cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Loxia hordeacea Linnaeus, 1758, spec. nov.
Creators: name: Linnaeus, Carolus
Publisher: name: Laurentius Salvius
Year: 1758
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Aves
Passeriformes
Fringillidae
Loxia
Loxia hordeacea

description: Loxia hordeacea [spec. nov.]
L. fulva, temporibus albis, cauda pectoreque atris. Mus. Ad. Fr. 2. p ...
Habitat in Indiis.
Corpus magnitudine Motacillae albae. Grisea sunt Humeri, Femora, Ani regio, margines Rectricum. Nigra sunt Tempora ad rostrum usque, Alae & Remiges, Cauda & Rectrices, Pectus. Fulva sunt Caput, Collum, Uropygium.
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 173, DOI: 10.5962/bhl.title.542, http://zenodo.org/record/3922206
Deep counts of submillimeter galaxies
Creators: name: Blain, Andrew W.
name: Kneib, Jean-Paul
name: Ivison, R. J.
name: Smail, Ian
Publisher: name: arXiv
Year: 1998
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present the counts of luminous submillimeter (sub-mm) galaxies from an analysis of our survey of the distant Universe through lensing clusters, which uses massive cluster lenses with well-constrained mass models to magnify the background sky. This both increases the sensitivity and reduces the effects of source confusion. Accurate lens models are used to correct the observed sub-mm source counts. The associated uncertainties do not dominate the final errors. We derive counts by two independent methods: a direct inversion of the observed sources, corrected individually for lens amplification; and a Monte-Carlo simulation of our observations using a parametric model for the background counts, which is folded through the lens models and incompleteness estimates to determine best-fitting values of the count parameters. Both methods agree well and confirm the robustness of our analysis. Detections that are optically identified with galaxies in the lensing clusters are removed prior to our analysis, and the results are insensitive both to the details of the correction and to the redshift distribution of the detections. We present 850-micron counts between 0.5 and 8 mJy. The most accurate count is determined at 1 mJy: 7900 +- 3000 deg^-2, including both Poisson and systematic errors. These are the deepest sub-mm counts published, and are not subject to source confusion because the detected galaxies are separated and magnified by the lens. Down to the 0.5-mJy limit, the resolved 850-micron background radiation intensity is (0.5 +- 0.2) nW m^{-2} sr^{-1}, comparable to the current COBE estimate of the background, and so the bulk of the 850-micron background radiation originated in distant ultraluminous galaxies.
description: 5 pages, 3 figures, uses psfig.sty and emulateapj.sty. In press at ApJ Letters. Replaced with proof corrected version
Numerical methods for multi-scale interfacial flows
Creators: name: Evrard, Fabien
Publisher: name: Imperial College London
Year: 2017

description: Fluid-fluid interfaces are omnipresent in nature as well as in industrial processes. Yet, the understanding and modelling of their behaviour is limited. The main challenges associated with the numerical modelling of interfacial flows lie in the accurate transport of the fluid-fluid interface and in the stable discrete treatment of surface tension. Numerous numerical methods have been developed to address these issues, however most available methods are specific to Cartesian meshes. Additionally, the multi-scale behaviour of interfacial flows of practical importance is a limiting factor in their modelling, since requiring prohibitively large simulation meshes. In order to improve the accuracy and stability of interfacial flow simulations on unstructured meshes, two novel methods for the estimation of curvature are presented. The first method relies on the reconstruction of a triangulated interface, from which curvature is estimated using an adaptive fitting approach in conjunction with a partition of unity approximation technique. The second method requires to solve for local volume-fraction-based parabolic reconstruction problems, and extends the height-function curvature evaluation method to unstructured meshes. This method is shown to produce convergent curvature estimations on unstructured meshes, and exhibits a stable behaviour with regard to parasitic currents. To reduce the costs associated with the modelling of multi-scale interfacial flows, such as atomising sprays, a hybrid Eulerian-Lagrangian method is presented. An interface-capturing scheme is employed to accurately resolve the interface in the primary atomisation region, whereas small liquid elements are tracked using Lagrangian particle tracking. The method relies on a filtering approach, which is shown to allow a consistent modelling of Lagrangian droplets with arbitrary particle diameter to cell size ratios. The hybrid method is applied to a realistic spray atomisation case, and its impacts on the interface dynamics and spray statistics is studied.
The term structure of risk premia with heterogeneous preferences and beliefs
Creators: name: Golosov, Edward
Publisher: name: Imperial College London
Year: 2017

description: The purpose of this study is to oﬀer a general equilibrium model of economy capable of explaining the changes in the term structure of equity risk premia as a result of the global ﬁnancial crisis (GFC) of 2008-09, when the global economy experienced an unprecedented shock to the aggregate consumption. The data on the realised risk premia on dividend futures presented in Binsbergen and Koijen (2016) suggested the possibility of a change in slope of the term structure around the time of the GFC in three(Europe,theUK, and Japan)out of four economies considered: the term structure went from upward to downward-sloping. My own analysis of prices of dividend swaps on S&P500, Euro Stoxx 50, Nikkei 225, and FTSE 100 from 2005 to 2016 presented in Chapter 2 shows that the term structure went from upward to downward-sloping in Europe and the UK and from upward-sloping to ﬂat in the US and Japan. In Chapter 1, I consider a continuous-time "Lucas-tree" economy with a long-run risk in the form a two-state Markov chain regime switching with the representative agent endowed with Epstein-Zin-Weil preferences. I ﬁnd that the sign of the slope of the term structure is determined by the parameters of preferences and does not change its sign in response to consumption shocks. Chapter 2 is dedicated to an economy with constant growth and volatility of consumption populated by two agents having CRRA preferences with heterogeneity in both their preferences and beliefs. I ﬁnd that in this setting, the sign of the slope may changes in response to signiﬁcant consumption shocks and derive the conditions, under which it happens. I also analyse the eﬀect of various heterogeneities, and calibrate the model. In Chapter 3 I solve the same economy but with two Epstein-Zin-Weil agents with diﬀerences both in preferences and beliefs and demonstrate the eﬀects, as well as beneﬁts to calibration, of adding heterogeneity in the elasticity of intertemporal substitution. As an extension, I also consider the eﬀect of adding a long-run risk in the form of a 2 two-state Markov chain regime switching considered in Chapter 1.
A study of the relativistic corrections to polarized tritium $β$-decay
Creators: name: Cavoto, Gianluca
name: Esposito, Angelo
name: Papiri, Guglielmo
name: Polosa, Antonio Davide
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Forthcoming experiments like Project8 and Ptolemy aim at investigating with high precision the end-point of the tritium $β$-decay spectrum sensitive to the neutrino mass. In light of this, using the standard parametrization in terms of nuclear polar form factors, we analyze the complete relativistic expression for the spectrum of the $β$-electron emitted by a tritium nucleus. Given the small parameters in the problem, we systematically discuss the approximations that can be made, and present the first two corrections to the standard lowest order formula. We particularly discuss the case of an initially polarized target, and the consequences on the spectrum as a function of the neutrino mass. We show that, while it induces an angular anisotropy that can be measured by future experiments, such anisotropy cannot be used as an additional handle to constrain the neutrino mass.
description: 6 pages, 4 figure, 1 table
Loxia chloris Linnaeus, 1758, spec. nov.
Creators: name: Linnaeus, Carolus
Publisher: name: Laurentius Salvius
Year: 1758
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Aves
Passeriformes
Fringillidae
Loxia
Loxia chloris

description: Loxia chloris [spec. nov.]
L. flavicanti-virens, remigibus primoribus antice luteis, rectricibus lateralibus quatuor basi luteis.
Fringilla eadem. Fn. svec. 202.
Chloris. Gesn. av. 259. Will. orn. 129. Raj. av. 85. n. 4. Alb. av. 1. p. 56. t. 58. Frisch. av. l. 8. f. 3. 4. Aldr. orn. l. 18. c. 18.
Habitat in Europa.
Media quasi inter Loxias & Emberizas, sed rostrum crassius quam in Emberizis.
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 174, DOI: 10.5962/bhl.title.542, http://zenodo.org/record/3922206
Approaches for studying allostery using network theory
Creators: name: Hodges, Maxwell
Publisher: name: Imperial College London
Year: 2018

description: Allostery is the process whereby binding of a substrate at a site other than the active site modulates the function of a protein. Allostery is thus one of the myriad of biological processes that keeps cells under tight regulatory control, specifically one that acts at the level of the protein rather than through changes in gene transciption or translation of mRNA. Despite over 50 years of investigation, allostery has remained a difficult phenomenon to elucidate. Structural changes are often too subtle for many experimental methods to capture and it has become increasingly obvious that a range of timescales are involved, from extremely fast pico- to nanosecond local fluctuations all the way up to the millisecond or even second timescales over which the biological effects of allostery are observed. As a result, computational methods have arisen to become a powerful means of studying allostery, aided greatly by the staggering increases in computational power over the last 70 years. A field that has experienced a surge in interest over the last 20 years or so is \emph{network theory}, perhaps stimulated by the development of the internet and the Web, two examples of immensely important networks in our everyday life. One of the reasons for the popularity of networks in modelling is their comparative simplicity: a network consists of \emph{nodes}, representing a set of objects in a system, and \emph{edges}, that capture the relations between them. In this thesis, we both apply existing ideas and methods from network theory and develop new computational network methods to study allostery in proteins. We attempt to tackle this problem in three distinct ways, each representing a protein using a different form of a network. Our initial work follows on logically from previous work in the group, representing proteins as \emph{graphs} where atoms are nodes and bonds are energy weighted edges. In effect we disregard the 3-dimensional structure of the protein and instead focus on how the bond \emph{connectivity} can be used to explain potential long range communication between allosteric and active sites in a multimeric protein. We then focus on a class of protein models known as \emph{elastic network models}, in which our edges now correspond to mechanical Hooke springs between either atoms or residues, in order to attempt to understand the physical, mechanistic basis of allostery.
Additional file 3: of Systematic review of health state utility values in metastatic non-small cell lung cancer with a focus on previously treated patients
Creators: name: Noman Paracha
name: Abdulla, Ahmed
name: MacGilchrist, Katherine
Publisher: name: figshare
Year: 2018
Subjects: subject: Medicine
subject: Cell Biology
subject: Sociology
subject: FOS: Sociology
subject: Cancer
subject: 110309 Infectious Diseases
subject: FOS: Health sciences
subject: Computational Biology

description: Figure S1. Hierarchy of preferred methodology for generation of HSUVs for different HTA agencies. (PDF 1172 kb)
Feasibility study of the positronium imaging with the J-PET tomograph
Creators: name: Moskal, P.
name: Kisielewska, D.
name: Curceanu, C.
name: Czerwiński, E.
name: Dulski, K.
name: Gajos, A.
name: Gorgol, M.
name: Hiesmayr, B.
name: Jasińska, B.
name: Kacprzak, K.
name: Kapłon, Ł.
name: Korcyl, G.
name: Kowalski, P.
name: Krzemień, W.
name: Kozik, T.
name: Kubicz, E.
name: Mohammed, M.
name: Niedźwiecki, Sz.
name: Pałka, M.
name: Pawlik-Niedźwiecka, M.
name: Raczyński, L.
name: Raj, J.
name: Sharma, S.
name: Shivani
name: Shopa, R. Y.
name: Silarski, M.
name: Skurzok, M.
name: Stȩpień, E.
name: Wiślicki, W.
name: Zgardzińska, B.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: Medical Physics (physics.med-ph)
subject: FOS: Physical sciences

description: A detection system of the conventional PET tomograph is set-up to record data from e+ e- annihilation into two photons with energy of 511 keV, and it gives information on the density distribution of a radiopharmaceutical in the body of the object. In this paper we explore the possibility of performing the three gamma photons imaging based on ortho-positronium annihilation, as well as the possibility of positronium mean lifetime imaging with the J-PET tomograph constructed from plastic scintillators. For this purposes simulations of the ortho-positronium formation and its annihilation into three photons were performed taking into account distributions of photons' momenta as predicted by the theory of quantum electrodynamics and the response of the J-PET tomograph. In order to test the proposed ortho-positronium lifetime image reconstruction method, we concentrate on the decay of the ortho-positronium into three photons and applications of radiopharmaceuticals labeled with isotopes emitting a prompt gamma quantum. The proposed method of imaging is based on the determination of hit-times and hit-positions of registered photons which enables the reconstruction of the time and position of the annihilation point as well as the lifetime of the ortho-positronium on an event-by-event basis. We have simulated the production of the positronium in a cylindrical phantom composed of a set of different materials in which the ortho-positronium lifetime varied from 2.0 ns to 3.0 ns, as expected for ortho-positronium created in the human body. The presented reconstruction method for total-body J-PET like detector allows to achieve a mean lifetime resolution of about 40 ps. Recent Positron Annihilation Lifetime Spectroscopy measurements of cancerous and healthy uterine tissues show that this sensitivity may allow to study the morphological changes in cell structures.
description: accepted in PMB (http://iopscience.iop.org/article/10.1088/1361-6560/aafe20)
Nonlinear dynamic analysis of pipe assemblies via experimental characterisation and nonlinear dynamic reduced order modelling
Creators: name: Sanchez Pinilla, Alberto
Publisher: name: Imperial College London
Year: 2018

description: In this thesis a new reduced order modelling methodology is presented with the aim of calculating the nonlinear dynamic response of fuel manifold alike assemblies. This bottom-up approach started with the experimental characterisation of the individual components that typically form part of a fuel manifold, to later characterise the interaction between them in more complex subassemblies. Once the different elements and subassemblies were characterised, two different model designs were proposed: an implicit 6 DOF/node model and a hybrid 3 DOF/node model. The design parameters of both models were obtained by means of model updating and optimisation against experimental data. Finally, an analytical study on the influence of multiple nonlinearities was performed in order to determine the dynamic trend when an increasing number nonlinear joints are added into a certain system
Quadrature Control-Bounded ADCs
Creators: name: Malmberg, Hampus
name: Feyling, Fredrik
name: de la Rosa, Jose M
Publisher: name: arXiv
Year: 2022
Subjects: subject: Systems and Control (eess.SY)
subject: Signal Processing (eess.SP)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: In this paper, the design flexibility of the control-bounded analog-to-digital converter principle is demonstrated by considering band-pass analog-to-digital conversion. We show how a low-pass control-bounded analog-to-digital converter can be translated into a band-pass version where the guaranteed stability, converter bandwidth, and signal-to-noise ratio are preserved while the center frequency for conversion can be positioned freely. The proposed converter is validated with behavioral simulations for a variety of filter orders, notch-filter frequencies, and oversampling ratios. Finally, robustness against component variations is demonstrated by Monte Carlo simulations.
description: 5 pages, 6 figures, submitted to ISCAS 2023
Fracture potential of evaporite seals during CO2 injection operations a numerical modelling & field study approach
Creators: name: Esperancinha, Sérgio Carreiras
Publisher: name: Imperial College London
Year: 2017

description: This project, focuses on the potential for evaporite cap-rocks to undergo fluid induced failure as a result of CO2 injection in underlying carbonate reservoirs. The specific rock properties that control fracture propagation through layered evaporites and the features that might influence fluid flow in these low permeability units were studied using a multidisciplinary approach. Field work was carried out on a local scale studying a gypsum mine, drill cores and several outcrops in order to determine the internal structures within seals that might influence fracture formation. On a regional scale studies were carried out to determine the stress history of the seal in Qatar and the likely fractures it might contain as a result of burial, diagenesis and tectonism. A detailed study of the theory of brittle failure (in particular of fluid induced failure) was also conducted in order to lay down the principles that control stress distribution in the crust. This information allowed to define the boundary conditions for the Finite Discrete Element Method models used to look at fracture propagation in layered materials. It was concluded that evaporite sequences are vertically and horizontally heterogeneous with both primary and secondary layers and interfaces, some of which are linked to internal hydraulic fracturing of the rock. The field studies together with the numerical models show that low friction along an interface contributes to fracture arrest; that the thickness of an incompetent layer is not a decisive factor in determining whether or not a fracture propagates through that weak layer and that a weak layer (low Young’s Modulus) is able to impede a fracture that formed in a strong layer from propagating into it. It is also suggested that trough-going fractures are not always formed by the propagation of a fracture through successive adjacent layers but that they occur by the linking of individual extensional fractures to form a through-going fracture.
Loxia mexicana Linnaeus, 1758, spec. nov.
Creators: name: Linnaeus, Carolus
Publisher: name: Laurentius Salvius
Year: 1758
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Aves
Passeriformes
Fringillidae
Loxia
Loxia mexicana

description: Loxia mexicana [spec. nov.]
L. grisea, fronte gula uropygio superciliisque luteis.
Linaria mexicana, capite flavo. Edw. av. 44. t. 44.
Habitat in America. Mus. DeGeer.
Magnitudo Fringillae. Fasciae duae cinerascentesque in tectricibus alarum. Cauda 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 174, DOI: 10.5962/bhl.title.542, http://zenodo.org/record/3922206
The differential magnification of high-redshift ultraluminous infrared galaxies
Creators: name: Blain, Andrew W.
Publisher: name: arXiv
Year: 1998
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: A class of extremely luminous high-redshift galaxies has recently been detected in unbiased submillimetre-wave surveys using the Submillimetre Common-User Bolometer Array (SCUBA) camera at the James Clerk Maxwell Telescope. Most of the luminosity of these galaxies is emitted from warm interstellar dust grains, and they could be the high-redshift counterparts of the low-redshift ultraluminous infrared galaxies (ULIRGs). Only one - SMM J02399-0136 - has yet been studied in detail. Three other very luminous high-redshift dusty galaxies with well determined spectral energy distributions in the mid-infrared waveband are known - IRAS F10214+4724, H1413+117 and APM 08279+5255. These were detected serendipitously rather than in unbiased surveys, and are all gravitationally lensed by a foreground galaxy. Two - H 1413+117 and APM 08279+5255 - appear to emit a significantly greater fraction of their luminosity in the mid-infrared waveband as compared with both low-redshift ULIRGs and high-redshift submillimetre-selected galaxies. This can be explained by a systematically greater lensing magnification of hotter regions of the source as compared with cooler regions: differential magnification. This effect can confuse the interpretation of the properties of distant ultraluminous galaxies that are lensed by intervening galaxies, but offers a possible way to investigate the temperature distribution of dust in their nuclei on scales of tens of parsecs.
description: 5 pages, 1 two-panel figure, 2 one-panel figures. In press at MNRAS. Final proof version
Replica Symmetry and Replica Symmetry Breaking for the Traveling Salesperson Problem
Creators: name: Schawe, Hendrik
name: Jha, Jitesh Kumar
name: Hartmann, Alexander K.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Computational Complexity (cs.CC)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: We study the energy landscape of the Traveling Salesperson problem (TSP) using exact ground states and a novel linear programming approach to generate excited states with closely defined properties. We look at four different ensembles, notably the classic finite dimensional Euclidean TSP and the mean-field-like (1,2)-TSP, which has its origin directly in the mapping of the Hamiltonian circuit problem on the TSP. Our data supports previous conjectures that the Euclidean TSP does not show signatures of replica symmetry breaking neither in two nor in higher dimension. On the other hand the (1,2)-TSP exhibits some signature which does not exclude broken replica symmetry, making it a candidate for further studies in the future.
description: 9 pages, 5 figures, 2 table
Highly optimized quantum circuits synthesized via data-flow engines
Creators: name: Rakyta, Peter
name: Morse, Gregory
name: Nádori, Jakab
name: Majnay-Takács, Zita
name: Mencer, Oskar
name: Zimborás, Zoltán
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: The formulation of quantum programs in terms of the fewest number of gate operations is crucial to retrieve meaningful results from the noisy quantum processors accessible these days. In this work, we demonstrate a use-case for Field Programmable Gate Array (FPGA) based data-flow engines (DFEs) to scale up variational quantum compilers to synthesize circuits up to $9$-qubit programs.This gate decomposer utilizes a newly developed DFE quantum computer simulator that is designed to simulate arbitrary quantum circuit consisting of single qubit rotations and controlled two-qubit gates on FPGA chips. In our benchmark with the QISKIT package, the depth of the circuits produced by the SQUANDER package (with the DFE accelerator support) were less by $97\%$ on average, while the fidelity of the circuits was still close to unity up to an error of $\sim10^{-4}$.
description: 28 pages, 3 figures, 1 table
The Influence of the Initial Mass Function on Populations of X-ray Binaries After a Burst of Star Formation
Creators: name: Popov, S. B.
name: Lipunov, V. M.
name: Prokhorov, M. E.
name: Postnov, K. A.
Publisher: name: arXiv
Year: 1998
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: In this article we use "Scenario Machine" - the population synthesis simulator- to calculate the evolution of the populations of the selected types of X-ray sources after the starformation burst with the total mass in binaries $1.5\cdot10^6 M_{\odot}$ during the first 20 Myr after the burst. Sources of the four types were calculated: transient sources- accreting neutron stars with Be- stars; accreting neutron stars in pair with supergiants; Cyg X-1-like sources- black holes with supergiants; superaccreting black holes. We used two values of the $α- coefficient$ in the mass-function: 2.35 (Salpeter's function) and 1.01 ("flat spectrum"). The calculations were made for two values of the upper limit of the mass-function: 120 and 30 $M_{\odot}$. For the flat spectrum the number of sources of all types significantly increased. Decreasing of the upper mass limit below the critical mass of a black hole formation increase (for the "flat spectrum") the number of transient sources with neutron stars up to $\approx 300$. We give approximating formulae for the time dependence of source numbers.
description: 6 pages, 2 PostScript figures, in the replaced version reference to the russian variant of the article was added
Discovery of a sub-Keplerian disk with jet around a 20Msun young star. ALMA observations of G023.01-00.41
Creators: name: Sanna, A.
name: Koelligan, A.
name: Moscadelli, L.
name: Kuiper, R.
name: Cesaroni, R.
name: Pillai, T.
name: Menten, K. M.
name: Zhang, Q.
name: Garatti, A. Caratti o
name: Goddi, C.
name: Leurini, S.
name: Carrasco-Gonzalez, C.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: It is well established that Solar-mass stars gain mass via disk accretion, until the mass reservoir of the disk is exhausted and dispersed, or condenses into planetesimals. Accretion disks are intimately coupled with mass ejection via polar cavities, in the form of jets and less collimated winds, which allow mass accretion through the disk by removing a substantial fraction of its angular momentum. Whether disk accretion is the mechanism leading to the formation of stars with much higher masses is still unclear. Here, we are able to build a comprehensive picture for the formation of an O-type star, by directly imaging a molecular disk which rotates and undergoes infall around the central star, and drives a molecular jet which arises from the inner disk regions. The accretion disk is truncated between 2000-3000au, it has a mass of about a tenth of the central star mass, and is infalling towards the central star at a high rate (6x10^-4 Msun/yr), as to build up a very massive object. These findings, obtained with the Atacama Large Millimeter/submillimeter Array at 700au resolution, provide observational proof that young massive stars can form via disk accretion much like Solar-mass stars.
description: 12 pages, 9 figures, 2 tables, minor revision included, accepted by Astronomy & Astrophysics
Cosmological Constraints from the Clustering Properties of the X-Ray Brightest Abell-type Cluster Sample
Creators: name: Borgani, S.
name: Plionis, M.
name: Kolokotronis, E.
Publisher: name: arXiv
Year: 1998
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present an analysis of the 2-point correlation function, of the X-ray Brightest Abell-type Cluster sample (XBACs; Ebeling et al. 1998) and of the cosmological constraints that it provides. If ξ(r) is modelled as a power-law, we find r_0=26.0 +/- 4.5 Mpc/h and γ=2.0 +/-0.4, with errors corresponding to 2σuncertainties. Only a marginal increase of the correlation amplitude is found as the flux limit is increased from 5x10^{-12} cgs to 12x10^{-12} cgs, thus indicating a weak dependence of the correlation amplitude on the cluster X-ray luminosity. Furthermore, we present a method to predict correlation functions for flux-limited X-ray cluster samples from cosmological models. The method is based on the analytical recipe by Mo & White (1996) and on an empirical approach to convert cluster fluxes into masses. We use a maximum-likelihood method to place constraints on the model parameter space. We find that the shape parameter of the power spectrum lies in the 2σrange 0.05
description: 10 pages, 9 figures, LateX, uses psfig.tex and mn.sty, to appear in MNRAS
The exceptional Lie algebra $\mathfrak{g}_2$ generated by three generators subject to quadruple relations
Creators: name: Stoilova, N. I.
name: Van der Jeugt, J.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Rings and Algebras (math.RA)
subject: FOS: Mathematics
subject: 17B25, 17B01

description: In this short communication we show how the Lie algebra $\mathfrak{g}_2$ can easily be described as a free Lie algebra on 3 generators, subject to some simple quadruple relations for these generators.
Additional file 8: of The alternative sigma factor RpoQ regulates colony morphology, biofilm formation and motility in the fish pathogen Aliivibrio salmonicida
Creators: name: Khider, Miriam
name: Willassen, Nils
name: Hansen, Hilde
Publisher: name: figshare
Year: 2018
Subjects: subject: Microbiology
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Evolutionary Biology
subject: Ecology
subject: 69999 Biological Sciences not elsewhere classified
subject: Developmental Biology

description: Figure S5. The figure shows alignment and phylogeny of RpoQ, RpoS and RpoX. (DOCX 699 kb)
Constructing multi-loop scattering amplitudes with manifest singularity structure
Creators: name: Schabinger, Robert M.
Publisher: name: arXiv
Year: 2018
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The infrared exponentiation properties of dimensionally-regularized multi-loop scattering amplitudes are typically hidden at the level of the integrand, materializing only after integral evaluation. We address this long-standing problem by introducing an appropriate integral basis which is simultaneously finite and uniform weight. As an example, we cast the integrand for the QCD corrections to the two-loop massless quark electromagnetic form factor into a form where it is manifest that the $ε^{-4}$ and $ε^{-3}$ pole terms arise from the $ε$ expansion of the square of our one-loop master integral.
description: 8 pages; in v2: references added relative to v1; in v3: introduction expanded and examples added along the lines suggested by the referees, further references and note added
The X-ray Luminosity Function of Bright Clusters in the Local Universe
Creators: name: De Grandi, S.
name: Guzzo, L.
name: Böhringer, H.
name: Molendi, S.
name: Chincarini, G.
name: Collins, C.
name: Cruddace, R.
name: Neumann, D.
name: Schindler, S.
name: Schuecker, P.
name: Voges, W.
Publisher: name: arXiv
Year: 1998
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present the X-ray luminosity function (XLF) for clusters of galaxies derived from the RASS1 Bright Sample. The sample, selected from the ROSAT All-Sky Survey in a region of 2.5 sr within the southern Galactic cap, contains 130 clusters with flux limits in the range ~ 3-4 x 10^-12 ergs/cm^2/s in the 0.5-2.0 keV band. A maximum-likelihood fit with a Schechter function of the XLF over the entire range of luminosities (0.045 - 28. x 10^44 ergs/s), gives alpha = 1.52 +/- 0.11, L_* = 3.80 +0.70 -0.55 x 10^44 ergs/s, and A = 5.07 +/- 0.45 x 10^-7 Mpc^-3 (10^44 ergs/s)^(α-1). We investigate possible evolutionary effects within the sample, out to our redshift limit (z ~ 0.3), finding no evidence for evolution. Our results are in good agreement with other local estimates of the XLF, implying that this statistic for the local universe is now well determined. Comparison with XLFs for distant clusters (0.3 < z < 0.6), shows that no evolution is present for L_X < 10^{44} ergs/s. However, we detect differences at the 3 sigma level, between our local XLF and the distant one estimated by Henry et al. for the EMSS sample. This difference is still present when considering the EMSS sample revised by Nichol et al.
description: 13 pages with 3 figures included, LaTex, aaspp4.sty and epsf.sty, accepted for publication in ApJ Letters, only minor changes, added references
Universal correlation between electronic factors and solute-defect interactions in bcc refractory metals
Creators: name: Hu, Yong-Jie
name: Zhao, Ge
name: Zhang, Baiyu
name: Yang, Chaoming
name: Liu, Zi-Kui
name: Qian, Xiaofeng
name: Qi, Liang
Publisher: name: arXiv
Year: 2018
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: The interactions between solute atoms and crystalline defects such as vacancies, dislocations, and grain boundaries play an essential role in determining physical, chemical and mechanical properties of solid-solution alloys. Here we present a universal correlation between two electronic factors and the solute-defect interaction energies in binary alloys of body-centered-cubic (bcc) refractory metals (such as W and Ta) with transition-metal substitutional solutes. One electronic factor is the bimodality of the d-orbital local density of states for a matrix atom at the substitutional site, and the other is related to the hybridization strength between the valance sp- and d-bands for the same matrix atom. Remarkably, the correlation is independent of the types of defects and the locations of substitutional sites, following a linear relation for a particular pair of solute-matrix elements. Our findings provide a novel and quantitative guidance to engineer the solute-defect interactions in alloys based on electronic structures.
A General Bayesian Framework to Account for Foreground Map Errors in Global 21-cm Experiments
Creators: name: Pagano, Michael
name: Sims, Peter
name: Liu, Adrian
name: Anstey, Dominic
name: Handley, Will
name: Acedo, Eloy De Lera
Publisher: name: arXiv
Year: 2022
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Measurement of the global 21-cm signal during Cosmic Dawn (CD) and the Epoch of Reionization (EoR) is made difficult by bright foreground emission which is 2-5 orders of magnitude larger than the expected signal. Fitting for a physics-motivated parametric forward model of the data within a Bayesian framework provides a robust means to separate the signal from the foregrounds, given sufficient information about the instrument and sky. It has previously been demonstrated that, within such a modelling framework, a foreground model of sufficient fidelity can be generated by dividing the sky into $N$ regions and scaling a base map assuming a distinct uniform spectral index in each region. Using the Radio Experiment for the Analysis of Cosmic Hydrogen (REACH) as our fiducial instrument, we show that, if unaccounted-for, amplitude errors in low-frequency radio maps used for our base map model will prevent recovery of the 21-cm signal within this framework, and that the level of bias in the recovered 21-cm signal is proportional to the amplitude and the correlation length of the base-map errors in the region. We introduce an updated foreground model that is capable of accounting for these measurement errors by fitting for a monopole offset and a set of spatially-dependent scale factors describing the ratio of the true and model sky temperatures, with the size of the set determined by Bayesian evidence-based model comparison. We show that our model is flexible enough to account for multiple foreground error scenarios allowing the 21-cm sky-averaged signal to be detected without bias from simulated observations with a smooth conical log spiral antenna.
description: 18 pages, 13 figures
Gravitational Lensing Limits on the Average Redshift of Submillimeter Sources
Creators: name: Cooray, Asantha R.
Publisher: name: arXiv
Year: 1998
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The submillimeter universe has now been explored with the Submillimeter Common User Bolometer Array (SCUBA) camera on the James Clerk Maxwell Telescope, and a claim has been made to the presence of a new population of optically unidentified starforming galaxies at high redshifts (z \gtrsim 3). Such a population dramatically alters current views on the star formation history of the universe as well as galaxy formation and evolution. Recently, new radio identifications of the Hubble Deep Field submm sources have led to the suggestion that some of these sources are at low redshifts, however, submm source redshift distribution is still not well determined. Here, we present an upper limit to the average redshift by comparing the expected number of gravitationally lensed submm sources due to foreground cluster potentials to current observed statistics of such lensed sources. The upper limit depends on the cosmological parameters, and at the 68% confidence level, < 3.1, 4.8, 5.2, or 8.0 for (Omega,Lambda) values of (0.3,0.7), (0.5,0.5), (0.3,0.0) or (1.0,0.0) respectively. These upper limits are consistent with redshift distribution for 850 micron sources implied by starformation history models based on measured background radiation at far-infrared and submm wavelengths.
description: Accepted for publication in ApJ Letters (4 pages, including 1 table)
Simultaneous model calibration and source inversion in atmospheric dispersion models
Creators: name: Garcia, Juan G.
name: Hosseini, Bamdad
name: Stockie, John M
Publisher: name: arXiv
Year: 2018
Subjects: subject: Numerical Analysis (math.NA)
subject: Atmospheric and Oceanic Physics (physics.ao-ph)
subject: Geophysics (physics.geo-ph)
subject: Applications (stat.AP)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences
subject: 62F15, 65M08, 65M32, 86A10

description: We present a cost-effective method for model calibration and solution of source inversion problems in atmospheric dispersion modelling. We use Gaussian process emulations of atmospheric dispersion models within a Bayesian framework for solution of inverse problems. The model and source parameters are treated as unknowns and we obtain point estimates and approximation of uncertainties for sources while simultaneously calibrating the forward model. The method is validated in the context of an industrial case study involving emissions from a smelting operation for which cumulative monthly measurements of zinc particulate depositions are available.
Temporal Evolution of the Pulse Width in GRBs
Creators: name: Ramirez-Ruiz, E.
name: Fenimore, E. E.
Publisher: name: arXiv
Year: 1998
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Many cosmological models of GRBs envision the energy source to be a cataclysmic stellar event leading to a relativistically expanding fireball. Particles are thought to be accelerated at shocks and produce nonthermal radiation. The highly variable temporal structure observed in most GRBs has significantly constrained models. By using different methods of statistical analysis in the time domain we show that the width of the pulses in GRBs time histories remain remarkably constant throughout the classic GRB phase. Peaks at the end of a burst have the same average duration to within a few percent as the peaks at the start of the burst. For emission sites that lie on a relativistically expanding shell, peaks should grow in duration because of deceleration. We find no deceleration over at least 2/3 of the burst duration. For emission sites that occupy a spread of angles on a shell, the curvature should cause the later peaks to grow in duration. Since we see no such growth, we can limit the total angular size of the shell to be substantially smaller than Γ^{-1} where Γis the bulk Lorentz factor. This lack of temporal evolution of the pulse width should be explained by any fireball shock scenario.
description: 2 pages, 2 figures. Latex, Submitted to A&A, Proc. of Rome Conf. on Gamma-ray Bursts in the Afterglow Era
Loxia cyanea Linnaeus, 1758, spec. nov.
Creators: name: Linnaeus, Carolus
Publisher: name: Laurentius Salvius
Year: 1758
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Aves
Passeriformes
Fringillidae
Loxia
Loxia cyanea

description: Loxia cyanea [spec. nov.]
L. caerulea, remigibus rectricibusque nigris. Chinens. Lagerstr. 18.
Coccothraustes caeruleus. Edw. av. 125. t. 125.
Habitat in Angola.
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 174, DOI: 10.5962/bhl.title.542, http://zenodo.org/record/3922206
title: Organic waste management for energy production in Crete
title: Διαχείριση οργανικών αποβλήτων για παραγωγή ενέργειας στην Κρήτη
Creators: name: Σαριδακης Κωνσταντινος
Publisher: name: Technical University of Crete
Year: 2021

description: Olive oil production is one of the most important industries in the Mediterranean region and especially in Greece, that belongs to the top three countries with the biggest olive oil production alongside Spain and Italy.
However, olive oil production also results in organic waste which, up until now, is disposed into the ecosystem and has contributed towards pollution of the environment at a significant level E specially in Crete, a considerable amount of olive oil mill waste ends up in rivers and the sea. The above mentioned organic waste due to its heavy load of chemical composition, can be used as a raw material for biogas production. The main purpose of this master thesis, is not to examine the magnitude of the environmental pollution but to provide an alternative olive oil waste management solution by taking advantage of the existing process of anaerobic digestion of organic waste to biogas Emphasis will be given on the island of Crete, as olive oil production is considered to be the main agricultural activity. This research will try to tackle two serious problems of the island, the organic waste management and the energy supply autonomy T he possibility for an alternative combination that provides a solution to both the aforementioned problems will be examined On top of that, considering the inevitable exhaustion of fossil fuels and
the recent market trend of switching to renewable sources investments, a detailed business plan will be developed, whose all paramete rs will be examined in order for this solution to provide realistic and profitable opportunities for business investment s on the island For this reason, each stage and factor will be thoroughly analyzed, starting with the production of olive mill waste vo lume o n the island Also, the biofuel production capabilities will be assessed the market demand, the potential profits and also the initial capital and investments that this project will require
As far as the latter is concerned factors such as the legal frame and potential state support or European funding will be also considered In addition, the necessary equipment and technologies will also be explored Finally, an attempt will be made to generalize the conclusions and indica te how applicable the latter are into the broader range of Mediterranean olive oil production countries.
The vector form of Kundu-Eckhaus equation and its simplest solutions
Creators: name: Smirnov, Aleksandr O.
name: Caplieva, Aleksandra A.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: In our work a hierarchy of integrable vector nonlinear differential equations depending on the functional parameter $r$ is constructed using a monodromy matrix. The first equation of this hierarchy for $r=α(\mathbf{p}^t\mathbf{q})$ is vector analogue of the Kundu-Eckhaus equation. When $α=0$, the equations of this hierarchy turn into equations of the Manakov system hierarchy. New elliptic solutions to vector analogue of the Kundu-Eckhaus and Manakov system are presented. In conclusion, it is shown that there exist linear transformations of solutions to vector integrable nonlinear equations into other solutions to the same equations.
description: 20 pages, 3 figures
Additional file 2: of Systematic review of health state utility values in metastatic non-small cell lung cancer with a focus on previously treated patients
Creators: name: Noman Paracha
name: Abdulla, Ahmed
name: MacGilchrist, Katherine
Publisher: name: figshare
Year: 2018
Subjects: subject: Space Science
subject: Medicine
subject: Pharmacology
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Cancer

description: Table S2. Listing of first-line mNSCLC studies with utility data excluded at second pass [80â 100]. (DOCX 84 kb)
Polarized CO emission from molecular clouds
Creators: name: Greaves, J. S.
name: Holland, W. S.
name: Friberg, P.
name: Dent, W. R. F.
Publisher: name: arXiv
Year: 1998
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Linearly polarized, non-masing, rotational lines have been detected for the first time in the interstellar medium. This effect occurs in molecular clouds with a magnetic field, and traces the field direction, offering an alternative technique to dust emission polarimetry. The line polarization mechanism is similar to that in masers, but with lower degrees of polarization (~1%). We have detected the effect towards the Galactic Centre and its surrounding `2 pc ring', and in the molecular clouds S140 and DR21 (tentatively), in the lines CO J=2-1 and J=3-2, and 13CO J=2-1. The deduced magnetic field directions agree well with previous dust polarimetry results, confirming that the line polarization is a real effect. This new technique will be useful in sources that are too faint for dust polarimetry, and can also be used to investigate 3-dimensional morphology of magnetic fields, where the velocity structure of the clouds is known.
description: 15 pages, 1 figure, to be published in ApJ Letters