cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Orthogonal Laurent polynomials in unit circle, extended CMV ordering and 2D Toda type integrable hierarchies
Creators: name: Alvarez-Fernandez, Carlos
name: Manas, Manuel
Publisher: name: arXiv
Year: 2012
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: Mathematical Physics (math-ph)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: Orthogonal Laurent polynomials in the unit circle and the theory of Toda-like integrable systems are connected using the Gauss--Borel factorization of a Cantero-Moral-Velazquez moment matrix, which is constructed in terms of a complex quasi-definite measure supported in the unit circle. The factorization of the moment matrix leads to orthogonal Laurent polynomials in the unit circle and the corresponding second kind functions. Jacobi operators, 5-term recursion relations and Christoffel-Darboux kernels, projecting to particular spaces of truncated Laurent polynomials, and corresponding Christoffel-Darboux formulae are obtained within this point of view in a completely algebraic way. Cantero-Moral-Velazquez sequence of Laurent monomials is generalized and recursion relations, Christoffel-Darboux kernels, projecting to general spaces of truncated Laurent polynomials and corresponding Christoffel-Darboux formulae are found in this extended context. Continuous deformations of the moment matrix are introduced and is shown how they induce a time dependant orthogonality problem related to a Toda-type integrable system, which is connected with the well known Toeplitz lattice. Using the classical integrability theory tools the Lax and Zakharov-Shabat equations are obtained. The dynamical system associated with the coefficients of the orthogonal Laurent polynomials is explicitly derived and compared with the classical Toeplitz lattice dynamical system for the Verblunsky coefficients of Szegő polynomials for a positive measure. Discrete flows are introduced and related to Darboux transformations. Finally, the representation of the orthogonal Laurent polynomials (and its second kind functions), using the formalism of Miwa shifts, in terms of $τ$-functions is presented and bilinear equations are derived.
Search for z~7 Ly-alpha emitters with Suprime-Cam at the Subaru Telescope
Creators: name: Hibon, Pascale
name: Kashikawa, Nobunari
name: Willott, Christopher
name: Iye, Masanori
name: Shibuya, Takatoshi
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We report a search for z=7 Ly-alpha emitters (LAEs) using a custom-made Narrow-Band filter, centered at 9755 Angstroms, with the instrument Suprime-Cam installed at the Subaru telescope. We observed two different fields and obtained two sample of 7 Ly-alpha emitters of which 4 are robust in each field. We are covering the luminosity range of 9.10^{42} - 2.10^{43} erg/s in comoving volumes of ~ 4.10^{5} and 4.3.10^{5} Mpc^{3}. From this result, we derived possible z~7 Ly-alpha luminosity functions for the full samples and for a subsample of 4 objects in each field. We do not observe, in each case, any strong evolution between the z=6.5 and z~7 Ly-alpha luminosity functions. Spectroscopic confirmation for these candidate samples is required to establish a definitive measure of the luminosity function at z~7.
description: accepted for publication in ApJ
Sorafenib-Induced Acute Pancreatitis
Creators: name: Saadati, Hamid
name: Saif, Muhammad Wasif
Publisher: name: JOP. Journal of the Pancreas
Year: 2010
Subjects: Carcinoma, Hepatocellular; Pancreatitis; sorafenib

description: No abstract available.

Image: Sorafenib BRAF labeled (Author: Nhevitt; Wikimedia Commons)
description: JOP. Journal of the Pancreas, Vol 11, No 3 (2010): May - p. 199-298
Cosmological evolution of finite temperature Bose-Einstein Condensate dark matter
Creators: name: Harko, Tiberiu
name: Mocanu, Gabriela
Publisher: name: arXiv
Year: 2012
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Quantum Gases (cond-mat.quant-gas)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Once the temperature of a bosonic gas is smaller than the critical, density dependent, transition temperature, a Bose - Einstein Condensation process can take place during the cosmological evolution of the Universe. Bose - Einstein Condensates are very strong candidates for dark matter, since they can solve some major issues in observational astrophysics, like, for example, the galactic core/cusp problem. The presence of the dark matter condensates also drastically affects the cosmic history of the Universe. In the present paper we analyze the effects of the finite dark matter temperature on the cosmological evolution of the Bose-Einstein Condensate dark matter systems. We formulate the basic equations describing the finite temperature condensate, representing a generalized Gross-Pitaevskii equation that takes into account the presence of the thermal cloud in thermodynamic equilibrium with the condensate. The temperature dependent equations of state of the thermal cloud and of the condensate are explicitly obtained in an analytical form. By assuming a flat Friedmann-Robertson-Walker (FRW) geometry, the cosmological evolution of the finite temperature dark matter filled Universe is considered in detail in the framework of a two interacting fluid dark matter model, describing the transition from the initial thermal cloud to the low temperature condensate state. The dynamics of the cosmological parameters during the finite temperature dominated phase of the dark matter evolution are investigated in detail, and it is shown that the presence of the thermal excitations leads to an overall increase in the expansion rate of the Universe.
description: 14 pages, 11 figures, accepted for publication in PRD
Gravitational Vacuum Condensate Stars
Creators: name: Mottola, Emil
Publisher: name: arXiv
Year: 2023
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Gravitational vacuum condensate stars, proposed as the endpoint of gravitational collapse consistent with quantum theory, are reviewed. Gravastars are cold, low entropy, maximally compact objects characterized by a surface boundary layer and physical surface tension instead of an event horizon. Within this thin boundary layer the effective vacuum energy changes rapidly, such that the interior of a non-rotating gravastar is a non-singular static patch of de Sitter space with eq. of state p=-rho. Remarkably, essentially this same result is obtained by extrapolating Schwarzschild's 1916 constant density interior solution to its compact limit, showing how the black hole singularity theorems and the Buchdahl compactness bound are evaded. The surface stress tensor on the horizon is determined by a modification of the Lanczos-Israel junction conditions for null hypersurfaces, which is applied to rotating gravastar solutions as well. The fundamental basis for the quantum phase transition at the horizon is the stress tensor of the conformal anomaly, depending upon a new light scalar field in the low energy effective action for gravity. This scalar conformalon field allows the effective value of the vacuum energy described as a condensate of an exact 4-form abelian gauge field to change at the horizon. The resulting effective theory thus replaces the fixed constant Lambda of classical general relativity, and its apparently unnaturally large sensitivity to UV physics, with a dynamical condensate whose ground state value in empty flat space is zero identically. This provides both a solution to the cosmological constant problem and an effective Lagrangian dynamical framework for the boundary layer and interior of gravitational condensate stars. The status of present observational constraints and prospects for detection of gravastars through their gravitational wave and echo signatures are discussed.
description: Review article published as Chapter 8, pp. 283-352 in "Regular Black Holes: Towards a New Paradigm of Gravitational Collapse," C. Bambi editor (Springer), 69 pages, 8 figures, Typos fixed, References added and updated
A Case of Down Syndrome Who Developed Pancreatic Cancer: A Case Report and Review of Literature
Creators: name: Purvey, Sneha
name: Hanna, Mina
name: Shaib, Walid
name: Saif, Muhammad Wasif
Publisher: name: JOP. Journal of the Pancreas
Year: 2010
Subjects: Pancreatic Neoplasms; Down Syndrome; Weight Loss

description: No abstract available.

Image: Trisomy 21 chromosome - Down syndrome (Author: Alexey Ratnikov; Wikimedia Commons)
description: JOP. Journal of the Pancreas, Vol 11, No 3 (2010): May - p. 199-298
title: HBIM για πολιτιστική κληρονομία – Προκλήσεις κατά την εφαρμογή του – Περίπτωση Ναού της Δήμητρας στην Νάξο
titleType: AlternativeTitle
Creators: name: Taliotis, Nikolas
Publisher: name: National Technological University of Athens
Year: 2025
Subjects: BIM
HBIM
Scan to BIM

description: Εθνικό Μετσόβιο Πολυτεχνείο--Μεταπτυχιακή Εργασία. Διεπιστημονικό-Διατμηματικό Πρόγραμμα Μεταπτυχιακών Σπουδών (Δ.Π.Μ.Σ.) “Γεωπληροφορική”
Liquid and crystal phase of dipolar fermions in two dimensions
Creators: name: Matveeva, N.
name: Giorgini, S.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: The liquid and crystal phase of a single-component Fermi gas with dipolar interactions are investigated using quantum Monte Carlo methods in two spatial dimensions and at zero temperature. The dipoles are oriented by an external field perpendicular to the plane of motion, resulting in a purely repulsive 1/r^3 interaction. In the liquid phase we calculate the equation of state as a function of the interaction strength and other relevant properties characterizing the Fermi-liquid behavior: effective mass, discontinuity at the Fermi surface and pair correlation function. In the high density regime we calculate the equation of state of the Wigner crystal phase and the critical density of the liquid to solid first order phase transition. Close to the freezing density we also search for the existence of a stripe phase, but such a phase is never found to be energetically favorable.
description: 5 pages, 5 figures
Options for the Treatment of Gemcitabine-Resistant Advanced Pancreatic Cancer: Are We There Yet?
Creators: name: Saif, Muhammad Wasif
Publisher: name: JOP. Journal of the Pancreas
Year: 2010
Subjects: erlotinib; gemcitabine; Pancreatic Neoplasms; Salvage Therapy; Treatment Failure

description: No abstract available.

Image: Yale Cancer Center. New Haven, CT, USA.
description: JOP. Journal of the Pancreas, Vol 11, No 3 (2010): May - p. 199-298
Pilot study on geometrical movement in lucid dreams
Creators: name: Hamilton, Nigel
name: Waggoner, Robert
Publisher: name: International Journal of Dream Research
Year: 2020

description: In this pilot study a group of volunteer lucid dreamers were recruited to trace out specific simple symmetrical geometric structures, whilst lucid in their dreams. The experiment was a joint effort between the Dream Research Institute (DRI) in London, and Robert Waggoner, co-editor of the Lucid Dreaming Experience magazine (LDE). The purpose was to explore a hypothetical observation by psychotherapist Nigel Hamilton that psychotherapy clients who ultimately completed a balanced geometric movement in their non-lucid dream series, then experienced greater psychological balance and progress in therapy (Hamilton 2014). This novel pilot study sought to find whether tracing out simple symmetrical geometrical figures in the lucid dream produced any significant effect on or within the dream space. Two analytical methods, including a contents analysis revealed the significance of light/colour emerging in the dream imagery during the completion of the lucid dream exercises, as well as the addition of symbols of symmetry in the lucid dream imagery. By contrast, obstacles and a relative lack of colour/light appearing during the exercise tended to be associated with a lack of symmetry in the imagery and a greater difficulty in completing the geometric figures. Results also suggest that the lucid dreamer does not control the lucid dream, instead they influence the dream and frequently relate to unconscious activity in response.
description: International Journal of Dream Research, Vol 13, No 2 (October 2020)
On generating Sobolev orthogonal polynomials
Creators: name: Van Buggenhout, Niel
Publisher: name: arXiv
Year: 2023
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics
subject: 65F18 15B99 42C05

description: Sobolev orthogonal polynomials are polynomials orthogonal with respect to a Sobolev inner product, an inner product in which derivatives of the polynomials appear. They satisfy a long recurrence relation that can be represented by a Hessenberg matrix. The problem of generating a finite sequence of Sobolev orthogonal polynomials can be reformulated as a matrix problem. That is, a Hessenberg inverse eigenvalue problem, where the Hessenberg matrix of recurrences is generated from certain known spectral information. Via the connection to Krylov subspaces we show that the required spectral information is the Jordan matrix containing the eigenvalues of the Hessenberg matrix and the normalized first entries of its eigenvectors. Using a suitable quadrature rule the Sobolev inner product is discretized and the resulting quadrature nodes form the Jordan matrix and associated quadrature weights are the first entries of the eigenvectors. We propose two new numerical procedures to compute Sobolev orthonormal polynomials based on solving the equivalent Hessenberg inverse eigenvalue problem.
description: 24 pages, 5 figures, 2 tables
In Response to 'Options for the Treatment of Gemcitabine-Resistant Advanced Pancreatic Cancer: Are We There Yet?'
Creators: name: Gounaris, Ioannis
name: Zaki, Kamarul
name: Corrie, Pippa
Publisher: name: JOP. Journal of the Pancreas
Year: 2010
Subjects: Drug Therapy; gemcitabine; Neoplasm Metastasis; Pancreatic Neoplasms

description: No abstract available.

Image: Addenbrooke’s Hospital. Cambridge, United Kingdom.
description: JOP. Journal of the Pancreas, Vol 11, No 3 (2010): May - p. 199-298
The ISM in distant star-forming galaxies: Turbulent pressure, fragmentation and cloud scaling relations in a dense gas disk at z=2.3
Creators: name: Swinbank, Mark
name: Papadopoulos, Padelis
name: Cox, Pierre
name: Krips, Melanie
name: Ivison, Rob
name: Smail, Ian
name: Thomson, Alasdair
name: Neri, Roberto
name: Richard, Johan
name: Ebeling, Harald
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We have used the IRAM Plateau de Bure Interferometer and the Expanded Very Large Array to obtain a high resolution map of the CO(6-5) and CO(1-0) emission in the lensed, star-forming galaxy SMMJ2135-0102 at z=2.32. The kinematics of the gas are well described by a model of a rotationally-supported disk with an inclination-corrected rotation speed, v_rot = 320+/-25km/s, a ratio of rotational- to dispersion- support of v/sigma=3.5+/-0.2 and a dynamical mass of 6.0+/-0.5x10^10Mo within a radius of 2.5kpc. The disk has a Toomre parameter, Q=0.50+/-0.15, suggesting the gas will rapidly fragment into massive clumps on scales of L_J ~ 400pc. We identify star-forming regions on these scales and show that they are 10x denser than those in quiescent environments in local galaxies, and significantly offset from the local molecular cloud scaling relations (Larson's relations). The large offset compared to local molecular cloud linewidth-size scaling relations imply that supersonic turbulence should remain dominant on scales ~100x smaller than in the kinematically quiescent ISM of the Milky Way, while the molecular gas in SMMJ2135 is expected to be ~50x denser than that in the Milky Way on all scales. This is most likely due to the high external hydrostatic pressure we measure for the interstellar medium (ISM), P_tot/kB ~ (2+/-1)x10^7K/cm3. In such highly turbulent ISM, the subsonic regions of gravitational collapse (and star-formation) will be characterised by much higher critical densities, n_crit>=10^8/cm3, a factor ~1000x more than the quiescent ISM of the Milky Way.
description: ApJ in press. 15 pages, 7 figures
Inhalt
Creators: name: Redaktion, Die
Publisher: name: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
Year: 2020

description: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege, Bd. 10 Nr. 9 (1957): Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
Identification of important VO spectral services benefiting from deployment on the Grid
Creators: name: Škoda, Petr
Publisher: name: arXiv
Year: 2011
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: The majority of VO-compatible spectra handling applications operates only with a few spectra entirely downloaded from single or several SSAP servers. We try to identify the scientific cases which could immediately benefit from future SSAP applications designed for GRID deployment. Their key feature is the sophisticated spectra pre-selection and preprocessing done on distributed servers using the intelligent agent summarising the results and performing final high-level processing or analysis.
description: 9 pages, 4 figures
Eberhard Hempel, Gaetano Chiaveri, der Architekt der katholischen Hofkirch zu Dresden
Creators: name: Hubala, Erich
Publisher: name: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
Year: 2020

description: Rezension zu: Eberhard Hempel, Gaetano Chiaveri, der Architekt der katholischen Hofkirch zu Dresden. Mit bautechnischen und zeichnerischen Beiträgen von Walter Krönert. Dresden 1956. 264 S., 164 Text-Abb. und 32 Tafeln.
description: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege, Bd. 10 Nr. 9 (1957): Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
Tyrosine Kinase Inhibitors and Acute Pancreatitis
Creators: name: Pezzilli, Raffaele
name: Corinaldesi, Roberto
name: Morselli-Labate, Antonio Maria
Publisher: name: JOP. Journal of the Pancreas
Year: 2010
Subjects: 4-amino-5-(4-methylphenyl)-7-(tert-butyl)pyrazolo(3,4-d)pyrimidine; Amylases; Clinical Trials; Controlled Clinical Trial; Drug Toxicity; Lipase; Pancreatitis

description: JOP. Journal of the Pancreas, Vol 11, No 3 (2010): May - p. 199-298
Early warning signals for critical transitions: A generalized modeling approach
Creators: name: Lade, Steven J.
name: Gross, Thilo
Publisher: name: arXiv
Year: 2011
Subjects: subject: Populations and Evolution (q-bio.PE)
subject: Dynamical Systems (math.DS)
subject: FOS: Biological sciences
subject: FOS: Mathematics

description: Max Planck Institute for the Physics of Complex Systems, Noethnitzer Str. 38, 01187 Dresden, Germany
Hot articles recently published in the field of pancreatology
Creators: name: ., . .
Publisher: name: JOP. Journal of the Pancreas
Year: 2010
Subjects: Collected Works; Pancreas; Pancreatic Diseases; Pancreatic Neoplasms

description: JOP. Journal of the Pancreas, Vol 11, No 3 (2010): May - p. 199-298
Spin-1/2 XXZ chain coupled to two Lindblad baths: Constructing nonequilibrium steady states from equilibrium correlation functions
Creators: name: Heitmann, Tjark
name: Richter, Jonas
name: Jin, Fengping
name: Nandy, Sourav
name: Lenarčič, Zala
name: Herbrych, Jacek
name: Michielsen, Kristel
name: De Raedt, Hans
name: Gemmer, Jochen
name: Steinigeweg, Robin
Publisher: name: arXiv
Year: 2023
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: State-of-the-art approaches to extract transport coefficients of many-body quantum systems broadly fall into two categories: (i) they target the linear-response regime in terms of equilibrium correlation functions of the closed system; or (ii) they consider an open-system situation typically modeled by a Lindblad equation, where a nonequilibrium steady state emerges from driving the system at its boundaries. While quantitative agreement between (i) and (ii) has been found for selected model and parameter choices, also disagreement has been pointed out in the literature. Studying magnetization transport in the spin-1/2 XXZ chain, we here demonstrate that at weak driving, the nonequilibrium steady state in an open system, including its buildup in time, can remarkably be constructed just on the basis of correlation functions in the closed system. We numerically illustrate this direct correspondence of closed-system and open-system dynamics, and show that it allows the treatment of comparatively large open systems, usually only accessible to matrix product state simulations. We also point out potential pitfalls when extracting transport coefficients from nonequilibrium steady states in finite systems.
description: 8 pages, 4 figures (+ 4 pages, 4 figures)
Position sensitive SiPM detector for Cherenkov applications
Creators: name: Gruber, L.
name: Ahmed, G. S. M.
name: Brunner, S. E.
name: Bühler, P.
name: Marton, J.
name: Suzuki, K.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: A prototype of a position sensitive photo-detector with 5.6 x 5.6 cm2 detection area readout with 64 Hamamatsu MPPCs (S10931-100P) with 3 x 3 mm2 active area each has been built and tested. The photo-sensors are arranged in a 8 x 8 array with a quadratic mirror light guide on top. The module is currently readout by in-house developed preamplifier boards but employing existing ASIC chips optimized for SiPM readout is also planned. Such a device is one of the candidates to be used for photon detection in the PANDA DIRC detectors.
title: Climate prediction S&T digest : NWS science & technology infusion climate bulletin supplement
title: 40th NOAA Climate Diagnostics and Prediction Workshop special issue
titleType: AlternativeTitle
Creators: name: Climate Diagnostics And Prediction Workshop (40th : 2015 : Denver, Colo.)
Publisher: name: U.S. Department of Commerce, National Oceanic and Atmospheric Administration, National Weather Service, Office of Science and Technology.
Year: 2016
Subjects: subject: Climatic changes--United States--Forecasting--Congresses.
subject: Numerical weather forecasting--United States--Congresses.

description: NOAA's 40th Climate Diagnostics and Prediction Workshop was held in Denver, Colorado on 26-29 October 2015. The workshop was hosted by the Physical Sciences Division (PSD) of NOAA's Earth Systems Research Laboratory (ESRL) and co-sponsored by the Climate Prediction Center (CPC) of the National Centers for Environmental Prediction (NCEP) and the Climate Services Division (CSD) of the National Weather Service (NWS). The workshop addressed the status and prospects for advancing climate prediction, monitoring, and diagnostics, and focused on five major themes: 1. The evolution of climate diagnostics and prediction over the last 40 years; 2. Extremes and risk management: knowledge and products to connect the diagnostics and prediction of extremes with preparedness and adaptation strategies; 3. The prediction, attribution, and analysis of drought and pluvial in the framework of climate variability and change; 4. Diagnostics and prediction of high impact extreme climate events; 5. Prediction and attribution of Arctic climate variability, and the linkages of Arctic variability to lower latitudes. The workshop featured daytime oral presentations, invited speakers, and panel discussions with a poster session event held in the evening on 27 October. This Digest is a collection of extended summaries of the presentations contributed by participants. The workshop is continuing to grow and expected to provide a stimulus for further improvements in climate monitoring, diagnostics, prediction, applications and services.
Dark-sector seeded solution to the strong CP problem
Creators: name: Câmara, H. B.
name: Joaquim, F. R.
name: Valle, J. W. F.
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We propose a novel realization of the Nelson-Barr mechanism "seeded'' by a dark sector containing scalars and vector-like quarks. Charge-parity (CP) and a $\mathcal{Z}_8$ symmetry are spontaneously broken by the complex vacuum expectation value of a singlet scalar, leaving a residual $\mathcal{Z}_2$ symmetry that stabilizes dark matter (DM). A complex Cabibbo-Kobayashi-Maskawa matrix arises via one-loop corrections to the quark mass matrix mediated by the dark sector. In contrast with other proposals where non-zero contributions to the strong CP phase arise at the one-loop level, in our case this only occurs at two loops, enhancing naturalness. Our scenario also provides a viable weakly interacting massive particle scalar DM candidate.
description: 8 LaTeX pages; 3 figures. Minor changes, typos corrected and references added. Matches version published in PRD
Analysis of Round Off Errors with Reversibility Test as a Dynamical Indicator
Creators: name: Faranda, Davide
name: Mestre, Martin Federico
name: Turchetti, Giorgio
Publisher: name: arXiv
Year: 2012
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics

description: We compare the divergence of orbits and the reversibility error for discrete time dynamical systems. These two quantities are used to explore the behavior of the global error induced by round off in the computation of orbits. The similarity of results found for any system we have analysed suggests the use of the reversibility error, whose computation is straightforward since it does not require the knowledge of the exact orbit, as a dynamical indicator. The statistics of fluctuations induced by round off for an ensemble of initial conditions has been compared with the results obtained in the case of random perturbations. Significant differences are observed in the case of regular orbits due to the correlations of round off error, whereas the results obtained for the chaotic case are nearly the same. Both the reversibility error and the orbit divergence computed for the same number of iterations on the whole phase space provide an insight on the local dynamical properties with a detail comparable with other dynamical indicators based on variational methods such as the finite time maximum Lyapunov characteristic exponent, the mean exponential growth factor of nearby orbits and the smaller alignment index. For 2D symplectic maps the differentiation between regular and chaotic regions is well full-filled. For 4D symplectic maps the structure of the resonance web as well as the nearby weakly chaotic regions are accurately described.
description: International Journal of Bifurcation and Chaos, 2012
Nearest-neighbour directed random hyperbolic graphs
Creators: name: Kasyanov, I. A.
name: van der Hoorn, P.
name: Krioukov, D.
name: Tamm, M. V.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Social and Information Networks (cs.SI)
subject: Probability (math.PR)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: Undirected hyperbolic graph models have been extensively used as models of scale-free small-world networks with high clustering coefficient. Here we presented a simple directed hyperbolic model, where nodes randomly distributed on a hyperbolic disk are connected to a fixed number m of their nearest spatial neighbours. We introduce also a canonical version of this network (which we call "network with varied connection radius"), where maximal length of outgoing bond is space-dependent and is determined by fixing the average out-degree to m. We study local bond length, in-degree and reciprocity in these networks as a function of spatial coordinates of the nodes, and show that the network has a distinct core-periphery structure. We show that for small densities of nodes the overall in-degree has a truncated power law distribution. We demonstrate that reciprocity of the network can be regulated by adjusting an additional temperature-like parameter without changing other global properties of the network.
description: 26 papers, 12 figures
Dust-Corrected Star Formation Rates of Galaxies. II. Combinations of Ultraviolet and Infrared Tracers
Creators: name: Hao, Cai-Na
name: Kennicutt,, Robert C.
name: Johnson, Benjamin D.
name: Calzetti, Daniela
name: Dale, Daniel A.
name: Moustakas, John
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present new calibrations of far-ultraviolet (FUV) attenuation as derived from the total infrared to FUV luminosity ratio (IRX) and the FUV-NUV color. We find that the IRX-corrected FUV luminosities are tightly and linearly correlated with the attenuation-corrected Hα luminosities (as measured from the Balmer decrement), with a rms scatter of $\pm 0.09$ dex. The ratios of these attenuation-corrected FUV to Hα luminosities are consistent with evolutionary synthesis model predictions, assuming a constant star formation rate over 100 Myr, solar metallicity and either a Salpeter or a Kroupa IMF with lower and upper mass limits of 0.1 and 100\msun. The IRX-corrected FUV to Balmer-corrected Hα luminosity ratios do not show any trend with other galactic properties over the ranges covered by our sample objects. In contrast, FUV attenuation derived from the FUV-NUV color (UV spectral slope) show much larger random and systematic uncertainties. When compared to either Balmer-corrected Hα luminosities or IRX-corrected FUV luminosities the color-corrected FUV luminosities show $\sim 2.5$ times larger rms scatter, and systematic nonlinear deviations as functions of luminosity and other parameters. Linear combinations of 25um and 1.4GHz radio continuum luminosities with the observed FUV luminosities are also well correlated with the Balmer-corrected Hα luminosities. These results provide useful prescriptions for deriving attenuation-corrected star formation rates of galaxies based on linear combinations of UV and IR or radio luminosities, which are presented in convenient tabular form. Comparisons of our calibrations with attenuation corrections in the literature and with dust attenuation laws are also made.
description: 54 pages, 16 figures, accepted for publication in The Astrophysical Journal
title: Climate prediction S&T digest : NWS science & technology infusion climate bulletin supplement.
title: 39th NOAA Climate Diagnostics and Prediction Workshop special issue
titleType: AlternativeTitle
Creators: name: Climate Diagnostics And Prediction Workshop (39th : 2014 : St. Louis,  Mo.)
Publisher: name: U.S. Department of Commerce, National Oceanic and Atmospheric Administration, National Weather Service, Office of Science and Technology.
Year: 2015
Subjects: subject: Climatic changes--United States--Forecasting--Congresses.
subject: Numerical weather forecasting--United States--Congresses.

description: "NOAA's 39th Climate Diagnostics and Prediction Workshop was held in St. Louis, Missouri during 20-23 October 2014. The workshop addressed the status and prospects for advancing climate prediction, monitoring, and diagnostics, and focused on five major themes: 1. Prediction, monitoring, and variability of the hydroclimate with an emphasis on the Midwest during the growing season; 2. The prediction, attribution, and assessment of extreme events; 3. Sub-seasonal to interannual predictability; 4. Latest developments in models, tools, and techniques in relation to improving climate prediction; 5. Developing applications to improve climate services. The workshop was hosted by St. Louis University (SLU) and co-hosted by the Climate Prediction Center (CPC) of the National Centers for Environmental Prediction (NCEP). The American Meteorological Society (AMS) is a cooperating sponsor. The workshop featured daytime oral presentations, invited speakers and a poster session event. This Digest is a collection of extended summaries of the presentations contributed by participants. The workshop is continuing to grow and expected to provide a stimulus for further improvements in climate monitoring, diagnostics, prediction, applications and services.
Rheinische Münzschatzfunde aus Mittelalter und Neuzeit
Creators: name: Hagen, Joseph
Publisher: name: Bonner Jahrbücher
Year: 2020

description: Bonner Jahrbücher, Bd. 142 (1937): Bonner Jahrbücher des Vereins von Altertumsfreunden im Rheinlande und des Rheinischen Provinzialmuseums in Bonn
Effects of sulphur dioxide pollution on litter decomposition in a cool temperate pine forest
Creators: name: Prescott, Cindy Ellen, 1958-
Publisher: name: University of Calgary
Year: 1984
Subjects: subject: SD 390.3 A6 P72 1986
subject: Forest litter - Alberta - Biodegradation
subject: Plants, Effect of sulphur dioxide on
subject: Forest soils - Alberta

description: Bibliography: p. 100-120.
Kleinere Mitteilungen
Creators: name: Noll, Rudolf
name: Gaheis, Alexander
name: Hagen, Wilhelmine
Publisher: name: Bonner Jahrbücher
Year: 2020

description: Bonner Jahrbücher, Bd. 142 (1937): Bonner Jahrbücher des Vereins von Altertumsfreunden im Rheinlande und des Rheinischen Provinzialmuseums in Bonn
Time optimal quantum state transfer in a fully-connected quantum computer
Creators: name: Jameson, Casey
name: Basyildiz, Bora
name: Moore, Daniel
name: Clark, Kyle
name: Gong, Zhexuan
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The speed limit of quantum state transfer (QST) in a system of interacting particles is not only important for quantum information processing, but also directly linked to Lieb-Robinson-type bounds that are crucial for understanding various aspects of quantum many-body physics. For strongly long-range interacting systems such as a fully-connected quantum computer, such a speed limit is still unknown. Here we develop a new Quantum Brachistochrone method that can incorporate inequality constraints on the Hamiltonian. This method allows us to prove an exactly tight bound on the speed of QST on a subclass of Hamiltonians experimentally realizable by a fully-connected quantum computer.
description: 13 pages, 2 figures, accepted version
XMM-Newton Finds That SAX J1750.8-2900 May Harbor the Hottest, Most Luminous Known Neutron Star
Creators: name: Lowell, Alexander W.
name: Tomsick, John A.
name: Heinke, Craig O.
name: Bodaghee, Arash
name: Boggs, Steven E.
name: Kaaret, Philip
name: Chaty, Sylvain
name: Rodriguez, Jerome
name: Walter, Roland
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We have performed the first sensitive X-ray observation of the low-mass X-ray binary SAX J1750.8-2900 in quiescence with XMM-Newton. The spectrum was fit to both a classical black body model, and a non-magnetized, pure hydrogen neutron star atmosphere model. A power law component was added to these models, but we found that it was not required by the fits. The distance to SAX J1750.8-2900 is known to be D = 6.79 kpc from a previous analysis of photospheric radius expansion bursts. This distance implies a bolometric luminosity (as given by the NS atmosphere model) of (1.05 +/- 0.12) x 10^34 (D/6.79 kpc)^2 erg s^-1, which is the highest known luminosity for a NS LMXB in quiescence. One simple explanation for this surprising result could be that the crust and core of the NS were not in thermal equilibrium during the observation. We argue that this was likely not the case, and that the core temperature of the NS in SAX J1750.8-2900 is unusually high.
Willi Wegewitz, Die langobardische Kultur im Gau Moswidi (Niederelbe) zu Beginn unserer Zeitrechnung
Creators: name: Tackenberg, K.
Publisher: name: Bonner Jahrbücher
Year: 2020

description: Rezension zu: Willi Wegewitz, Die langobardische Kultur im Gau Moswidi (Niederelbe) zu Beginn unserer Zeitrechnung. Hildesheim (A. Lax) 1937. 4°. X und 181 Seitenmit 70 Abbildungen im Text und 33 Tafeln
description: Bonner Jahrbücher, Bd. 142 (1937): Bonner Jahrbücher des Vereins von Altertumsfreunden im Rheinlande und des Rheinischen Provinzialmuseums in Bonn
A simple solvable energy landscape model that shows a thermodynamic phase transition and a glass transition
Creators: name: Naumis, Gerardo G.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: When a liquid melt is cooled, a glass or phase transition can be obtained depending on the cooling rate. Yet, this behavior has not been clearly captured in energy landscape models. Here a model is provided in which two key ingredients are considered based in the landscape, metastable states and their multiplicity. Metastable states are considered as in two level system models. However, their multiplicity and topology allows a phase transition in the thermodynamic limit, while a transition to the glass is obtained for fast cooling. By solving the corresponding master equation, the minimal speed of cooling required to produce the glass is obtained as a function of the distribution of metastable and stable states. This allows to understand cooling trends due to rigidity considerations in chalcogenide glasses.
description: 4 pages (letter), 2 figures
Recovering Zipf's law in intercontinental scientific collaboration
Creators: name: Krawczyk, Malgorzata J.
name: Malarz, Krzysztof
Publisher: name: arXiv
Year: 2023
Subjects: subject: Digital Libraries (cs.DL)
subject: FOS: Computer and information sciences

description: Scientific cooperation on an international level has been well studied in the literature. However, much less is known about this cooperation on the intercontinental level. In this paper, we address this issue by creating a collection of approximately 13.8 million publications around the papers by one of the highly cited author working in complex networks and their applications. The obtained rank-frequency distribution of the probability of sequences describing continents and number of countries -- with which authors of papers are affiliated -- follows the power law with an exponent $-1.9108(15)$. Such a dependence is known in the literature as Zipf's law and it has been originally observed in linguistics, later it turned out that it is very commonly observed in various fields. The number of distinct ``continent (number of countries)'' sequences in a function of the number of analyzed papers grows according to power law with exponent $0.527(14)$, i.e. it follows Heap's law.
description: 6 pages, 3 figures, 4 tables
Public policy and rural poverty in Mexico
Creators: name: Poulton, David W. (David William), 1958-
Publisher: name: University of Calgary
Year: 1984
Subjects: subject: HC 135 P68 1987
subject: Mexico - Economic policy
subject: Rural poor - Mexico

description: Bibliography: p. 206-219.
description: This work deals with the relationship between the public rural policy process Mexico. It is economic and the persistence of poverty in assumed that the peasants have extraordinary interests based on the need to minimize risk. The hypothesis investigated is that any policy that does not recognize this special interest will neither be successful in gaining the co-operation of the peasants nor in bringing greater prosperity to the countryside. This hypothesis is tested by an examination of public policy in two eras of modern Mexican politics. In the period from 1940 to 1970 the Mexican government encouraged industrialization and the growth of capital-intensive agriculture. From 1970 to 1982 greater emphasis was placed on serving the lower classes more directly. In neither period, however, did the government's programmes gain the active co-operation of the peasants. In conclusion it is suggested that the centralized nature of decision-making in the Mexican public policy process may concentrate power in the hands of those who are unable to understand the problems of the rural poor and who, therefore, are unprepared to respond appropriately.
Coupling of hard dimers to dynamical lattices via random tensors
Creators: name: Bonzom, Valentin
name: Erbin, Harold
Publisher: name: arXiv
Year: 2012
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study hard dimers on dynamical lattices in arbitrary dimensions using a random tensor model. The set of lattices corresponds to triangulations of the d-sphere and is selected by the large N limit. For small enough dimer activities, the critical behavior of the continuum limit is the one of pure random lattices. We find a negative critical activity where the universality class is changed as dimers become critical, in a very similar way hard dimers exhibit a Yang-Lee singularity on planar dynamical graphs. Critical exponents are calculated exactly. An alternative description as a system of `color-sensitive hard-core dimers' on random branched polymers is provided.
description: 12 pages
Hadronic vacuum polarization correction to the bound-electron $g$ factor
Creators: name: Dizer, Eugen
name: Harman, Zoltán
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Atomic Physics (physics.atom-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The hadronic vacuum polarization correction to the $g$ factor of a bound electron is investigated theoretically. An effective hadronic Uehling potential obtained from measured cross sections of $e^- e^+$ annihilation into hadrons is employed to calculate $g$ factor corrections for low-lying hydrogenic levels. Analytical Dirac-Coulomb wave functions, as well as bound wave functions accounting for the finite nuclear radius are used. Closed formulas for the $g$ factor shift in case of a point-like nucleus are derived. In heavy ions, such effects are found to be much larger than for the free-electron $g$ factor.
Human-caused injury and mortality of NMFS-managed Alaska marine mammal stocks, 2010-2014.
Creators: name: Helker, V. T.
name: Muto, M. (Marcia)
name: Jemison, Lauri A.
Publisher: name: U.S. Department of Commerce, National Oceanic and Atmospheric Administration, National Marine Fisheries Service, Alaska Fisheries Science Center.
Year: 2016
Subjects: subject: Marine mammal populations--Alaska--Management.
subject: Marine mammals--Wounds and injuries--Effect of human beings on--Alaska.
subject: Marine mammals--Mortality--Effect of human beings on--Alaska.

description: Section 117 of the Marine Mammal Protection Act (MMPA) requires the National Marine Fisheries Service (NMFS) to estimate human-caused marine mammal mortality and serious injury. Data from documented interactions between human activities and pinnipeds or cetaceans belonging to stocks which appear in the Alaska Marine Mammal Stock Assessment Reports (SARs) were compiled for the 5-year period from 2010 through 2014. A total of 818 unique interactions with potential evidence of human-caused mortality or injury were reviewed and are summarized in this report. Details regarding each interaction were assessed for evidence of human-caused injury to the marine mammal and injury severity determinations were made for those injuries likely to be human-caused. Records of mortality are also included in this report, and assigned to source. Injury determination details regarding the injury source, type, severity, and criteria supporting the determination are presented in the appendices. Mortality and injury values were assigned to each interaction for comparison with the potential biological removal (PBR) levels for each stock calculated under the MMPA and appearing within the Alaska SARs.
The Feasibility of a single-entry intake unit for Alberta Social Services and Community Health
Creators: name: Radian, Elizabeth, 1945-
Publisher: name: University of Calgary
Year: 1984
Subjects: subject: HV 109 A54 R36 1986
subject: Alberta. Dept. of Social Services and Community Health
subject: Social service - Alberta
subject: Social service administration - Alberta

description: Bibliography: p. 114-117.
Eliminating Thermal IR Background Noise by Imaging with Undetected Photons
Creators: name: Ma, Yue
name: Gemmell, Nathan
name: Pearce, Emma
name: Oulton, Rupert
name: Phillips, Chris
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantum Physics (quant-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Spectroscopy and imaging in the mid-infrared (2.5 $μ$m $\sim$ $λ$ $\sim$ 25 $μ$m) is bedevilled by the presence of a strong 300 K thermal background at room temperature that makes IR detectors decades noisier than can be readily achieved in the visible. The technique of "imaging with undetected photons" (IUP) exploits the quantum correlations between entangled photon pairs to transfer image information from one spectral region to another, and here we show that it does so in a way that is immune to the thermal background. This means that IUP can be used to perform high speed photon counting measurements across the mid-IR, using uncooled visible detectors that are many times cheaper, faster, and more sensitive than their IR counterparts.
description: 6 pages, 3 figures
Reexamination of the Infrared Excess-Ultraviolet Slope Relation of Local Galaxies
Creators: name: Takeuchi, Tsutomu T.
name: Yuan, Fang-Ting
name: Ikeyama, Akira
name: Murata, Katsuhiro L.
name: Inoue, Akio K.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The relation between the ratio of infrared (IR) and ultraviolet (UV) flux densities (the infrared excess: IRX) and the slope of the UV spectrum (β) of galaxies plays a fundamental role in the evaluation of the dust attenuation of star forming galaxies especially at high redshifts. Many authors, however, pointed out that there is a significant dispersion and/or deviation from the originally proposed IRX-βrelation depending on sample selection. We reexamined the IRX-βrelation by measuring the far- and near-UV flux densities of the original sample galaxies with GALEX and AKARI imaging data, and constructed a revised formula. We found that the newly obtained IRX values were lower than the original relation because of the significant underestimation of the UV flux densities of the galaxies, caused by the small aperture of IUE, Further, since the original relation was based on IRAS data which covered a wavelength range of λ= 42--122\mum, using the data from AKARI which has wider wavelength coverage toward longer wavelengths, we obtained an appropriate IRX-βrelation with total dust emission (TIR): \log(L_{\rm TIR}/L_{\rm FUV}) = \log [10^{0.4(3.06+1.58β)}-1] +0.22. This new relation is consistent with most of the preceding results for samples selected at optical and UV, though there is a significant scatter around it. We also found that even the quiescent class of IR galaxies follows this new relation, though luminous and ultraluminous IR galaxies distribute completely differently as well known before.
description: 24 pages, 15 figures, ApJ, in press