cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Coboson formalism for Cooper pairs used to derive Richardson's equations
Creators: name: Combescot, Monique
name: Zhu, Guojun
Publisher: name: arXiv
Year: 2010
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We propose a many-body formalism for Cooper pairs which has similarities to the one we recently developed for composite boson excitons (coboson in short). Its Shiva diagram representation evidences that $N$ Cooper pairs differ from $N$ single pairs through electron exchange only: no direct coupling exists due to the very peculiar form of the BCS potential. As a first application, we here use this formalism to derive Richardson's equations for the exact eigenstates of $N$ Cooper pairs. This gives hints on why the $N(N-1)$ dependence of the $N$-pair ground state energy we recently obtained by solving Richardson's equations analytically in the low density limit, stays valid up to the dense regime, no higher order dependence exists even under large overlap, a surprising result hard to accept at first. We also briefly question the BCS wave function ansatz compared to Richardson's exact form, in the light of our understanding of coboson many-body effects.
Regularity versus complexity in the binary representation of 3^n
Creators: name: Rowland, Eric S.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11A63; 11D88

description: We use the grid consisting of bits of 3^n to motivate the definition of 2-adic numbers. Specifically, we exhibit diagonal stripes in the bits of 3^(2^n), which turn out to be the first in an infinite sequence of such structures. Our observations are explained by a 2-adic power series, providing some regularity among the disorder in the bits of powers of 3. Generally, the base-p representation of k^(p^n) has these features.
description: 10 pages, 7 figures; published version
Flash photolysis of NO2 and SO2.
Creators: name: Morse, Robert Donald
Publisher: name: University of British Columbia
Year: 2011

description: Vibrationally excited oxygen with up to 15 quanta of energy has been produced in the flash photolysis of NO₂ . When the NO₂ was selectively photolysed such that only radiation below 4000 A° was admitted to the reaction vessel the highest level observed was reduced to v" = 11 which in terms of vibrational energy corresponds to the exothermicity of the reaction O + NO₂ —> NO + O₂ Relative population ratios for the successive vibrational levels v" = 6 to 11 were calculated for both the filtered and unfiltered photolysis of NO₂ using two independently calculated arrays of Franck-Condon Factors. In both cases the ratios showed that the population distribution was definitely non Boltzmann. in that the levels were almost equally populated. The distribution for the unfiltered experiments gave a pronounced dip at v" =11 indicating that the levels 12 ≤ v" ≤ 15 are formed by a second reaction. This reaction has been shown to be Q+ NO*₂—> O*₂ v" ≥12 +NO where the NO₂ is probably electronically excited. The adiabatic flash photolysis of both NO₂ and SO₂ has been investigated. These spectra show weakening of their banded structure up to 100 microseconds after the flash and then gradual strengthening until back to normal by 10 milliseconds. This effect is well known for SO₂ and has been postulated to be the result of the formation of a high temperature isomer of SO₂. Subsequently the postulated isomer had a transient spectrum in the vacuum ultraviolet assigned to it. We have found that the weakening of both the NO₂ and SO₂ banded structure is the result of temperature broadening. The spectrum assigned to the SO₂ isomer has been extended. It has also been produced from the flash photolysis of SO₂ under isothermal conditions showing that its assignment to a high temperature isomer is incorrect. From kinetic data this spectrum in the 1800 A° region and another the 1400 A° region has been tentatively identified as two triplet systems of SO.
Toward a magnetohydrodynamic theory of the stationary accretion shock: toy model of the advective-acoustic cycle in a magnetized flow
Creators: name: Guilet, Jerome
name: Foglizzo, Thierry
Publisher: name: arXiv
Year: 2009
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The effect of a magnetic field on the linear phase of the advective-acoustic instability is investigated, as a first step toward a magnetohydrodynamic (MHD) theory of the stationary accretion shock instability taking place during stellar core collapse. We study a toy model where the flow behind a planar stationary accretion shock is adiabatically decelerated by an external potential. Two magnetic field geometries are considered: parallel or perpendicular to the shock. The entropy-vorticity wave, which is simply advected in the unmagnetized limit, separates into five different waves: the entropy perturbations are advected, while the vorticity can propagate along the field lines through two Alfven waves and two slow magnetosonic waves. The two cycles existing in the unmagnetized limit, advective-acoustic and purely acoustic, are replaced by up to six distinct MHD cycles. The phase differences among the cycles play an important role in determining the total cycle efficiency and hence the growth rate. Oscillations in the growth rate as a function of the magnetic field strength are due to this varying phase shift. A vertical magnetic field hardly affects the cycle efficiency in the regime of super-Alfvenic accretion that is considered. In contrast, we find that a horizontal magnetic field strongly increases the efficiencies of the vorticity cycles that bend the field lines, resulting in a significant increase of the growth rate if the different cycles are in phase. These magnetic effects are significant for large-scale modes if the Alfven velocity is a sizable fraction of the flow velocity.
description: 13 pages, 9 figures, accepted for publication in ApJ. Cosmetic changes after proof reading corrections.
Corotational Instability of Inertial-Acoustic Modes in Black Hole Accretion Discs and Quasi-Periodic Oscillations
Creators: name: Lai, Dong
name: Tsang, David
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We study the global stability of non-axisymmetric p-modes (also called inertial-acoustic modes) trapped in the inner-most regions of accretion discs around black holes. We show that the lowest-order (highest-frequency) p-modes, with frequencies $ω=(0.5-0.7) mΩ_{\rm ISCO}$, can be overstable due to general relativistic effects, according to which the radial epicyclic frequency is a non-monotonic function of radius near the black hole. The mode is trapped inside the corotation resonance radius and carries a negative energy. The mode growth arises primarily from wave absorption at the corotation resonance, and the sign of the wave absorption depends on the gradient of the disc vortensity. When the mode frequency is sufficiently high, such that the slope of the vortensity is positive at corotation positive wave energy is absorbed at the resonance, leading to the growth of mode amplitude. We also study how the rapid radial inflow at the inner edge of the disc affects the mode trapping and growth. Our analysis of the behavior of the fluid perturbations in the transonic flow near the ISCO indicates that, while the inflow tends to damp the mode, the damping effect is sufficiently small under some conditions so that net mode growth can still be achieved. We further clarify the role of the Rossby wave instability and show that it does not operate for black hole accretion discs with smooth-varying vortensity profiles. Overstable non-axisymmetric p-modes driven by the corotational instability provide a plausible explanation for the high-frequency (> 100 Hz) quasi-periodic oscillations (HFQPOs) observed from a number of black-hole X-ray binaries in the very high state. The absence of HFQPOs in the soft (thermal) state may result from mode damping due to the radial infall at the ISCO.
description: 19 pages, 11 figures, MNRAS in press
PCI Circuit Neuroscience poster with audio FENS2020
Creators: name: Mercier, Marion
name: Karnani, Mahesh
name: Magloire, Vincent
Publisher: name: Zenodo
Year: 2020
Subjects: preprint peer-review platform community review scholarly communication

description: PCI Circuit Neuroscience poster with audio FENS2020
description: Check out the 3-min audio explanation in ppt!
Algebraic Density Functionals
Creators: name: Giraud, B. G.
name: Karataglidis, S.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: A systematic strategy for the calculation of density functionals (DFs) consists in coding informations about the density and the energy into polynomials of the degrees of freedom of wave functions. DFs and Kohn-Sham potentials (KSPs) are then obtained by standard elimination procedures of such degrees of freedom between the polynomials. Numerical examples illustrate the formalism.
description: 7 pages, 2 figures, changes to extend discussion of Kohn-Sham potentials, and also for interacting particles. Accepted for publication in Physics Letters B
How Match Duration Affects Victory in Dota 2 and CS2
Creators: name: Hawk.live LLC
Publisher: name: Zenodo
Year: 2025
Subjects: subject: esport
subject: Video games
subject: Video Games
subject: Dota 2
subject: CS2

description: Esports matches in Dota 2 and Counter-Strike 2 (CS2) often vary in length, which cansignificantly affect team performance and final outcomes. Studies indicate thatmatch duration is directly linked to player concentration, physical and mental strain,as well as the tactical decisions made during the game.Source: Hawk.live
Stability and chaos in coupled two-dimensional maps on Gene Regulatory Network of bacterium E.Coli
Creators: name: Levnajić, Zoran
name: Tadić, Bosiljka
Publisher: name: arXiv
Year: 2010
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: Biological Physics (physics.bio-ph)
subject: Molecular Networks (q-bio.MN)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: The collective dynamics of coupled two-dimensional chaotic maps on complex networks is known to exhibit a rich variety of emergent properties which crucially depend on the underlying network topology. We investigate the collective motion of Chirikov standard maps interacting with time delay through directed links of Gene Regulatory Network of bacterium Escherichia Coli. Departures from strongly chaotic behavior of the isolated maps are studied in relation to different coupling forms and strengths. At smaller coupling intensities the network induces stable and coherent emergent dynamics. The unstable behavior appearing with increase of coupling strength remains confined within a connected sub-network. For the appropriate coupling, network exhibits statistically robust self-organized dynamics in a weakly chaotic regime.
Solvated electron yield in the radiolysis of formamide
Creators: name: Head, David Alan
Publisher: name: University of British Columbia
Year: 2011

description: Some of the thermal electrons formed when a liquid is subjected to high-energy radiations eventually become solvated. These solvated electrons (e⁻solv) are of special chemical interest due to their powerful reducing nature. The mechanism by which solvation occurs is not well understood, but must depend upon several solvent properties, of which the static dielectric constant is probably the most important. Some insight into the factors determining electron solvation may be gained through a knowledge of the radiation yields of e⁻solv in a wide variety of liquids. Since water is the liquid of highest dielectric constant (є=80) studied to date it seemed worthwhile to extend our knowledge beyond this point. Of the four common liquids with dielectric constants greater than that of water, formamide (є=109) was best suited for this study. In the present work the e⁻solv yield in formamide was found to be only slightly greater than its yield in water, which is surprising considering the large increase in dielectric constant. A modified correlation which, in addition to the dielectric constant, included the solvating ability and the stopping power of the solvent was shown to give a better fit to data for a number of liquids (resolving, for instance, the ammonia anomaly), indicating that these factors also govern the yield of e⁻solv. The yields of hydrogen, carbon monoxide, and nitrogen formed when formamide and its nitrous oxide solutions were irradiated with ⁶⁰Co Ƴ-rays gave information concerning the e⁻solv yield. Using the electron scavenger N₂O and the scavenger pairs N₂O/Cd⁺⁺, N₂O/Ag⁺, and N₂O/acid, the number of e⁻solv formed per 100 eV of energy absorbed was found to be 2.9±0.1. This yield corresponds fairly closely with the value which can be calculated using Freeman's non-homogeneous model. The primary yields of H₂ HCONH*₂, CO, and HCO were evaluated as .75±0.05, 0.4±0.1, ≤ 0.55±0.07, and ≥ 1.15±0.20 molecules/l00eV respectively. At low doses (up to ∼5xl0¹⁹ eV/ml) the yields of H₂, N₂, and CO were dose independent for the dose rate of ∼4xl0¹⁷ eV/ml-minute used. In two types of pulse radiolysis experiments light absorption was not observed in the 4500 Å to 8500 Å wavelength region contrary to expectations. A comparison of these results with those from other work may be interpreted as suggesting that the half-life of formation of e⁻solv, in formamide is between 0.36 and 1.9 microseconds. This tentative conclusion, if correct, would mean that e⁻solv was a secondary, not a primary, product in formamide and this would be of general significance to the primary processes of radiation chemistry.
Associative polynomial functions over bounded distributive lattices
Creators: name: Couceiro, Miguel
name: Marichal, Jean-Luc
Publisher: name: arXiv
Year: 2009
Subjects: subject: Rings and Algebras (math.RA)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 28B15, 39B72 (Primary) 06D05 (Secondary)

description: The associativity property, usually defined for binary functions, can be generalized to functions of a given fixed arity n>=1 as well as to functions of multiple arities. In this paper, we investigate these two generalizations in the case of polynomial functions over bounded distributive lattices and present explicit descriptions of the corresponding associative functions. We also show that, in this case, both generalizations of associativity are essentially the same.
description: Final version
The nuclear star cluster of the Milky Way
Creators: name: Schoedel, R.
name: Merritt, D.
name: Eckart, A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The nuclear star cluster of the Milky Way is a unique target in the Universe. Contrary to extragalactic nuclear star clusters, using current technology it can be resolved into tens of thousands of individual stars. This allows us to study in detail its spatial and velocity structure as well as the different stellar populations that make up the cluster. Moreover, the Milky Way is one of the very few cases where we have firm evidence for the co-existence of a nuclear star cluster with a central supermassive black hole, Sagittarius A*. The number density of stars in the Galactic center nuclear star cluster can be well described, at distances $\gtrsim1$ pc from Sagittarius A*, by a power-law of the form $ρ(r)\propto r^{-γ}$ with an index of $γ\approx1.8$. In the central parsec the index of the power-law becomes much flatter and decreases to $γ\approx1.2$. We present proper motions for more than 6000 stars within 1 pc in projection from the central black hole. The cluster appears isotropic at projected distances $\gtrsim0.5$ pc from Sagittarius A*. Outside of 0.5 pc and out to 1.0 pc the velocity dispersion appears to stay constant. A robust result of our Jeans modeling of the data is the required presence of $0.5-2.0\times10^{6} M_{\odot}$ of extended (stellar) mass in the central parsec of the Galaxy.
description: To appear in the proceedings of "The Universe under the Microscope - Astrophysics at High Angular Resolution", Journal of Physics:Conference Series (IOP; http://www.iop.org/EJ/conf) This version has been slightly modified (e.g. double-log plot in right hand panel of Figure 5)
Limit laws of transient excited random walks on integers
Creators: name: Kosygina, Elena
name: Mountford, Thomas
Publisher: name: arXiv
Year: 2009
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 60K37, 60F05, 60J80 (Primary), 60J60 (Secondary)

description: We consider excited random walks (ERWs) on integers with a bounded number of i.i.d. cookies per site without the non-negativity assumption on the drifts induced by the cookies. Kosygina and Zerner [KZ08] have shown that when the total expected drift per site, delta, is larger than 1 then ERW is transient to the right and, moreover, for delta>4 under the averaged measure it obeys the Central Limit Theorem. We show that when delta in (2,4] the limiting behavior of an appropriately centered and scaled excited random walk under the averaged measure is described by a strictly stable law with parameter delta/2. Our method also extends the results obtained by Basdevant and Singh [BS08b] for delta in (1,2] under the non-negativity assumption to the setting which allows both positive and negative cookies.
description: 27 pages
Dark matter response to galaxy formation
Creators: name: Tissera, Patricia B.
name: White, Simon D. M.
name: Pedrosa, Susana
name: Scannapieco, Cecilia
Publisher: name: arXiv
Year: 2009
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We have resimulated the six galaxy-sized haloes of the Aquarius Project including metal-dependent cooling, star formation and supernova feedback. This allows us to study not only how dark matter haloes respond to galaxy formation, but also how this response is affected by details of halo assembly history. In agreement with previous work, we find baryon condensation to lead to increased dark matter concentration. Dark matter density profiles differ substantially in shape from halo to halo when baryons are included, but in all cases the velocity dispersion decreases monotonically with radius. Some haloes show an approximately constant dark matter velocity anisotropy with $ β\approx 0.1-02$, while others retain the anisotropy structure of their baryon-free versions. Most of our haloes become approximately oblate in their inner regions, although a few retain the shape of their dissipationless counterparts. Pseudo-phase-space densities are described by a power law in radius of altered slope when baryons are included. The shape and concentration of the dark matter density profiles are not well reproduced by published adiabatic contraction models. The significant spread we find in the density and kinematic structure of our haloes appears related to differences in their formation histories. Such differences already affect the final structure in baryon-free simulations, but they are reinforced by the inclusion of baryons, and new features are produced. The details of galaxy formation need to be better understood before the inner dark matter structure of galaxies can be used to constrain cosmological models or the nature of dark matter.
description: 14 pages, 9 figures. Accepted MNRAS. Revised version includes discussion on resolution effects and minor changes.
Kolmogorov analysis detecting radio and Fermi gamma-ray sources in cosmic microwave background maps
Creators: name: Gurzadyan, V. G.
name: Kashin, A. L.
name: Khachatryan, H. G.
name: Kocharyan, A. A.
name: Poghosian, E.
name: Vetrugno, D.
name: Yegorian, G.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The Kolmogorov stochasticity parameter is shown to act as a tool to detect point sources in the cosmic microwave background (CMB) radiation temperature maps. Kolmogorov CMB map constructed for the WMAP's 7-year datasets reveals tiny structures which in part coincide with point radio and Fermi/LAT gamma-ray sources. In the first application of this method, we identified several sources not present in the then available 0FGL Fermi catalog. Subsequently they were confirmed in the more recent and more complete 1FGL catalog, thus strengthening the evidence for the power of this methodology.
description: 4 pages, 3 figs, 1 Table; to match the published version
DISEÑO DE UN SISTEMA DE GESTIÓN DEL CONOCIMIENTO PARA EL SISTEMA DE BIBLIOTECAS DE LA UNIVERSIDAD DE LOS ANDES
Creators: name: Viracachá, Marisol
Publisher: name: figshare
Year: 2022
Subjects: subject: Library and Information Studies
subject: FOS: Media and communications

description: El proyecto Diseño de un sistema de gestión del conocimiento para el Sistema de Bibliotecas de la Universidad de los Andes, nace de la necesidad de tener no sólo identificado y almacenado el conocimiento crítico que posee la organización, sino que a su vez se pueda acceder a el de una manera fácil y rápida. Para realizar el proyecto se siguió el modelo ADDIE (Análisis, Diseño, Desarrollo, Implementación y Evaluación). Entre los procesos que se diseñaron para llevar a cabo el proyecto tenemos: identificación de los activos del Sistema de Bibliotecas, para lo cual se aplicó el Modelo Intelect, luego se plantea la elaboración de un inventario de conocimientos, después se toma como base el modelo de gestión de conocimiento Nonaka y Takeuchi y se estructura acorde al Sistema de Bibliotecas, para facilitar la transformación del conocimiento tácito al conocimiento explícito, por último se propone el diseño de la Intranet que ayudará al intercambio del conocimiento dentro de la organización. El proyecto tiene como finalidad aprovechar el activo intangible que tiene el Sistema de Bibliotecas en el conocimiento de sus funcionarios, con el fin de lograr la calidad en todos sus procedimientos, los cuales van a ser realizados por funcionarios cada vez más comprometidos y motivados, con un sistema que les permite resaltar las mejores prácticas y aprender de los errores cometidos de una manera constante. Pero se recomienda que el proyecto cuente con reuniones constantes, en las cuales se explique su objetivo y a su vez se motive a todo el personal; también es importante tener en cuenta, que los conocimientos deben ser actualizados periódicamente, con el fin de que la organización cuente siempre con el conocimiento crítico para la realización de las diferentes actividades laborales; la puesta en marcha de estas recomendaciones asegurarán el éxito del proyecto.
The RN/CFT Correspondence
Creators: name: Garousi, Mohammad R.
name: Ghodsi, Ahmad
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Recently it has been shown in 0901.0931 [hep-th] that the approach to extremality for the non-extremal Reissner-Nordstrom black hole is not continuous. The non-extremal RN black hole splits into two spacetimes at the extremality: an extremal black hole and a disconnected $AdS_2\times S^2$ space which has been called the "compactification solution". As a possible resolution for understanding the entropy of extremal RN black hole, it has been speculated that the entropy of the non-extremal black hole may be carried by the latter solution. By uplifting the four dimensional "compactification solution" with electric charge $Q_e$ to a five dimensional solution, we show that this solution is dual to a CFT with central charge $c=6Q_e^3$. The Cardy formula then shows that the microscopic entropy of the CFT is the same as the macroscopic entropy of the "compactification solution".
description: 14 pages, latex; Version published in PLB.
Universal Properties of Cuprate Superconductors: Tc Phase Diagram, Room-Temperature Thermopower, Neutron Spin Resonance, and STM Incommensurability Explained in Terms of Chiral Plaquette Pairing
Creators: name: Tahir-Kheli, Jamil
name: Goddard, William A.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We report that four properties of cuprates and their evolution with doping are consequences of simply counting four-site plaquettes arising from doping: (1) the universal Tc phase diagram (superconductivity between \approx0.05 and \approx0.27 doping per CuO2 plane, and optimal Tc at \approx0.16), (2) the universal doping dependence of the room-temperature thermopower, (3) the superconducting neutron spin resonance peak (the "41 meV peak"), and (4) the dispersionless scanning tunneling conductance incommensurability. Properties (1), (3), and (4) are explained with no adjustable parameters, and (2) is explained with exactly one. The successful quantitative interpretation of four very distinct aspects of cuprate phenomenology by a simple counting rule provides strong evidence for four-site plaquette percolation in these materials. This suggests that inhomogeneity, percolation, and plaquettes play an essential role in cuprates. This geometric analysis may provide a useful guide to search for new compositions and structures with improved superconducting properties.
description: 12 pages (5 pages main text + 7 pages supplement). Replaced due to added STM theory. http://pubs.acs.org/doi/abs/10.1021/jz100265k
Galactic abundance gradients from Cepheids : On the iron abundance gradient around 10-12 kpc
Creators: name: Lemasle, B.
name: Francois, P.
name: Piersimoni, A.
name: Pedicelli, S.
name: Bono, G.
name: Laney, C. D.
name: Primas, F.
name: Romaniello, M.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Context: Classical Cepheids can be adopted to trace the chemical evolution of the Galactic disk since their distances can be estimated with very high accuracy. Aims: Homogeneous iron abundance measurements for 33 Galactic Cepheids located in the outer disk together with accurate distance determinations based on near-infrared photometry are adopted to constrain the Galactic iron gradient beyond 10 kpc. Methods: Iron abundances were determined using high resolution Cepheid spectra collected with three different observational instruments: ESPaDOnS@CFHT, Narval@TBL and FEROS@2.2m ESO/MPG telescope. Cepheid distances were estimated using near-infrared (J,H,K-band) period-luminosity relations and data from SAAO and the 2MASS catalog. Results: The least squares solution over the entire data set indicates that the iron gradient in the Galactic disk presents a slope of -0.052+/-0.003 dex/kpc in the 5-17 kpc range. However, the change of the iron abundance across the disk seems to be better described by a linear regime inside the solar circle and a flattening of the gradient toward the outer disk (beyond 10 kpc). In the latter region the iron gradient presents a shallower slope, i.e. -0.012+/-0.014 dex/kpc. In the outer disk (10-12 kpc) we also found that Cepheids present an increase in the spread in iron abundance. Current evidence indicates that the spread in metallicity depends on the Galactocentric longitude. Finally, current data do not support the hypothesis of a discontinuity in the iron gradient at Galactocentric distances of 10-12 kpc. Conclusions: The occurrence of a spread in iron abundance as a function of the Galactocentric longitude indicates that linear radial gradients should be cautiously treated to constrain the chemical evolution across the disk.
description: 5 tables, 8 figures, Accepted in A&A
A General Study of the Influence of Catastrophic Photometric Redshift Errors on Cosmology with Cosmic Shear Tomography
Creators: name: Hearin, Andrew P.
name: Zentner, Andrew R.
name: Ma, Zhaoming
name: Huterer, Dragan
Publisher: name: arXiv
Year: 2010
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: A goal of forthcoming imaging surveys is to use weak gravitational lensing shear measurements to constrain dark energy. We quantify the importance of uncalibrated photometric redshift outliers to the dark energy goals of forthcoming imaging surveys in a manner that does not assume any particular photometric redshift technique or template. In so doing, we provide an approximate blueprint for computing the influence of specific outlier populations on dark energy constraints. We find that outliers whose photo-z distributions are tightly localized about a significantly biased redshift must be controlled to a per-galaxy rate of ~ 2.4 and z_phot
description: 18 pages, 7 figures, references added, minor changes to address points made by referee, accepted for publication in ApJ
Additional file 1 of Carnosine quenches the reactive carbonyl acrolein in the central nervous system and attenuates autoimmune neuroinflammation
Creators: name: Spaas, Jan
name: Franssen, Wouter M. A.
name: Keytsman, Charly
name: Blancquaert, Laura
name: Vanmierlo, Tim
name: Bogie, Jeroen
name: Broux, Bieke
name: Hellings, Niels
name: van Horssen, Jack
name: Posa, Dheeraj Kumar
name: Hoetker, David
name: Baba, Shahid P.
name: Derave, Wim
name: Eijnde, Bert O.
Publisher: name: figshare
Year: 2021
Subjects: subject: Biophysics
subject: Biochemistry
subject: Molecular Biology
subject: Pharmacology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Immunology
subject: FOS: Clinical medicine
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences

description: Additional file 1: Table S1. Clinical details of human brain tissue.
Quantum entanglement in photosynthetic light harvesting complexes
Creators: name: Sarovar, Mohan
name: Ishizaki, Akihito
name: Fleming, Graham R.
name: Whaley, K. Birgitta
Publisher: name: arXiv
Year: 2009
Subjects: subject: Quantum Physics (quant-ph)
subject: Biological Physics (physics.bio-ph)
subject: FOS: Physical sciences

description: Light harvesting components of photosynthetic organisms are complex, coupled, many-body quantum systems, in which electronic coherence has recently been shown to survive for relatively long time scales despite the decohering effects of their environments. Within this context, we analyze entanglement in multi-chromophoric light harvesting complexes, and establish methods for quantification of entanglement by presenting necessary and sufficient conditions for entanglement and by deriving a measure of global entanglement. These methods are then applied to the Fenna-Matthews-Olson (FMO) protein to extract the initial state and temperature dependencies of entanglement. We show that while FMO in natural conditions largely contains bipartite entanglement between dimerized chromophores, a small amount of long-range and multipartite entanglement exists even at physiological temperatures. This constitutes the first rigorous quantification of entanglement in a biological system. Finally, we discuss the practical utilization of entanglement in densely packed molecular aggregates such as light harvesting complexes.
description: 14 pages, 7 figures. Improved presentation, published version
Geometric counter-vertex for open string scattering on D-branes
Creators: name: Park, I. Y.
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In arXiv:0801.0218 [hep-th] it was conjectured that quantum effects of open strings moving on D-branes generate the D-brane geometry through a counter-vertex operator. The conjecture has been checked at one-loop in arXiv:0806.3330 [hep-th]. Here we discuss the two-loop extension.
description: 37 pages, latex, typos corrected, various clarifications made, references added, version that will appear in EPJC
Phenomenology of AdS/QCD and Its Gravity Dual
Creators: name: Galow, B.
name: Megias, E.
name: Nian, J.
name: Pirner, H. J.
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We construct the dilaton potential in the gravity dual theory of AdS/QCD for the warp factor of Refs.{1,2}. Using this AdS_5-metric with properties similar to QCD, we find that the gravity dual leads to a meaningful gauge coupling in the region between the charmonium and bottonium mass, but differs slightly from QCD in the extreme UV. When we fix the ultraviolet behavior in accord with the beta-function, we can obtain good agreement with the overall heavy quark-antiquark potential. Although the leading order proportional to -α^{4/3}/r differs from perturbative QCD, the full potential agrees quite well with the short distance QCD potential in NNLO.
description: 42 pages, 13 figures, 1 table
Additional file 1 of CaCO3 powder-mediated biomineralization of antigen nanosponges synergize with PD-1 blockade to potentiate anti-tumor immunity
Creators: name: Su, Runping
name: Gu, Jingjing
name: Sun, Juanjuan
name: Zang, Jie
name: Zhao, Yuge
name: Zhang, Tingting
name: Chen, Yingna
name: Chong, Gaowei
name: Yin, Weimin
name: Zheng, Xiao
name: Liu, Bingbing
name: Huang, Li
name: Ruan, Shuangrong
name: Dong, Haiqing
name: Li, Yan
name: Li, Yongyong
Publisher: name: figshare
Year: 2023
Subjects: subject: Immunology
subject: FOS: Clinical medicine

description: Supplementary Material 1
On real analytic Banach manifolds
Creators: name: Patyi, Imre
name: Simon, Scott
Publisher: name: arXiv
Year: 2008
Subjects: subject: Complex Variables (math.CV)
subject: FOS: Mathematics
subject: 32C05;26E05, 32C35, 32V40, 46G20

description: Let $X$ be a real Banach space with an unconditional basis (e.g., $X=\ell_2$ Hilbert space), $Ω\subset X$ open, $M\subsetΩ$ a closed split real analytic Banach submanifold of $Ω$, $E\to M$ a real analytic Banach vector bundle, and ${\Cal A}^E\to M$ the sheaf of germs of real analytic sections of $E\to M$. We show that the sheaf cohomology groups $H^q(M,{\Cal A}^E)$ vanish for all $q\ge1$, and there is a real analytic retraction $r:U\to M$ from an open set $U$ with $M\subset U\subsetΩ$ such that $r(x)=x$ for all $x\in M$. Some applications are also given, e.g., we show that any infinite dimensional real analytic Hilbert submanifold of separable affine or projective Hilbert space is real analytically parallelizable.
Additional file 2 of Carnosine quenches the reactive carbonyl acrolein in the central nervous system and attenuates autoimmune neuroinflammation
Creators: name: Spaas, Jan
name: Franssen, Wouter M. A.
name: Keytsman, Charly
name: Blancquaert, Laura
name: Vanmierlo, Tim
name: Bogie, Jeroen
name: Broux, Bieke
name: Hellings, Niels
name: van Horssen, Jack
name: Posa, Dheeraj Kumar
name: Hoetker, David
name: Baba, Shahid P.
name: Derave, Wim
name: Eijnde, Bert O.
Publisher: name: figshare
Year: 2021
Subjects: subject: Biophysics
subject: Biochemistry
subject: Molecular Biology
subject: Pharmacology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Immunology
subject: FOS: Clinical medicine
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences

description: Additional file 2: Table S2. Oral carnosine treatment attenuates clinical disability in a monophasic rat EAE model.
Efficient estimation of nearly sparse many-body quantum Hamiltonians
Creators: name: Shabani, A.
name: Mohseni, M.
name: Lloyd, S.
name: Kosut, R. L.
name: Rabitz, H.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We develop an efficient and robust approach to Hamiltonian identification for multipartite quantum systems based on the method of compressed sensing. This work demonstrates that with only O(s log(d)) experimental configurations, consisting of random local preparations and measurements, one can estimate the Hamiltonian of a d-dimensional system, provided that the Hamiltonian is nearly s-sparse in a known basis. We numerically simulate the performance of this algorithm for three- and four-body interactions in spin-coupled quantum dots and atoms in optical lattices. Furthermore, we apply the algorithm to characterize Hamiltonian fine structure and unknown system-bath interactions.
description: 8 pages, 2 figures. Title is changed. Detailed error analysis is added. Figures are updated with additional clarifying discussions
A new approach to modified-gravity models
Creators: name: Chakrabarti, Sayan K.
name: Saridakis, Emmanuel N.
name: Sen, Anjan A.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We investigate f(R)-gravity models performing the ADM-slicing of standard General Relativity. We extract the static, spherically-symmetric vacuum solutions in the general case, which correspond to either Schwarzschild de-Sitter or Schwarzschild anti-de-Sitter ones. Additionally, we study the cosmological evolution of a homogeneous and isotropic universe, which is governed by an algebraic and not a differential equation. We show that the universe admits solutions corresponding to acceleration at late cosmological epochs, without the need of fine-tuning the model-parameters or the initial conditions.
description: 8 pages, 3 figures, version published in Gen.Rel.Grav
Additional file 3 of Carnosine quenches the reactive carbonyl acrolein in the central nervous system and attenuates autoimmune neuroinflammation
Creators: name: Spaas, Jan
name: Franssen, Wouter M. A.
name: Keytsman, Charly
name: Blancquaert, Laura
name: Vanmierlo, Tim
name: Bogie, Jeroen
name: Broux, Bieke
name: Hellings, Niels
name: van Horssen, Jack
name: Posa, Dheeraj Kumar
name: Hoetker, David
name: Baba, Shahid P.
name: Derave, Wim
name: Eijnde, Bert O.
Publisher: name: figshare
Year: 2021
Subjects: subject: Biophysics
subject: Biochemistry
subject: Molecular Biology
subject: Pharmacology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Immunology
subject: FOS: Clinical medicine
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences

description: Additional file 3: Table S3. Primer sequences.
Hawking-like radiation as tunneling from the apparent horizon in a FRW Universe
Creators: name: Zhu, Tao
name: Ren, Ji-Rong
name: Singleton, Douglas
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We study Hawking-like radiation in a Friedmann-Robertson-Walker (FRW) universe using the quasi-classical WKB/tunneling method which pictures this process as a "tunneling" of particles from behind the apparent horizon. The correct temperature of the Hawking-like radiation from the FRW spacetime is obtained using a canonical invariant tunneling amplitude. In contrast to the usual quantum mechanical WKB/tunneling problem where the tunneling amplitude has only a spatial contribution, we find that the tunneling amplitude for FRW spacetime (i.e. the imaginary part of the action) has both spatial and temporal contributions. In addition we study back reaction and energy conservation of the radiated particles and find that the tunneling probability and change in entropy, ${\cal S}$ are related by the relationship: $Γ\propto\exp[-Δ{\cal S}]$ which differs from the standard result $Γ\propto\exp[Δ{\cal S}]$. By regarding the whole FRW universe as an isolated adiabatic system the change in the total entropy is zero. Then splitting the entropy between interior and exterior parts of the horizon ($Δ{\cal S}_{total}=Δ{\cal S}_{int} + Δ{\cal S}_{ext}=0$), we can explain the origin of the minus sign difference with the usual result: our $Δ{\cal S}$ is for the interior region while the standard result from black hole physics is for the exterior region.
description: 13 pages, no figure;to appear in Int. J. Mod. Phys. D
The Linearity of the Cosmic Expansion Field from 300 to 30,000 km/s and the Bulk Motion of the Local Supercluster with Respect to the CMB
Creators: name: Sandage, A.
name: Reindl, B.
name: Tammann, G. A.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The meaning of "linear expansion" is explained. Particularly accurate relative distances are compiled and homogenized a) for 246 SNe Ia and 35 clusters with v<30,000 km/s, and b) for relatively nearby galaxies with 176 TRGB and 30 Cepheid distances. The 487 objects define a tight Hubble diagram from 300-30,000 km/s implying individual distance errors of <7.5%. Here the velocities are corrected for Virgocentric steaming (locally 220 km/s) and - if v_220>3500 km/s - for a 495 km/s motion of the Local Supercluster towards the warm CMB pole at l=275, b=12; local peculiar motions are averaged out by large numbers. A test for linear expansion shows that the corrected velocities increase with distance as predicted by a standard model with q_0=-0.55 [corresponding to (Omega_M, Omega_Lambda)=(0.3,0.7)], but the same holds - due to the distance limitation of the present sample - for a range of models with q_0 between ~0.00 and -1.00. For these models H_0 does not vary systematically by more than +/-2.3% over the entire range. Local, distance-dependent variations are equally limited to 2.3% on average. In particular the proposed Hubble Bubble of Zehavi et al. and Jha et al. is rejected at the 4sigma level. - Velocity residuals in function of the angle from the CMB pole yield a satisfactory apex velocity of 448+/-73 km/s and a coherence radius of the Local Supercluster of ~3500 km/s (~56 Mpc), beyond which galaxies are seen on average at rest in co-moving coordinates with respect to the CMB. Since no obvious single accelerator of the Local Supercluster exists in the direction of the CMB dipole its motion must be due to the integral gravitational force of all surrounding structures. Most of the gravitational dipole comes probably from within 5000 km/s.
description: 52 pages, 12 figures, 6 tables; accepted for publication in The Astrophysical Journal. v2: minor changes in both text and figures
Studies on total synthesis of veratrum alkaloids
Creators: name: Brookes, Roderick William
Publisher: name: University of British Columbia
Year: 2011

description: The initial work toward a synthetic entry into the hexacyclic cevane nucleus (7) is described, and the specific application of this work to the total synthesis of verticine (12) is discussed. Hecogenin acetate (74) was converted to C-nor-D-homo-(25 R)-5α-spirost-13(18)-en-3β-ol-3-acetate (79) via a known procedure, and hydroboration of the double bond gave the corresponding 13β-hydroxymethyl compound (80(a)). The mass spectral fragmentation of the spiroketal system is discussed. The stereochemistry at C-13 of the hydroborated compound (80(a)) was reversed by oxidation of the primary alcohol to the aldehyde, epimerization, and reduction. Acetylation gave the diacetate (85) which was used in investigation of the spiroketal side chain degradation. The Baeyer-Villiger oxidation sequence developed by W.F. Johns was used in the spiroketal degradation. 13α-Acetoxymethyl-17-acetyl-18-nor-5α-etiojerv-16(17)-en-3β-ol-3-acetate (110) was obtained with considerable difficulty in low yield from this sequence, A model compound, 17-acetyl-5α, 13β-etiojerv-16(17)-en-3β-ol (111), was employed to test the feasibility of attachment of a heterocyclic portion via a reaction developed by Schreiber and Adam. Reduction of the double bond and epimerization of the methyl ketone gave the ketone (120), which was then condensed with 2-lithio-5-methylpyridine. The structure of the condensation product was established by its n.m.r. and mass spectra.
Additional file 1 of Universal minicircle sequence binding protein of Leishmania donovani regulates pathogenicity by controlling expression of cytochrome-b
Creators: name: Singh, Ruby
name: Purkait, Bidyut
name: Abhishek, Kumar
name: Saini, Savita
name: Das, Sushmita
name: Verma, Sudha
name: Mandal, Abhishek
name: Ghosh, Ayan Kr.
name: Ansari, Yousuf
name: Kumar, Ashish
name: Sardar, Abul H.
name: Kumar, Ajay
name: Parrack, Pradeep
name: Das, Pradeep
Publisher: name: figshare
Year: 2022
Subjects: subject: Biochemistry
subject: 29999 Physical Sciences not elsewhere classified
subject: FOS: Physical sciences
subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Cell Biology
subject: Genetics
subject: Molecular Biology
subject: Immunology
subject: FOS: Clinical medicine
subject: Computational Biology

description: Additional file 1: Figure S1. 3D Model of LdUMSBP designed by Bio-informatics tools. Figure S2. Expression, Purification of recombinant LdUMSBP and Generation of anti-LdUMSBP Antibody. Figure S3. Immunolocalization of LdUMSBP in kDNA disk demonstrated by Phase and Fluorescence Microscopy. Figure S4. Redox potential controls oxidation-reduction status of UMSBP and its binding activity. Figure S5. PCR amplification of HYG and NEO gene from LdU−/− parasites, confirming the successful deletion of two allele of UMSBP by the Hygromycin and Neomycin cassette. Figure S6. Southern blot to demonstrate the deletion of two alleles of LdUMSBP from L. donovani genome. Figure S7. Phase contrast microphotograph after Geimsa staining of infected macrophages [infected with wild type (R), single knock out LdUMSBP (LdU−/+) and double knock out LdUMSBP (LdU−/−). Table S1. List of Primers. Table S2. Interacting amino acids of LdUMSBP with UMS sequence in docking study.
The importance of an accurate target wave function in variational calculations for (e^{+}-H_{2}) scattering
Creators: name: Cooper, J. N.
name: Armour, E. A. G.
name: Plummer, M.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Using the complex Kohn method, we have calculated variational values of phase shifts and the annihilation parameter, Z_{eff}, for the elastic scattering of positrons by molecular hydrogen. Our results are sensitive to small changes in the accuracy of the wave function representing the target hydrogen molecule. We have developed a systematic approach to demonstrate that, at low positron energies, there are particular forms of the Kohn trial wave function for which the results of variational calculations are not reliable, even when the target wave function accounts for as much as 96.8% of the correlation energy of H_{2}. We find that reliable results can be recovered if our calculations are extended to admit more sophisticated target wave functions accounting for 99.7% of the correlation energy. Remaining discrepancies between theory and experiment are briefly discussed.
description: Changed content in sections 3.1 and 4 to take referee's comments into account
Scattering of charge carriers in graphene induced by topological defects
Creators: name: Fonseca, J. M.
name: Moura-Melo, W. A.
name: Pereira, A. R.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Classical Physics (physics.class-ph)
subject: FOS: Physical sciences

description: We study the scattering of graphene quasiparticles by topological defects, represented by holes, pentagons and heptagons. For holes, we found that at low concentration they give a negligible contribution to the resistivity. Whenever pentagons or heptagons are introduced we realize that a fermionic current is scattered by defects.