cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
UV upturn versus UV weak galaxies: differences and similarities of their stellar populations unveiled by a de-biased sample
Creators: name: Dantas, M. L. L.
name: Coelho, P. R. T.
name: Sánchez-Blázquez, P.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The ultraviolet (UV) upturn is characterised by an unexpected up-rise of the UV flux in quiescent galaxies between the Lyman limit and 2500Å. By making use of colour-colour diagrams, one can subdivide UV bright red-sequence galaxies in two groups: UV weak and upturn. With these two groups, we propose a comparison between their stellar population properties with the goal of establishing differences and similarities between them. We make use of propensity score matching (PSM) to mitigate potential biases between the two samples, by selecting similar objects in terms of redshift and stellar mass. Also, we take advantage of spectral energy distribution (SED) fitting results from magphys made available by the GAMA collaboration. The analyses are made by comparing the distributions from the SED fitting directly, as well as investigating the differences in correlations between their parameters, and finally by using principal component analysis (PCA). We explore important differences and similarities between UV weak and upturn galaxies in terms of several parameters, such as: metallicity, age, specific star formation rate, time of last burst of star-formation, to mention a few. Notable differences are those concerning (g-r) colour, metallicity, and time since last burst of star-formation: UV upturn are redder in the optical, more metallic, and their last burst of star-formation happened earlier in time. These differences suggest that UV upturn systems have shorter star-formation histories (i.e. have been evolving more passively) when compared to UV weak galaxies. Consequently, these last seem to have a higher diversity of stellar populations.
description: 15 pages, 12 figures, 4 tables. Updated to match the accepted version
On the geometrical evolution of the ionized gas in HII galaxies
Creators: name: Cuisinier, F.
name: Westera, P.
name: Telles, E.
name: Buser, R.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: In this paper, we investigate the behaviour of the number of Lyman continuum ionizing photons as compared to the actual number of hydrogen recombinations in HII galaxies. We evaluate the number of ionizing photons from the population synthesis of spectra observed in the visible, extrapolating the spectra to the extreme ultraviolet (EUV), beyond the Lyman limit. We check for possible systematic deviations of the predicted ionizing spectra in the EUV by comparing the ratio of the predicted number of ionizing photons to the number of recombinations, as measured in H$β$, ${\rm Δ\log Q(H^0)}$, with the metallicity. We find that, as far as the number of ionizing photons is concerned, no systematic tendency can be detected. The ${\rm Hβ}$ equivalent width can be understood as a nebular age indicator, decreasing with age, although the observed ${\rm Hβ}$ equivalent width can also be affected by the contribution to the continuum by the accumulation of previous, non-ionizing stellar populations. We attribute the increase of ${\rm Δ\log Q(H^0)}$ with the age of the burst to the fact that more and more ionizing photons escape the nebulae when the nebulae get older, because of their increasing, expansion-induced subfragmentation.
description: 14 pages, accepted in A&A
Ricerca filosofica ed esperienza religiosa. Intervista ad Adriano Fabris
Creators: name: Petcu, Tudor Petcu
Publisher: name: Nuovo Giornale di Filosofia della Religione
Year: 2021

description: A.F. Filosofia e religione, considerate da un punto di vista antropologico, sono due possibilità dell’essere umano. Dovremmo parlare più precisamente di atteggiamento filosofico e di esperienza religiosa. L’atteggiamento filosofico è quello per cui chi fa filosofia prende le distanze dalle cose del mondo, dagli altri esseri umani, addirittura da se stesso, e si pone alcune domande, cercando di comprendere ciò che nelle cose, negli altri esseri umani, in lui stesso lo sorprende e lo coinvolge. Questo distacco assume varie forme. Può essere un’oggettivazione, può essere la semplice posizione di un tema. In ogni caso, attraverso le domande, e i tentativi di risposta che chi fa filosofia può dare, il filosofo si disloca rispetto al mondo, agli altri esseri umani, a se stesso. Si trova, più precisamente, in una condizione paradossale: è al tempo stesso fuori (grazie all’atteggiamento filosofico) e dentro (nella sua vita, di cui pure l’atteggiamento filosofico è parte) la relazione con le cose, con gli altri, con se stesso. Il problema della filosofia è dunque quello di capire questa relazione e motivare a metterla in opera bene.
description: Nuovo Giornale di Filosofia della Religione, N. 3 Luglio - Agosto 2017
Photonic spheres by microgel templating
Creators: name: Manne, Kalpana
name: Magkiriadou, Sofia
name: Yazhgur, Pavel
name: Demirörs, Ahmet
name: Scheffold, Frank
Publisher: name: Zenodo
Year: 2024
Subjects: Photonic spheres
templating
microgels
structural color
silica foams

description: We report on fabricating photonic spheres by combining submicron-sized microgelsand silica nanoparticles. By emulsifying the mixture and removing water through solvent drying,we achieve spheres of packed microgels measuring from a few micrometers to tens of micrometersin size. As the microgels de-swell, they exert pressure on the surrounding silica nanoparticles,forming a foam-like network within the droplet. The polymer microgels are then removed bycalcination, leaving behind a silica foam. These photonic spheres exhibit structural colors in thevisible spectral range, including challenging shades like red. The versatile approach we present here can pave the way for designing photonic pigments and be a step forward in understandinginverse structures with spherical morphology.
Relaxation in a glassy binary mixture: Mode-coupling-like power laws, dynamic heterogeneity and a new non-Gaussian parameter
Creators: name: Flenner, Elijah
name: Szamel, Grzegorz
Publisher: name: arXiv
Year: 2005
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We examine the relaxation of the Kob-Andersen Lennard-Jones binary mixture using Brownian dynamics computer simulations. We find that in accordance with mode-coupling theory the self-diffusion coefficient and the relaxation time show power-law dependence on temperature. However, different mode-coupling temperatures and power laws can be obtained from the simulation data depending on the range of temperatures chosen for the power-law fits. The temperature that is commonly reported as this system's mode-coupling transition temperature, in addition to being obtained from a power law fit, is a crossover temperature at which there is a change in the dynamics from the high temperature homogeneous, diffusive relaxation to a heterogeneous, hopping-like motion. The hopping-like motion is evident in the probability distributions of the logarithm of single-particle displacements: approaching the commonly reported mode-coupling temperature these distributions start exhibiting two peaks. Notably, the temperature at which the hopping-like motion appears for the smaller particles is slightly higher than that at which the hopping-like motion appears for the larger ones. We define and calculate a new non-Gaussian parameter whose maximum occurs approximately at the time at which the two peaks in the probability distribution of the logarithm of displacements are most evident.
description: Submitted for publication in Phys. Rev. E
Effective regulation of peptide hormones
Creators: name: Cao, Feihua
Publisher: name: The Australian National University
Year: 2012
Subjects: subject: QP572.P4 C36 2012
subject: Peptide hormones

description: In the work described in this thesis, peptidylglycine a-amidating monooxygenase (PAM) was extracted from human H889 and DMS53 small cell lung cancer (SCLC) cells, PC-3 prostate cancer cells and SW1783 glioblastoma cells. Optimization of PAM assay conditions was carried out to maximize PAM activity. The extracted enzymes and optimized assay conditions provided a platform to assess substrate and inhibitor kinetic parameters and to compare the enzyme specificities of PAM from different human cancer sources, as well as differences between human PAM and commercial frog PAM. Potent and selective PAM inhibitors were then developed on the basis of structure-activity-relationships as well as the recognition by PAM of the peptide chain of natural substrates. Furthermore, a direct, rapid, efficient and sensitive HPLC method was developed in order to carry out whole cell inhibition studies and to directly monitor the inhibitory effects on natural hormone and prohormone levels. This method includes online extraction, separation, derivatization and fluorescence detection of peptide hormones, and in principle could be used for any peptide hormone with a free primary amine for fluorescamine tagging. Calcitonin (CT) and its prohormones were studied due to their high expression in DMS53 cells. This is the first time that the levels of CT and its prohormones, CTG, CTGK and CTGKK, have been separated and quantified separately. The detection limits of the present HPLC method were determined to be around 1 ng/mL of cell medium. This method was then applied to whole cell inhibition studies, and this is the first time that inhibitors of CT biosynthesis in human cancer cells were studied, allowing the direct observation of the effects on CT levels and its prohormones. As CPE and PAM are involved in the specific cleavage of C-terminal basic amino acids and the last step of peptide bioactivation, respectively, CPE was also targeted to moderate CT levels. The newly developed whole cell PAM inhibition assay allowed direct determination of the effects of PAM and CPE inhibition on CT production.
Effect of coordination on topological phases on self-similar structures
Creators: name: Sarangi, Saswat
name: Nielsen, Anne E. B.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Topologically non-trivial phases have recently been reported on self-similar structures. Here, we investigate the effect of local structure, specifically the role of the coordination number, on the topological phases on self-similar structures embedded in two dimensions. We study a geometry dependent model on two self-similar structures having different coordination numbers, constructed from the Sierpinski Gasket. For different non-spatial symmetries present in the system, we numerically study and compare the phases on both the structures. We characterize these phases by the localization properties of the single-particle states, their robustness to disorder, and by using a real-space topological index. We find that both the structures host topologically non-trivial phases and the phase diagrams are different on the two structures. This suggests that, in order to extend the present classification scheme of topological phases to non-periodic structures, one should use a framework which explicitly takes the coordination of sites into account.
description: 9 pages, 12 figures
Ontologia, fenomenologia e nuovo umanesimo. Rosmini ri-generativo, a cura di Fernando Bellelli ed Emanuele Pili
Creators: name: Sessarego, Riccardo
Publisher: name: Nuovo Giornale di Filosofia della Religione
Year: 2021

description: Ontologia, fenomenologia e nuovo umanesimo. Rosmini ri-generativo curato da Fernando Bellelli ed Emanuele Pili non rappresenta semplicemente la pubblicazione degli atti del Convegno Rosmini per la nostra epoca. Elementi di ri-generazione tenutosi a Modena il 13 e il 14 novembre 2014, ma ha il pregio di mostrare al lettore l’attualità della riflessione filosofica rosminiana, offrendo al contempo uno spaccato sullo stato odierno della ricerca sul tema.
description: Nuovo Giornale di Filosofia della Religione, N. 4 Settembre - Ottobre 2017
Riflessioni sulla “Teologia frattale” di Alasdair MacIntyre, in cerca di valide verità
Creators: name: Marchesi, Angelo
Publisher: name: Nuovo Giornale di Filosofia della Religione
Year: 2021

description: Sulla Nouvelle Revue Théologique, Christophe Rouard ha presentato un lungo saggio che analizza il pensiero di A. MacIntyre: “en quête de vérité” (in cerca di verità), intitolato appunto: “In cerca di verità. Alasdair MacIntyre, ispiratore di una teologia frattale”.
description: Nuovo Giornale di Filosofia della Religione, N. 4 Settembre - Ottobre 2017
Spin Liquid Phase in Anisotropic Triangular Lattice Heisenberg Model: Exact diagonalization and density-matrix renormalization group calculations
Creators: name: Weng, M. Q.
name: Sheng, D. N.
name: Weng, Z. Y.
name: Bursill, Robert J.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Based on exact diagonalization and density matrix renormalization group (DMRG) method, we show that an anisotropic triangle lattice Heisenberg spin model has three distinct quantum phases. In particular, a spin-liquid phase is present in the weak interchain coupling regime, which is characterized by an exponentially-decaying spin correlator along the weaker coupling direction and a quasi-one-dimensional spin structure factor along the chain direction, in agreement with experiments on the Cs2CuCl4 compounds. In the obtained phase diagram, the spin liquid phase is found to persist up to a relatively large critical anisotropic coupling ratio J'/J=0.78, which is stabilized by strong quantum fluctuations, with a parity symmetry distinct from two magnetic ordered states in the stronger coupling regime.
description: 4 pages, 3 figures; revised version
All-electron periodic $G_0W_0$ implementation with numerical atomic orbital basis functions: algorithm and benchmarks
Creators: name: Ren, Xinguo
name: Merz, Florian
name: Jiang, Hong
name: Yao, Yi
name: Rampp, Markus
name: Lederer, Hermann
name: Blum, Volker
name: Scheffler, Matthias
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We present an all-electron, periodic {\GnWn} implementation within the numerical atomic orbital (NAO) basis framework. A localized variant of the resolution-of-the-identity (RI) approximation is employed to significantly reduce the computational cost of evaluating and storing the two-electron Coulomb repulsion integrals. We demonstrate that the error arising from localized RI approximation can be reduced to an insignificant level by enhancing the set of auxiliary basis functions, used to expand the products of two single-particle NAOs. An efficient algorithm is introduced to deal with the Coulomb singularity in the Brillouin zone sampling that is suitable for the NAO framework. We perform systematic convergence tests and identify a set of computational parameters, which can serve as the default choice for most practical purposes. Benchmark calculations are carried out for a set of prototypical semiconductors and insulators, and compared to independent reference values obtained from an independent $G_0W_0$ implementation based on linearized augmented plane waves (LAPW) plus high-energy localized orbitals (HLOs) basis set, as well as experimental results. With a moderate (FHI-aims \textit{tier} 2) NAO basis set, our $G_0W_0$ calculations produce band gaps that typically lie in between the standard LAPW and the LAPW+HLO results. Complementing \textit{tier} 2 with highly localized Slater-type orbitals (STOs), we find that the obtained band gaps show an overall convergence towards the LAPW+HLO results. The algorithms and techniques developed in this work pave the way for efficient implementations of correlated methods within the NAO framework.
description: 23 pages, 7 figures
A stochastic time-delayed model for the effectiveness of Moroccan COVID-19 deconfinement strategy
Creators: name: Zine, Houssine
name: Boukhouima, Adnane
name: Lotfi, El Mehdi
name: Mahrouf, Marouane
name: Torres, Delfim F. M.
name: Yousfi, Noura
Publisher: name: arXiv
Year: 2020
Subjects: subject: Populations and Evolution (q-bio.PE)
subject: Probability (math.PR)
subject: FOS: Biological sciences
subject: FOS: Mathematics
subject: 60H10, 92D30

description: Coronavirus disease 2019 (COVID-19) poses a great threat to public health and the economy worldwide. Currently, COVID-19 evolves in many countries to a second stage, characterized by the need for the liberation of the economy and relaxation of the human psychological effects. To this end, numerous countries decided to implement adequate deconfinement strategies. After the first prolongation of the established confinement, Morocco moves to the deconfinement stage on May 20, 2020. The relevant question concerns the impact on the COVID-19 propagation by considering an additional degree of realism related to stochastic noises due to the effectiveness level of the adapted measures. In this paper, we propose a delayed stochastic mathematical model to predict the epidemiological trend of COVID-19 in Morocco after the deconfinement. To ensure the well-posedness of the model, we prove the existence and uniqueness of a positive solution. Based on the large number theorem for martingales, we discuss the extinction of the disease under an appropriate threshold parameter. Moreover, numerical simulations are performed in order to test the efficiency of the deconfinement strategies chosen by the Moroccan authorities to help the policy makers and public health administration to make suitable decisions in the near future.
description: This is a preprint of a paper whose final and definite form is published by 'Mathematical Modelling of Natural Phenomena' at [http://doi.org/10.1051/mmnp/2020040]. Paper Submitted 16-May-2020; Revised 20-Aug-2020; Accepted 28-Oct-2020
Hilary Putnam e il linguaggio religioso: la fede come trasformazione della vita
Creators: name: Bastianelli, Marco
Publisher: name: Nuovo Giornale di Filosofia della Religione
Year: 2021

description: Hilary Putnam non è propriamente un filosofo della religione e, in effetti, la riflessione sulla fede occupa una posizione marginale nel suo percorso di ricerca. Del resto, in Rinnovare la filosofia, il filosofo americano confessa di essersi occupato prevalentemente di filosofia della scienza e di aver affrontato la questione religiosa soltanto «in modo indiretto».
description: Nuovo Giornale di Filosofia della Religione, N. 4 Settembre - Ottobre 2017
Luca Baccelli, Bartolomé de Las Casas. La conquista senza fondamento
Creators: name: Belloni, Claudio
Publisher: name: Nuovo Giornale di Filosofia della Religione
Year: 2021

description: Il fascino della figura di Bartolomé de Las Casas è legato alla vicenda esistenziale e all’inesausta militanza in favore della causa degli indiani d’America; non per nulla, rileva Luca Baccelli, gran parte dei volumi a lui dedicati appartiene al genere letterario della biografia intellettuale (p. 19). «L’esperienza esistenziale di Las Casas attraversa una serie di “conversioni” (da cappellano dei conquistadores ed encomendero a difensore degli indiani; da Realpolitiker riformista a profeta radicale; da sostenitore dell’utilizzazione degli schiavi africani ad abolizionista; da mite colonizzatore a critico del colonialismo) e il suo pensiero guadagna nel tempo in originalità e radicalità».
description: Nuovo Giornale di Filosofia della Religione, N. 4 Settembre - Ottobre 2017
Intervista a Elisa Grimi
Creators: name: Petcu, Tudor
Publisher: name: Nuovo Giornale di Filosofia della Religione
Year: 2021

description: Parlare di filosofia della religione oggi non solo è difficile ma in molti contesti può apparire una contraddizione. Che l'orizzonte della credenza sia incluso in quello del pensiero, non è una cosa che viene sempre accolta in modo pacifico dagli addetti ai lavori. Che poi si possa includere un orizzonte di trascendenza sul quale il pensiero dovrebbe trovare il suo sviluppo questa è una consapevolezza rara. Trovo molto interessante la considerazione di Adriano Fabris recentemente elaborata per una filosofia delle religioni. Oggi occorre parlare chiaro.
description: Nuovo Giornale di Filosofia della Religione, N. 4 Settembre - Ottobre 2017
Photonic spheres by microgel templating
Creators: name: Manne, Kalpana
name: Magkiriadou, Sofia
name: Demirörs, Ahmet
name: Yazhgur, Pavel
name: Scheffold, Frank
Publisher: name: Zenodo
Year: 2024
Subjects: Photonic spheres
templating
microgels
structural color
silica foams

description: We report on fabricating photonic spheres by combining submicron-sized microgelsand silica nanoparticles. By emulsifying the mixture and removing water through solvent drying,we achieve spheres of packed microgels measuring from a few micrometers to tens of micrometersin size. As the microgels de-swell, they exert pressure on the surrounding silica nanoparticles,forming a foam-like network within the droplet. The polymer microgels are then removed bycalcination, leaving behind a silica foam. These photonic spheres exhibit structural colors in thevisible spectral range, including challenging shades like red. The versatile approach we present here can pave the way for designing photonic pigments and be a step forward in understandinginverse structures with spherical morphology.
Sul significato dell'identità di filosofia e religione in Africano Spir
Creators: name: Bozza, Martino
Publisher: name: Nuovo Giornale di Filosofia della Religione
Year: 2021

description: Nel 1911 la casa editrice Carabba decide di portare all'attenzione del pubblico italiano uno scritto di Africano Spir, il titolo dato all'opera è Religione, si tratta di un estratto del volume Moralität und Religion del 1874. Il testo viene pubblicato nella Collana “Cultura dell'anima” ideata da Giovanni Papini due anni prima. È da subito importante sottolineare che la volontà dell'Editore, attraverso tale Collana, era quella di portare all'attenzione di studiosi e lettori quegli scritti filosofici ricchi di contenuti degni di approfondimento, ma poco conosciuti e diffusi nel panorama filosofico italiano. Da questo punto di vista, unitamente al fatto che questi sono gli anni in cui Papini mette in evidenza tutta la sua esigenza di sperimentare nuove strade di ricerca, si può ben comprendere che porre all'attenzione del contesto filosofico l'opera di Spir rappresenta un chiaro passo coerente con l'indirizzo della Collana: dare voce a quelle posizioni più originali e così poco diffuse in Italia.
description: Nuovo Giornale di Filosofia della Religione, N. 4 Settembre - Ottobre 2017
Lagrangian submanifolds and dynamics on Lie affgebroids
Creators: name: Iglesias, D.
name: Marrero, J. C.
name: Padrón, E.
name: Sosa, D.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Differential Geometry (math.DG)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 17B66; 53D12; 70G45; 70H03; 70H05; 70H20

description: We introduce the notion of a symplectic Lie affgebroid and their Lagrangian submanifolds in order to describe the Lagrangian (Hamiltonian) dynamics on a Lie affgebroid in terms of this type of structures. Several examples are discussed.
description: 50 pages. Several sections updated
Photonic spheres by microgel templating
Creators: name: Manne, Kalpana
name: Magkiriadou, Sofia
name: Yazhgur, Pavel
name: Demirörs, Ahmet
name: Scheffold, Frank
Publisher: name: Zenodo
Year: 2023
Subjects: Photonic spheres
templating
microgels
structural color
silica foams

description: We report on fabricating photonic spheres by combining submicron-sized microgelsand silica nanoparticles. By emulsifying the mixture and removing water through solvent drying,we achieve spheres of packed microgels measuring from a few micrometers to tens of micrometersin size. As the microgels de-swell, they exert pressure on the surrounding silica nanoparticles,forming a foam-like network within the droplet. The polymer microgels are then removed bycalcination, leaving behind a silica foam. These photonic spheres exhibit structural colors in thevisible spectral range, including challenging shades like red. The versatile approach we present here can pave the way for designing photonic pigments and be a step forward in understandinginverse structures with spherical morphology.
Color Skyrmions in the Quark-Gluon Plasma
Creators: name: Dai, Jian
name: Nair, V. P.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We consider the general formulation of nonabelian fluid dynamics based on symmetry considerations. We point out that, quite generally, this admits solitonic excitations which are the color analog of skyrmions. Some general properties of the solitons are discussed.
description: LaTeX, 13 pages, references added
Further Results on Coding for Reliable Communication over Packet Networks
Creators: name: Lun, Desmond S.
name: Medard, Muriel
name: Koetter, Ralf
name: Effros, Michelle
Publisher: name: arXiv
Year: 2005
Subjects: subject: Information Theory (cs.IT)
subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: In "On Coding for Reliable Communication over Packet Networks" (Lun, Medard, and Effros, Proc. 42nd Annu. Allerton Conf. Communication, Control, and Computing, 2004), a capacity-achieving coding scheme for unicast or multicast over lossy wireline or wireless packet networks is presented. We extend that paper's results in two ways: First, we extend the network model to allow packets received on a link to arrive according to any process with an average rate, as opposed to the assumption of Poisson traffic with i.i.d. losses that was previously made. Second, in the case of Poisson traffic with i.i.d. losses, we derive error exponents that quantify the rate at which the probability of error decays with coding delay.
description: 5 pages; to appear in Proc. 2005 IEEE International Symposium on Information Theory (ISIT 2005)
PATHOGENETIC MECHANISMS OF MICROCIRCULATION DISORDERS
Creators: name: Narzulaeva, Umida
Publisher: name: Zenodo
Year: 2024

description: In the pathogenesis of many diseases requiring intensive treatment, hypoxia, ischemia and acidosis occur due to deterioration of blood rheological properties, microcirculatory disorders and capillary trophic insufficiency. Disturbances in the hemorheological system constitute a common mechanism in the pathogenesis of critical conditions. Therefore, improvement of blood rheological properties, i.e. optimization, is an important direction of intensive therapy
Cool Versus Ultracool White Dwarfs
Creators: name: Farihi, J.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: A preliminary $BVRIJHK$ analysis of the white dwarfs SSSPM J2231$-$7514 and SSSPM J2231$-$7515 is presented. Although both stars were reported to have $T_{\rm eff}<4000$ K, the analysis here indicates $T_{\rm eff}\approx4250$ K for both SSSPM J2231$-$7514 and SSSPM J2231$-$7515. Given substantial scientific interest in the coolest extant degenerate stars, it is necessary to distinguish sub 4000 K objects from the bulk of cool white dwarfs. This analysis reiterates the importance of near infrared observations in constraining the spectral energy distributions and effective temperatures of the coolest white dwarfs and briefly discusses their possible origins.
description: 9 pages, 4 figures, 1 table, accepted to AJ
Ontologia dell’invocazione: il manifestarsi di una presenza, il perdurare di una compresenza
Creators: name: Caiffa, Ramon
Publisher: name: Nuovo Giornale di Filosofia della Religione
Year: 2021

description: L’unico modo per salvare non solo l’esperienza umana fondamentale, tale è l’atto di fede, ma anche e soprattutto per salvaguardare l’intimità e l’autenticità di ogni rapporto umano, nella sua purità morale ed etica, è l’elaborazione di un’ontologia dell’invocazione. Dal momento, però, che questo concetto, enunciato in questo modo, potrebbe apparire estremamente vago, una riflessione critico- speculativa si impone necessariamente, e per due motivi fondamentali. In primis, si mostrerà la necessità di elaborare una teoria chiamata ontologia dell’invocazione, secondariamente si doneranno forma e contenuto a una siffatta dottrina.
description: Nuovo Giornale di Filosofia della Religione, N. 5 Novembre - Dicembre 2017
An Observational Signature of Sub-Equipartition Magnetic Fields in the Spectra of Black Hole Binaries
Creators: name: Wallace, John
name: Pe'er, Asaf
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: A common assumption used in the study of accretion disks is that the magnetic energy density and the kinetic energy density should be in equipartition. This assumption relies on the faster growth rate of the magnetic field strength against the kinetic energy of the particles in the flow, for decreasing radius, combined with a dissipation mechanism that tends towards equipartition. In this paper, we examine this assumption by modeling the radio, mm and optical spectra of several black hole binaries in their quiescent state. We use a standard two-component disk model, consisting of an inner geometrically thick and optically thin disk, emitting thermal synchrotron radiation, along with an outer, thin disk, which radiates as a multicolor blackbody. We find that at the low accretion rates typical of the quiescent state, the spectral shape is qualitatively reproduced using magnetic fields that are between 0.1% and 1% of the equipartition value, considerably smaller than previously thought. We discuss our findings in view of (1) the launching of jets in these objects, which is commonly believed to rely on the presence of a strong magnetic field in the central region of the disk; and (2) the role of magnetic dissipation in the structure of the inflow.
description: 11 pages, 6 figures. Refereed version, accepted for publication in ApJ. Corrections to parameters of V404 Cyg and other minor changes
Near-Infrared Photometry of the High-Redshift Quasar RDJ030117+002025: Evidence for a Massive Starburst at z=5.5
Creators: name: Staguhn, J. G.
name: Stern, D.
name: Benford, D. J.
name: Bertoldi, F.
name: Djorgovski, S. G.
name: Thompson, D.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: With a redshift of z=5.5 and an optical blue magnitude M_B ~ -24.2 mag (~4.5 10^12 L_sun), RDJ030117+002025 is the most distant optically faint (M_B > -26 mag) quasar known. MAMBO continuum observations at lambda=1.2 mm (185 micrometer rest-frame) showed that this quasar has a far-IR luminosity comparable to its optical luminosity. We present near-infrared J- and K-band photometry obtained with NIRC on the Keck I telescope, tracing the slope of the rest frame UV spectrum of this quasar. The observed spectral index is close to the value of alpha_nu ~ -0.44 measured in composite spectra of optically-bright SDSS quasars. It thus appears that the quasar does not suffer from strong dust extinction, which further implies that its low rest-frame UV luminosity is due to an intrinsically-faint AGN. The FIR to optical luminosity ratio is then much larger than that observed for the more luminous quasars, supporting the suggestion that the FIR emission is not powered by the AGN but by a massive starburst.
description: 6 pages, APJ in press
Eine Reise in den Widerspruch - oder eine typisch-japanische Theologie
Creators: name: Fritsch-Oppermann, Sybille
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 37 Nr. 3 (1988): Ökumenische Rundschau, Band 37, Heft 3
Educating for wisdom : an inquiry into value
Creators: name: Priestman, Scott
Publisher: name: University of British Columbia
Year: 2009

description: Many of today's children find themselves with an unprecedented amount of freedom to choose what sort of life to pursue. A corollary of this freedom however is the burden of sorting through the many options which life offers. Without some guidance in wading through this values-minefield, some children simply become stuck, unable to choose or to choose well. What is a good life? What sorts of goods in life ought we to pursue? These questions motivate the present project but they are not ones which I attempt to answer. Instead, I examine the kinds of tools that could help students to answer such questions in a thoughtful, intelligent and caring way. In order to live a good life, we need to choose well regarding what is valuable. In this thesis I argue that such a process, choosing well about what is valuable, is the result of wisdom. Wisdom is that set of characteristics which allows us to live well. This thesis is the development and justification of this conception of wisdom. It explores how wisdom is related to three key concepts: knowledge, value and morality. I do not argue that this is the only way to think about wisdom. However, it is a way of thinking about wisdom which could usefully and justifiably find a place in the educational system of a liberal democratic state. This thesis is an attempt to understand how educators can teach for the most important goal in life: how to live well.
The changing milliarcsecond radio morphology of the gamma-ray binary LS 5039
Creators: name: Ribo, M.
name: Paredes, J. M.
name: Moldon, J.
name: Marti, J.
name: Massi, M.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Context. LS 5039 is one of the few TeV emitting X-ray binaries detected so far. The powering source of its multiwavelength emission can be accretion in a microquasar scenario or wind interaction in a young nonaccreting pulsar scenario. Aims. To present new high-resolution radio images and compare them with the expected behavior in the different scenarios. Methods. We analyze Very Long Baseline Array (VLBA) radio observations that provide morphological and astrometric information at milliarcsecond scales. Results. We detect a changing morphology between two images obtained five days apart. In both runs there is a core component with a constant flux density, and an elongated emission with a position angle (PA) that changes by 12+/-3 degrees between both runs. The source is nearly symmetric in the first run and asymmetric in the second one. The astrometric results are not conclusive. Conclusions. A simple and shockless microquasar scenario cannot easily explain the observed changes in morphology. An interpretation within the young nonaccreting pulsar scenario requires the inclination of the binary system to be very close to the upper limit imposed by the absence of X-ray eclipses.
description: To be published in A&A main journal. 5 pages, 1 figure. A reference has been corrected
Variazioni sulla Fine del mondo
Creators: name: Ceravolo, Tonino
Publisher: name: Nuovo Giornale di Filosofia della Religione
Year: 2021

description: La presenza nell’ultimo De Martino della “proposta” di una “antropologia della storia” è stata evidenziata, com’è noto, da Daniel Fabre, che ha individuato nel grande etnologo e nella fedeltà al suo primo libro, Naturalismo e storicismo nell’etnologia, una sorta di programma di ricerca elaborato anche nel rifiuto dell’antropologia della cultura di Claude Lévi-Strauss
description: Nuovo Giornale di Filosofia della Religione, N. 5 Novembre - Dicembre 2017
Non-linear quantum effects in electromagnetic radiation of a vortex electron
Creators: name: Karlovets, D. V.
name: Pupasov-Maksimov, A. M.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: There is a controversy of how to interpret interactions of electrons with a large spatial coherence with light and matter. When such an electron emits a photon, it can do so either as if its charge were confined to a point within a coherence length, the region where a square modulus of a wave function $|ψ|^2$ is localized, or as a continuous cloud of space charge spread over it. This problem was addressed in a recent study R.~Remez, et al., Phys. Rev. Lett. {\bf 123}, 060401 (2019) where a conclusion was drawn in favor of the first (point) interpretation. Here we argue that there is an alternative explanation for the measurements reported in that paper, which relies on purely classical arguments and does not allow one to refute the second interpretation. We propose an experiment of Smith-Purcell radiation from a non-relativistic vortex electron carrying orbital angular momentum, which can unambiguously lead to the opposite conclusion. Beyond the paraxial approximation, the vortex packet has a non-point electric quadrupole moment, which grows as the packet spreads and results in a non-linear $L^3$-growth of the radiation intensity with the length $L$ of the grating when $L$ is much larger than the packet's Rayleigh length. Such a non-linear effect has never been observed for single electrons and, if detected, it would be a hallmark of the non-point nature of charge in a wave packet. Thus, two views on $|ψ|^2$ are complementary to each other and an electron radiates either as a point charge or as a continuous charge flow depending on the experimental conditions and on its quantum state. Our conclusions hold for a large class of non-Gaussian packets and emission processes for which the radiation formation length can exceed the Rayleigh length, such as Cherenkov radiation, transition radiation, diffraction radiation, and so forth.
description: 25 pages; 4 figures
General cosmological perturbations in teleparallel gravity
Creators: name: Hohmann, Manuel
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We discuss linear perturbations of the most general class of teleparallel spacetimes with cosmological symmetry, and perform a decomposition of these perturbations into irreducible components. We then study their behavior under gauge transformations, i.e., infinitesimal diffeomorphisms of the background spacetime, and derive a full set of gauge-invariant perturbation variables. Comparing our results with perturbations around the diagonal tetrad corresponding to a spatially flat teleparallel background cosmology, we see the appearance of new terms which depend on the particular choice of a cosmologically symmetric background tetrad. Finally, we demonstrate the application of our findings to teleparallel gravity theories. For convenience, results are displayed both in general and conformal coordinates.
description: 18 pages, no figures; invited contribution to the Eur. Phys. J. Plus focus point "Modified Gravity Theories and Cosmology"; updated references to accepted version
Quenched free energy in random matrix model
Creators: name: Okuyama, Kazumi
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We compute the quenched free energy in the Gaussian random matrix model by directly evaluating the matrix integral without using the replica trick. We find that the quenched free energy is a monotonic function of the temperature and the entropy approaches $\log N$ at high temperature and vanishes at zero temperature.
description: 12 pages; v2) section on the large N limit removed. v3) to appear in JHEP
Roberto Celada Ballanti, La parabola dei tre anelli. Migrazioni e metamorfosi di un racconto
Creators: name: Brino, Omar
Publisher: name: Nuovo Giornale di Filosofia della Religione
Year: 2021

description: La vicenda narrativo-metaforica dei tre anelli - le cui più cospicue versioni sono, nella tradizione occidentale, la “novelletta” terza del primo libro del Decamerone e la “storiella” (Geschichtchen) al centro del Nathan der Weise di Lessing - costituisce, in questo nuovo, ricchissimo libro di Roberto Celada Ballanti (i numeri di pagina successivi si riferiranno, ove non diversamente indicato, a questo volume), il fuoco di un «autentico 'discorso sul metodo' del dialogo tra le religioni» (p. 61 e p. 202).
description: Nuovo Giornale di Filosofia della Religione, N. 5 Novembre - Dicembre 2017
Detecting Extrasolar Planets with Integral Field Spectroscopy
Creators: name: Berton, A.
name: Gratton, R. G.
name: Feldt, M.
name: Henning, T.
name: Desidera, S.
name: Turatto, M.
name: Schmid, H. M.
name: Waters, R.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Observations of extrasolar planets using Integral Field Spectroscopy (IFS), if coupled with an extreme Adaptive Optics system and analyzed with a Simultaneous Differential Imaging technique (SDI), are a powerful tool to detect and characterize extrasolar planets directly; they enhance the signal of the planet and, at the same time, reduces the impact of stellar light and consequently important noise sources like speckles. In order to verify the efficiency of such a technique, we developed a simulation code able to test the capabilities of this IFS-SDI technique for different kinds of planets and telescopes, modelling the atmospheric and instrumental noise sources. The first results obtained by the simulations show that many significant extrasolar planet detections are indeed possible using the present 8m-class telescopes within a few hours of exposure time. The procedure adopted to simulate IFS observations is presented here in detail, explaining in particular how we obtain estimates of the speckle noise, Adaptive Optics corrections, specific instrumental features, and how we test the efficiency of the SDI technique to increase the signal-to-noise ratio of the planet detection. The most important results achieved by simulations of various objects, from 1 M_J to brown dwarfs of 30 M_J, for observations with an 8 meter telescope, are then presented and discussed.
description: 60 pages, 37 figures, accepted in PASP, 4 Tables added
Jean-Michel Maldamé, Création et créationnisme
Creators: name: Marchesi, Angelo
Publisher: name: Nuovo Giornale di Filosofia della Religione
Year: 2021

description: “Création et créationnisme” è il titolo della trattazione riguardante il tema della “creazione” che l’Autore contrappone al “creazionismo” in quanto questo secondo termine assume un senso peggiorativo perché intende: “designare un movimento di pensiero che si appoggia sul testo biblico per respingere le acquisizioni della scienza attuale, in particolare la teoria dell’evoluzione”.
description: Nuovo Giornale di Filosofia della Religione, N. 5 Novembre - Dicembre 2017
Studies of Boosted Decision Trees for MiniBooNE Particle Identification
Creators: name: Yang, Hai-Jun
name: Roe, Byron P.
name: Zhu, Ji
Publisher: name: arXiv
Year: 2005
Subjects: subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: FOS: Physical sciences

description: Boosted decision trees are applied to particle identification in the MiniBooNE experiment operated at Fermi National Accelerator Laboratory (Fermilab) for neutrino oscillations. Numerous attempts are made to tune the boosted decision trees, to compare performance of various boosting algorithms, and to select input variables for optimal performance.
description: 28 pages, 22 figures, submitted to Nucl. Inst & Meth. A
The Coulomb and Higgs Branches of $\mathcal{N}=1$ Theories of Class $\mathcal{S}_k$
Creators: name: Bourton, Thomas
name: Pini, Alessandro
name: Pomoni, Elli
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Even though for generic $\mathcal{N}=1$ theories it is not possible to separate distinct branches of supersymmetric vacua, in this paper we study a special class of $\mathcal{N}=1$ SCFTs, these of Class $\mathcal{S}_k$ for which it is possible to define Coulomb and Higgs branches precisely as for the $\mathcal{N}=2$ theories of Class $\mathcal{S}$ from which they descend. We study the BPS operators that parameterise these branches of vacua using the different limits of the superconformal index as well as the Coulomb and Higgs branch Hilbert Series. Finally, with the tools we have developed, we provide a check that six dimensional $(1,1)$ Little String theory can be deconstructed from a toroidal quiver in class $\mathcal{S}_k$
description: 58 pages
La Metafisica vivente dell’Icona
Creators: name: Rizzi, Francesco
Publisher: name: Nuovo Giornale di Filosofia della Religione
Year: 2021

description: La riflessione teologica sull’immagine di Cristo si sviluppa in tutta la storia della Chiesa. L’arte protocristiana è condizionata da un fattore ‘ad intra’, il divieto veterotestamentario, e da un fattore ‘ad extra’, l’ellenismo, il cui orizzonte culturale è il platonismo. Dai primi decenni del IV secolo vi è uno sviluppo progressivo del pensiero teologico sulla concezione e sulla funzione dell’immagine sacra, nella tensione dialettica fra lo scongiurare l’idolatria e il riconoscerla come luogo della presenza del divino (icona), poiché il suo fondamento è il mistero dell’Incarnazione. Infatti, la domanda su cui verte la speculazione filosofico-teologica è se, e come, sia possibile ‘circoscrivere’ in un’immagine la Parola di Dio incarnata.
description: Nuovo Giornale di Filosofia della Religione, N. 5 Novembre - Dicembre 2017
Az árvízmentesítés létesítményeinek szerepe az árvízkárok megelőzésében
Creators: name: Örs, Antal
name: Hornyacsek Júlia
Publisher: name: Magyar Hadtudományi Társaság
Year: 2015

description: Hadtudomány. 2015. évi (25. évf.) elektronikus lapszám
M. Damonte, Homo orans. Antropologia della preghiera, Edizioni Fondazione Centro Studi Campostrini, Verona 2014, 305 pp.
Creators: name: Vaccarezza, Maria Silvia
Publisher: name: Nuovo Giornale di Filosofia della Religione
Year: 2021

description: Marco Damonte non è nuovo a pubblicazioni che dimostrano una certa audacia: ne aveva dato prova col suo Wittgenstein, Tommaso e la cura dell’intenzionalità (Firenze Atheneum 2009), nel quale aveva “osato”, sulla scorta del cosiddetto tomismo analitico di matrice anglosassone, accostare il geniale austriaco all’Aquinate, operazione scandalosa tanto per una certa tradizione analitica, quanto per alcuni tomisti (certamente in Italia, ma non solo). Ne dà prova anche oggi, con un volume originale e coraggioso: perché tali sono le virtù intellettuali necessarie a riproporre oggi la tematica della preghiera, e farlo non per conservatorismo o per interesse archeologico, ma con autentico rigore filosofico, alla luce di categorie attuali, che ne mostrino la persistenza e pertinenza.
description: Nuovo Giornale di Filosofia della Religione, N. 6 Gennaio - Aprile 2018