ-secreting functional subsets. In LTBI, HIV was associated with a unique cytokine signature with increased secretion of IL-17 and IL-6. In active TB, there was an increased frequency of MTB-specific CD4+ and CD8+ effectors (secreting IFN-γ, TNF-α or both), CD4+ functional subsets were more differentiated and there was a reduced frequency of viral and fungal-specific tri-functional CD4+ cells. Combined measurement of CD4+ MTB-specific frequency and phenotype yielded a highly discriminatory biomarker of active and latent TB infection with potentially significant clinical impact.
Producing Mega-pixel CMB Maps from Differential Radiometer Data
Creators: name: Wright, Edward L.
name: Hinshaw, Gary
name: Bennett, Charles L.
Publisher: name: arXiv
Year: 1995
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: A major goal of cosmology is to obtain sensitive, high resolution maps of the Cosmic Microwave Background (CMB) anisotropy. Such maps, as would be produced by the recently proposed Microwave Anisotropy Probe (MAP), will contain a wealth of primary information about conditions in the early universe. To mitigate systematic effects when observing the microwave background, it is desirable for the raw data to be collected in differential form: as a set of temperature differences between points in the sky. However, the production of large (mega-pixel) maps from a set of temperature differences is a potentially severe computational challenge. We present a new technique for producing maps from differential radiometer data that has a computational cost that grows in the slowest possible way with increasing angular resolution and number of map pixels. The required central processor (CPU) time is proportional to the number of differential data points and the required random access memory (RAM) is proportional to the number of map pixels. We test our technique, and demonstrate its feasibility, by simulating one year of a space-borne anisotropy mission.
description: 8 pages Latex with 3 Postscript figures embedded using epsf
ConFusion: Sensor Fusion for Complex Robotic Systems using Nonlinear Optimization
Creators: name: Sandy, Timothy
name: Stadelmann, Lukas
name: Kerscher, Simon
name: Buchli, Jonas
Publisher: name: arXiv
Year: 2018
Subjects: subject: Robotics (cs.RO)
subject: Systems and Control (eess.SY)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: We present ConFusion, an open-source package for online sensor fusion for robotic applications. ConFusion is a modular framework for fusing measurements from many heterogeneous sensors within a moving horizon estimator. ConFusion offers greater flexibility in sensor fusion problem design than filtering-based systems and the ability to scale the online estimate quality with the available computing power. We demonstrate its performance in comparison to an iterated extended Kalman filter in visual-inertial tracking, and show its versatility through whole-body sensor fusion on a mobile manipulator.
title: ADCO, Cartulaire général de Cîteaux, dit de Jean de Cirey, (XVe siècle), tome I, Cart. 185 (11 H 70), f. 0137v
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
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2020
Subjects: subject: LaMOP
subject: Laboratoire de Médiévistique Occidentale de Paris
subject: cartulaire
subject: Corpus Burgundiae Medii Aevi
subject: Chartes de la Bourgogne du Moyen Âge

description: Cartulaire général de Cîteaux, dit de Jean de Cirey, (XVe siècle), tome I, Archives départementales de la Côte-d'Or, Cart. 185 (11 H 70), f. 0137v, Numérisation en mode image.
description: Relation: http://www.cbma-project.eu/
description: Bibliographic citation: Cartulaire général de Cîteaux, dit de Jean de Cirey, (XVe siècle), tome I, Archives départementales de la Côte-d'Or, Cart. 185 (11 H 70), f. 0137v, 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
Models for Dusty Lyman alpha Emitters at High Redshift
Creators: name: Haiman, Zoltan
name: Spaans, Marco
Publisher: name: arXiv
Year: 1998
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Models are presented for the Lyman alpha emission of dusty high-redshift galaxies by combining the Press-Schechter formalism with a treatment of the inhomogeneous dust distribution inside galaxies. It is found that the amount of Lyman alpha radiation escaping from the galaxies strongly depends on the time over which the dust is produced through stellar activity, and on the ambient inhomogeneity of the HII regions that surround the ionizing OB stars. Good agreement is found with recent observations, as well as previous non-detections. Our models indicate that the dust content builds up in no more than approximately 5x10^8 yr, the galactic HII regions are inhomogeneous with a cloud covering factor of order unity, and the overall star formation efficiency is at least about 5%. It is predicted that future observations can detect these Lyman alpha galaxies upto redshifts of about 8.
description: 16 pages, 4 figures, submitted to ApJ
Development of a multi-physics molecular dynamics finite element method for the virtual engineering design of nano-structures
Creators: name: Wilmes, Andre Antoine Renaud
Publisher: name: Imperial College London
Year: 2015

description: The rise of technologically promising two-dimensional materials, particularly graphene, has further accelerated the already fast-paced progress in nano-synthesis techniques across all scales. While single atom devices are controllably manufactured, scalable techniques, such as chemical vapour deposition, have brought materials with tuneable nano-structures to the structural engineering scales. Hence, unprecedented design spaces for tailoring material properties at multiple, and previously unattainable, length scales have arisen and continue to expand. Therefore, materials modelling communities must follow the integration of the physics, chemistry and synthesis fields, while accelerating their efforts towards an integrated virtual engineering design and simulation environment. The latter is of pivotal technological significance because future developments of novel materials and devices inherently require virtual designing and optimisation to remain economically feasible. This work proposes and pursues a materials modelling landscape where state of the art methodologies are readily integrated across the scales. A mathematically rigorous molecular dynamics finite element, with novel theoretical attributes, is developed for readily implementing any MD force field, including reactive and fluctuating charge-dipole potentials, within an FEM-legacy numerical platform of solvers. Novel boundary conditions are presented for accurately capturing bending deformations in structures, discrete or continuum, which modularly achieve property homogenisation across differing scales and physical representations; thereby constituting an ideal bridging formulation for multi-scale and multi-physics integration. Numerical implementations of the proposed formulations are achieved within minutes using a network-theory-inspired code generator which presents novel strategies for meshing a priori unknown element topologies with motif-detection algorithms. This work demonstrates the feasibility of an integrated modelling methodologies landscape and achieves a virtual engineering design and simulation environment, which is shown to be versatile and applicable from the smallest scales, for resolving the electromechanical behaviours in potential nano-device designs, to the larger scales where material nano-structures are virtually tested to deduce properties of engineering interest, such as graphenes fracture toughness.
Neuroanatomical correlates of cognitive dysfunction in obstructive sleep apnoea
Creators: name: Glasser, Martin
Publisher: name: Imperial College London
Year: 2016

description: Obstructive sleep apnoea (OSA) has been reported to be associated with brain hypotrophy and cognitive dysfunction; however, whether these normalise after treatment is unclear. The overall aim of this thesis is to investigate the relationship between OSA and brain structure using FreeSurfer (a new automated technique that reliably measures brain structures). I have investigated changes in brain morphology and the newly described phenomenon in OSA of ischaemic preconditioning. Chapters 4 and 5 will also assess brain structural response to CPAP, and investigate the association between brain structure and cognitive function in OSA. Chapter 3 reports an observational study investigating brain structure. FreeSurfer analysis of magnetic resonance imaging (MRI) found OSA patients had hypertrophy in the right hippocampus (p=0.03) and right choroid plexus (p=0.02) but hypotrophy of the corpus callosum (p=0.04) compared to healthy controls. Chapter 4 reports a randomised controlled trial of CPAP in OSA. At baseline hypotrophy was seen in the corpus callosum (p=0.03) and pallidum (p=0.03) of OSA patients compared to healthy controls. Hypertrophic changes in the right thalamus were seen in the CPAP group after 1 month (p=0.06), associated with improvement in verbal memory (p=0.04). Chapter 5 reports a randomised controlled trial of CPAP in older patients with OSA. A significant decrease in left fimbria volume was seen in the CPAP group (p=0.01). A significant increase in the left presubiculum volume was seen in the best supportive care group (p=0.03). No hippocampal hypertrophy was seen in the CPAP group. In summary, young and middle-aged OSA patients had evidence of brain hypotrophy, but also areas of hypertrophy that may signify dendritic sprouting and increased connectivity as a result of ischaemic preconditioning. This allows recovery of brain hypotrophy after CPAP treatment. This was not seen in older OSA patients suggesting an age-related difference which may have implications for OSA treatment in older people.
Numerically Computing QCD Laplace Sum-Rules Using pySecDec
Creators: name: Esau, S.
name: Harnett, D.
Publisher: name: arXiv
Year: 2018
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: pySecDec is a program that numerically calculates dimensionally regularized integrals. We use pySecDec to compute QCD Laplace sum-rules for pseudoscalar (i.e., $J^{PC}=0^{-+}$) charmonium hybrids, and compare the results to sum-rules computed using analytic results for dimensionally regularized integrals. We find that the errors due to the use of numerical integration methods is negligible compared to the uncertainties in the sum-rules stemming from the uncertainties in the parameters of QCD, e.g., the coupling constant, quark masses, and condensate values. Also, we demonstrate that numerical integration methods can be used to calculate finite-energy and Gaussian sum-rules in addition to Laplace sum-rules.
description: 10 pages, 5 figures
X-ray Timing and Spectral Behavior of the Rapid Burster
Creators: name: Rutledge, Robert
name: Lubin, Lori
name: Lewin, Walter
name: Vaughan, Brian
name: van Paradijs, Jan
name: van der Klis, Michiel
Publisher: name: arXiv
Year: 1995
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present an X-ray fast-timing and spectral analysis of the type II bursts and the persistent emission (PE) of the Rapid Burster observed with the EXOSAT Medium-Energy Instrument. The Hardness-Intensity and Color-Color Diagrams of the Rapid Burster are somewhat different from those of the majority of other low-mass X-ray binaries, which fall into two distinct groups, ``atoll'' and ``Z'' sources. The strength and frequencies of quasi-periodic oscillations (QPO) in the bursts and the PE, as well as a strong anti-correlation between QPO frequency and burst peak flux, also distinguish the Rapid Burster from atoll and Z sources. The presence, frequency, and strength of QPO in type II bursts are all correlated in some manner to the spectral hardness, as are the strength of QPO and the very low-frequency noise (VLFN) component in the persistent emission.
description: 52 pages, including 20 figures, LaTeX; complete Postscript file available from http://space.mit.edu/home/rutledge/Welcome.html ; MNRAS in press
Gracula cristatella Linnaeus, 1758, spec. nov.
Creators: name: Linnaeus, Carolus
Publisher: name: Laurentius Salvius
Year: 1758
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Aves
Passeriformes
Sturnidae
Gracula
Gracula cristatella

description: Gracula cristatella [spec. nov.]
G. nigra, remigibus primoribus basi rectricibusque apice albis, rostro flavo.
Sturnus chinensis niger. Edw. av. 19. t. 19.
Habitat in China.
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 109, DOI: 10.5962/bhl.title.542, http://zenodo.org/record/3922206
Additional file 2 of Mechanical transmission of SARS-CoV-2 by house flies
Creators: name: Balaraman, Velmurugan
name: Drolet, Barbara S.
name: Mitzel, Dana N.
name: Wilson, William C.
name: Owens, Jeana
name: Gaudreault, Natasha N.
name: Meekins, David A.
name: Bold, Dashzeveg
name: Trujillo, Jessie D.
name: Noronha, Leela E.
name: Richt, Juergen A.
name: Nayduch, Dana
Publisher: name: figshare
Year: 2021
Subjects: subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Biotechnology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Ecology
subject: Immunology
subject: FOS: Clinical medicine
subject: 69999 Biological Sciences not elsewhere classified
subject: 110309 Infectious Diseases
subject: FOS: Health sciences
subject: 60506 Virology
subject: Computational Biology

description: Additional file 2: Table S1. SARS-CoV-2 titers in various test substrates.
On the Tangent Vector Fields of Striction Curves Along the Involute and Bertrandian Frenet Ruled Surfaces
Creators: name: Seyda Kılıcoglu
Publisher: name: figshare
Year: 2018
Subjects: subject: 10104 Combinatorics and Discrete Mathematics (excl. Physical Combinatorics)
subject: FOS: Mathematics

description: Results are given on the striction curves of involute and Bertrand Frenet ruled surfaces based on the tangent vector fields.
Applied 3D full-waveform inversion: increasing the resolution and depth penetration
Creators: name: Silverton, Akela Tian Theresa
Publisher: name: Imperial College London
Year: 2015

description: High-resolution velocity models, at near surface and deeper reservoir depths are produced with three-dimensional, acoustic, anisotropic, full-waveform inversion. Industry experts show eager interest in the development of this technology with a drive to push its application to reflection-dominated streamer datasets as well as ocean-bottom-node datasets in geologically complex environments. Here, a robust methodology employing the use of key strategies to address the inversion of such datasets, attaining increased resolution and depth penetration, is explored. Synthetic tests were undertaken to exploit the use of reflected energy. Key strategies: muting of direct arrivals, time windowing, and layer-stripping, all produced highly resolved, full waveform inversion models. These strategies have been incorporated into inversion schemes focusing solely on reflection targets. Strategies to further improve model resolution for field datasets were then investigated. Close examination of a full-waveform inversion model for a shallow-water ocean-bottom-node dataset, revealed a systematic mismatch between the observed and predicted data. After conducting a series of tests, it was illustrated that systematic errors in the starting model, source wavelet, incomplete convergence, or an inadequate finite-difference mesh did not cause the mismatch. Instead, inadequacies in the physics used during inversion are believed to be the cause. The introduction of an offsetvariable density scheme during inversion, compensated efficiently and heuristically for these inaccuracies, removing the mismatch and increasing the model resolution. The sensitivity of full-waveform inversion to local minima, where the computed model is stuck away from the real global-minimum solution and further iterations of the optimisation bring no reward, was kept in mind during the inversion of two deep-water ocean-bottom node datasets. Thus, full-waveform inversion was undertaken using conditioned data obtained through adaptive matching, incorporating higher frequencies and a greater weight on reflected energy, valuably pushing the limits of resolution and depth penetration of the update. The use of all these robust methodologies improved the travel-time match; better flattened common-image gathers giving a closer fit to well logs and an improvement in the pre-stack depth-migrated image. Effectively, the reflectivity was non-linearly migrated into the velocity model via the inversion acting on raw unprocessed waveforms. Thus, full waveform inversion can eventually replace conventional processing and migration – all that is needed, is a full-bandwidth velocity model.
Integral Regulators for Higher Chow Complexes
Creators: name: Li, Muxi
Publisher: name: arXiv
Year: 2018
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics

description: Building on Kerr, Lewis and Mueller-Stach's work on the rational regulator, we prove the existence of an integral regulator on higher Chow complexes and give an explicit expression. This puts firm ground under some earlier results and speculations on the torsion in higher cycle groups by K-L-M, Petras, and Kerr-Yang.
Regularization of Inverse Problems via Time Discrete Geodesics in Image Spaces
Creators: name: Neumayer, Sebastian
name: Persch, Johannes
name: Steidl, Gabriele
Publisher: name: arXiv
Year: 2018
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics

description: This paper addresses the solution of inverse problems in imaging given an additional reference image. We combine a modification of the discrete geodesic path model for image metamorphosis with a variational model,actually the $L^2$-$TV$ model, for image reconstruction. We prove that the space continuous model has a minimizer which depends in a stable way from the input data. Two minimization procedures which alternate over the involved sequences of deformations and images in different ways are proposed. The updates with respect to the image sequence exploit recent algorithms from convex analysis to minimize the $L^2$-$TV$ functional. For the numerical computation we apply a finite difference approach on staggered grids together with a multilevel strategy. We present proof-of-the-concept numerical results for sparse and limited angle computerized tomography as well as for superresolution demonstrating the power of the method.
Design of remote control software of near infrared Sky Brightness Monitor in Antarctica
Creators: name: Wang, Zhi-yue
name: Chen, Ya-qi
name: Jia, Ming-hao
name: Zhang, Guang-yu
name: Zhang, Jun
name: Zhang, Yi-hao
name: Chen, Jin-ting
name: Zhang, Hong-fei
name: Jiang, Peng
name: Ji, Tuo
name: Wang, Jian
Publisher: name: arXiv
Year: 2018
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Signal Processing (eess.SP)
subject: FOS: Physical sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: The Near-infrared Sky Brightness Monitor (NIRBM) aims to measure the middle infrared sky background in Antarctica. The NIRBM mainly consists of an InGaAs detector, a chopper, a reflector, a cooler and a black body. The reflector can rotate to scan the sky with a field of view ranging from 0° to 180°. Electromechanical control and weak signal readout functions are accomplished by the same circuit, whose core chip is a STM32F407VG microcontroller. Considering the environment is harsh for humans in Antarctica, a multi-level remote control software system is designed and implemented. A set of EPICS IOCs are developed to control each hardware module independently via serial port communication with the STM32 microcontroller. The tornado web framework and PyEpics are introduced as a combination where PyEpics is used to monitor or change the EPICS Process Variables, functioning as a client for the EPICS framework. Tornado is responsible for the specific operation process of inter-device collaboration, and expose a set of interfaces to users to make calls. Considering the high delay and low bandwidth of the network environment, the tornado back-end is designed as a master-and-agent architecture to improve domestic user experience. The master node is deployed in Antarctic while multiple agent nodes can be deployed domestic. The master and agent nodes communicate with each other through the WebSocket protocol to exchange latest information so that bandwidth is saved. The GUI is implemented in the form of single-page application based on the Vue framework which communicates with tornado through WebSocket and AJAX requests. The web page integrates device control, data curve drawing, alarm display, auto observation and other functions together.
description: Many revision were done after the submission, and the result in this paper may need more correction
Regular Intuitionistic Fuzzy Graphs
Creators: name: N.R. Santhi Maheswari
name: C. Sekar
Publisher: name: figshare
Year: 2018
Subjects: subject: 10104 Combinatorics and Discrete Mathematics (excl. Physical Combinatorics)
subject: FOS: Mathematics

description: In this paper, ((r1, r2),m, (c1, c2))-regular intuitionistic fuzzy graph and totally ((r1, r2),m, (c1, c2))-regular intuitionistic fuzzy graphs are introduced. A relation between ((r1, r2),m, (c1, c2))-regularity and totally ((r1, r2),m, (c1, c2))-regularity on Intuitionistic fuzzy graph is studied. A necessary and sufficient condition under which they are equivalent is provided. Also, ((r1, r2),m, (c1, c2))-regularity on some intuitionistic fuzzy graphs whose underlying crisp graphs is a cycle is studied with some specific membership functions.
Gracula saularis Linnaeus, 1758, spec. nov.
Creators: name: Linnaeus, Carolus
Publisher: name: Laurentius Salvius
Year: 1758
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Aves
Passeriformes
Sturnidae
Gracula
Gracula saularis

description: Gracula saularis [spec. nov.]
G. nigro-caerulescens, abdomine macula alarum rectricibusque lateralibus albis.
Pica minor benghalensis. Edw. av. 181. t. 181.
Dialbird. Alb. av. 3. p. 17. t. 17. 18.
Saularis maderaspatanus. Raj. av. 197. t. 2. f. 19. 20.
Habitat in Asia.
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 109, DOI: 10.5962/bhl.title.542, http://zenodo.org/record/3922206
Calcium incorporation into silica/gelatin hybrids for tissue engineering
Creators: name: Van Den Bergh, Wouter
Publisher: name: Imperial College London
Year: 2017

description: With an aging population and an increase in the proportions of that population with access to high quality health care the need for a synthetic bone regenerative scaffold continues to increase. Mahony et al. produced an encouraging type II silica-gelatin hybrid with tailorable properties but without calcium content. This work focuses on investigating methods for including calcium into that material. Calcium chloride and various monobasic calcium phosphate compositions were investigated via SBF analysis followed by SEM, EDX, FTIR, XRD and BCA assay analysis. It was found that while an increasing fraction of monobasic calcium phosphate increased the rate of calcium phosphate deposition in SBF trials the synthesis route (especially drying) proves unreliable. Although some suggestion that incorporation of calcium into the silica network occurred was found, no clear evidence thereof could be determined. The use of a synthetic polymer to increase the amount of calcium chelating COOH groups in the material was investigated via addition polymerisation of methacrylic acid. Monoliths were produced and they were found to significantly increase the rate of calcium phosphate deposition onto the material surface. The possibility of crosslinking pMAA using GPTMS via the same route as used for gelatin was explored but found not to lead to crosslinking at COOH sites on the polymer. The work done suggests that a number of routes exist for improving the bioactivity and osteogenic character of type II silica gelatin scaffolds, considerable work remains to fully characterise these approaches.
Quantitative analysis of cellular perception in eukaryotic signalling networks
Creators: name: Granados Castro, Alejandro Adrian
Publisher: name: Imperial College London
Year: 2016

description: Organisms must detect changes in the environment, integrate information from multiple sources, and make informed decisions about how to use resources to respond and adapt. At the cellular level, information is sensed and processed by signalling networks that coordinate sensory information with physiological responses such as regulation of gene expression. Complex phenotypes such as cellular differentiation and disease states derive from decision making processes and depend on whether information is processed correctly. In order to address this complexity, it is necessary to consolidate the molecular mechanisms that process information into an integrative framework. While substantial research has been conducted on each of cellular signalling and gene regulation, a quantitative framework to understand the information flow is still missing. Perception, as defined for humans, comprises fundamental concepts of information processing: identification, organization, representation and interpretation. Here we argue that we can represent the flow of information in cellular systems by developing a framework of cellular perception. In general terms, information has to be sensed and internalized by signalling networks before it can be encoded into internal variables that cells can use to represent the environment. We thus investigate the molecular mechanisms by which cells sense and encode information in the single-cell microbe Saccharomyces cerevisiae as an example organism. In S. cerevisiae, as in all eukaryotes, a main mechanism to regulate gene expression is the dynamic nuclear translocation of transcription factors. We develop a framework of cellular perception in the context of dynamic nuclear translocation by characterizing the sensing and encoding of information necessary to accurately map environmental conditions to specific cellular responses. By investigating the sensing mechanisms of the hyperosmolar glycerol (HOG) MAPK network, we showed how this network improves sensing of dynamic signals by having two specialized input pathways. For the encoding mechanisms, we showed that the dynamic roles of nuclear translocation of transcription factors can function as highly informative intracellular variables. As these internal variables can encode both the magnitude and identity of the stress signal, they can be used by the cell to accurately represent the environment and determine the specific physiological responses. This thesis provided a solid ground for quantitative research in the field of cellular signalling and gene regulation. Moreover, the methods and experimental approaches applied here are broadly applicable in other organisms.
Additional file 3 of Mechanical transmission of SARS-CoV-2 by house flies
Creators: name: Balaraman, Velmurugan
name: Drolet, Barbara S.
name: Mitzel, Dana N.
name: Wilson, William C.
name: Owens, Jeana
name: Gaudreault, Natasha N.
name: Meekins, David A.
name: Bold, Dashzeveg
name: Trujillo, Jessie D.
name: Noronha, Leela E.
name: Richt, Juergen A.
name: Nayduch, Dana
Publisher: name: figshare
Year: 2021
Subjects: subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Biotechnology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Ecology
subject: Immunology
subject: FOS: Clinical medicine
subject: 69999 Biological Sciences not elsewhere classified
subject: 110309 Infectious Diseases
subject: FOS: Health sciences
subject: 60506 Virology
subject: Computational Biology

description: Additional file 3: Table S2. Acquisition study: Detection of SARS-CoV-2 RNA and infectious virus on inner container surfaces.
About Some Relatives of the Taxicab Number
Creators: name: Nitica, Viorel
Publisher: name: arXiv
Year: 2018
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11B83

description: The taxicab number, $1729$, has the following property. If we add its digits we obtain $19$. The number obtained from $19$ by reversing the order of its digits is $91$. If we multiply $19$ by $91$ we obtain again $1729$. In the paper we study various generalizations of this property.
description: This version has some minor corrections
Wettability characterization using streaming potential measurements
Creators: name: Alroudhan, Abdulkareem
Publisher: name: Imperial College London
Year: 2015

description: The surface charge of carbonate minerals, which is also expressed in terms of the zeta potential, plays a key control on reservoir wettability, and changes in the zeta potential have been invoked to explain wettability alteration and the release of previously trapped oil during controlled salinity waterflooding (CSW). We report a method to characterize the zeta potential of carbonates, based on measurements of streaming potential, which can be used to determine the zeta potential of mineral-brine and oil-brine interfaces within the porous medium. The aim of this project was to determine the effect of total salinity, potential determining ion (PDI) contribution, and wetting state on the zeta potential of limestone. In the first part, we use the streaming potential method to obtain measurements of zeta potential on intact core samples at typical reservoir brine salinity and composition. We determine the impact on zeta potential of varying the total salinity, and the concentration of the PDIs calcium, magnesium and sulfate. The impact of each PDI was determined over a wide range of concentrations naturally found in sea water, formation brines, and typical compositions used in CSW. We find that the zeta potential varies identically and linearly with calcium and magnesium concentration expressed as pCa or pMg. The zeta potential also varies linearly with pSO4. The sensitivity of the zeta potential to PDI concentration, and the IEP (iso-electric point) expressed as pCa or pMg, both decrease with increasing NaCl concentration. We report considerably lower values of IEP than most previous studies, and the first observed IEP expressed as pMg. The sensitivity of the zeta potential to PDI concentration is lower when measured using the SPM compared to the EPM, owing to the differing location of the shear plane at which the zeta potential is defined. In the second part, we use the streaming potential method to investigate how the zeta potential changes when an oil phase is introduced in the rock sample. We establish a relationship between wettability and the zeta potential. This is done for samples that were aged in the presence and absence of a brine phase, in order to represent mixed-wet and oil-wet cases. In addition, measurements on non-aged samples were conducted in order to represent the water-wet case. We find that the more oil-wet the system is, the more negative the zeta potential gets with the oil-wet case being the most negatively charged. For the crude oil samples, we find that there is a strong correlation between the Amott Index and the zeta potential. Our findings suggest that the streaming potential method can be used to assess the impact of water chemistry and wetting state on the surface charge of limestone. The results are directly applicable to wettability characterization and understanding of wettability alteration that may take place during CSW.
Variable degeneracy of planar graphs without chorded 6-cycles
Creators: name: Fang, Huihui
name: Huang, Danjun
name: Wang, Tao
name: Wang, Weifan
Publisher: name: arXiv
Year: 2025
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 05C15

description: A cover of a graph $G$ is a graph $H$ with vertex set $V(H) = \bigcup_{v \in V(G)} L_{v}$, where $L_{v} = \{v\} \times [s]$, and the edge set $M = \bigcup_{uv \in E(G)} M_{uv}$, where $M_{uv}$ is a matching between $L_{u}$ and $L_{v}$. A vertex set $T \subseteq V(H)$ is a transversal of $H$ if $|T \cap L_{v}| = 1$ for each $v \in V(G)$. Let $f$ be a nonnegative integer valued function on the vertex-set of $H$. If for any nonempty subgraph $Γ$ of $H[T]$, there exists a vertex $x \in V(H)$ such that $d(x) < f(x)$, then $T$ is called a strictly $f$-degenerate transversal. In this paper, we give a sufficient condition for the existence of strictly $f$-degenerate transversal for planar graphs without chorded $6$-cycles. As a consequence, every planar graph without subgraphs isomorphic to the configurations in Fig. 4 is DP-$4$-colorable.
description: 16 pages, 13 figures