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Search Results: 1 - 10 of 12492 matches for " Christopher Ranalli "
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Rorty, Williams, and Davidson: Skepticism and Metaepistemology
Duncan Pritchard,Christopher Ranalli
Humanities , 2013, DOI: 10.3390/h2030351
Abstract: We revisit an important exchange on the problem of radical skepticism between Richard Rorty and Michael Williams. In his contribution to this exchange, Rorty defended the kind of transcendental approach to radical skepticism that is offered by Donald Davidson, in contrast to Williams’s Wittgenstein-inspired view. It is argued that the key to evaluating this debate is to understand the particular conception of the radical skeptical problem that is offered in influential work by Barry Stroud, a conception of the skeptical problem which generates metaepistemological ramifications for anti-skeptical theories. In particular, we argue that, contra Williams, Rorty’s view that Davidson was offering a theoretical diagnosis of radical skepticism can be consistently maintained with his transcendental approach.
Microbiological treatment of oil mill waste waters
Ranalli, A.
Grasas y Aceites , 1992,
Abstract: Experiments of the biological treatment of the oil mill waste waters, deriving from continuous system, have been carried out with selected mutant ferments, adapted to rather forced toxic conditions. The commercial microbio formulations SNKD, LLMO and PSBIO have been utilized; the last two are liquid suspensions, constituted by living micro-organisms that, in contrast to those frozen or lyophilized, do not need be revitalized before their use and became completely active in short time. The experiments with the SNKD biological preparation were carried out both on filtered oil mill outflows (type A) with an initial COD of approximately 43 g/l and on waste water dephenolized by Caro-acid (type B) with a COD equal to 30 g/l. The experiments with LLMO and PSBIO complexes were conduced both on oil mill outflows filtered and diluted (ratio 1:0.5) with an initial COD equal to 44 g/l (type C), and on waste water that were filtered and preventatively subjected to a cryogenic treatment (type D), with an initial COD of approximately 22 g/l. The residual COD with the microbio formulation SNKD, was about 15 g/l (type A) and 5 g/l (type B); with the PSBIO It was about 7 g/l (type C) and 1.5 g/l (type D); with the microbio formulation LLMO it resulted in 6 g/l (type C) and 1.3 g/l (type D). Han sido efectuadas pruebas de tratamiento biológico de alpechines, provenientes de sistemas continuos, con fermentos seleccionados adaptados a condiciones de toxicidad muy elevadas. Han sido utilizadas las formulaciones microbianas SNKD, LLMO y PSBIO; las dos últimas son suspensiones líquidas, constituidas por microorganismos vivos, los cuales a diferencia de los liofilizados o congelados, no deben ser revitalizados antes del uso; estos tienen una fase lag más breve y entran antes en completa actividad. Las pruebas con la preparación biológica SNKD han sido efectuadas en los alpechines filtrados (tipo A) con DQO inicial alrededor de 43 g/l, y también con alpechín filtrado defenolado con ácido de Caro (H2SO5 (tipo B), con DCX) igual a 30 g/l; los complexos LLMO y PSBIO se utilizan en alpechines provenientes de la elaboración de otras variedades de aceitunas, filtradas y diluidas en la relación 1:0,5 (tipo C) con DQO inicial igual a 44 g/l, y también en alpechín filtrado y sometido previamente a criotratamiento (tipo D), con DQO inicial de 22 g/l aproximadamente. La DQO residual, con la formulación microbiana SNKD, ha resultado igual a 15 g/l (Tipo A) y a 5 g/l (tipo B), con el PSBIO a 7 g/l (tipo C) y a 1,5 g/l (tipo D); con la formulación microbiana LLMO a 6 g/l (tipo C) y a 1,3
A statistical study of aftershock sequences
Giorgio Ranalli
Annals of Geophysics , 2010, DOI: 10.4401/ag-4645
Abstract: A comprehensive statistical study of the phenomenology of aftershock sequences is made in this paper. The spatial distribution of aftershocks indicates that they are mainly crustal events; however, deeper sequences also take place. The analysis of the distribution of aftershocks in 15 sequences with respect to time and magnitude leads to the statistical confirmation of a set of phenomenological laws describing the process, namely, the time-frequency law of hyperbolic decay of aftershock activity with time, the magnitude stability law, and the exponential magnitude- frequency distribution. The hypotheses involved are checked. The grouping of data and the statistical methods employed are chosen according to some basic well·confirmed assumptions regarding the nature of the process.
Steady-state creep in the mantle
Annals of Geophysics , 1977, DOI: 10.4401/ag-4831
Abstract: SUMMARY - The creep equations for steady-state flow of olivine at high pressure and temperature are compared in an attempt to elucidate the rheological behaviour of the mantle. Results are presented in terms of applied deformation maps and curves of effective viscosity v depth. In the upper mantle, the transition stress between dislocation and diffusion creep is between 10 to 102 bar (as orders of magnitude) for grain sizes from 0.01 to 1 cm. The asthenosphere under continents is deeper, and has higher viscosity, than under oceans. Predominance of one creep mechanism above the others depends on grain size, strain rate, and volume fraction of melt; the rheological response can be different for different geodynamic processes. In the lower mantle, on the other hand, dislocation creep is predominant at all realistic grain sizes and strain rates. If the effective viscosity has to be only slightly higher than in the upper mantle, as some interpretations of glacioisostatic rebound suggest, then the activation volume cannot be larger than 11 cm3 mole^1.
Transform faults and large horizontal displacements of the ocean floor
Annals of Geophysics , 1968, DOI: 10.4401/ag-5074
Abstract: The evidence concerning the existence of transform faults and the occurrence of sea-floor spreading is reviewed and discussed. Available fault-plane solutions indicate that the direction of motion along some oceanic fracture zones is opposite to that which would be expected in case of transcurrent faults. The support for the sea-floor spreading hypothesis comes mainly from magnetic investigations. The problem, however, presents formidable dynamic and rheological aspects, and is far from being completely solved.
A Statistical Study of Aftershock Sequences
Annals of Geophysics , 1969, DOI: 10.4401/ag-5094
Abstract: .
Rheology and deep tectonics
G. Ranalli
Annals of Geophysics , 1997, DOI: 10.4401/ag-3893
Abstract: The distribution of the rheological properties of the lithosphere in space, and their variations in time, have a profound effect on the resulting tectonic deformation. A classical way of estimating these properties makes use of rheological profiles (strength envelopes). Although rheological profiles are based on assumptions and approximations which limit their resolving power, they are an efficient first-order tool for the study of lithosphere rheology, and their application clarifies the dynamics of tectonic processes. Two examples of the interaction of rheology and tectonics are discussed, namely, the post-orogenic relaxation of Moho topography (which is an additional factor to be considered in tectonic inversion), and the strength control on the level of necking in extension (which may lead to apparent local isostasy at passive continental margins and in sedimentary basins).
Processing, new food application and development of improved bean cultivars
Ranalli P.
Biotechnologie, Agronomie, Société et Environnement , 1999,
The evolution of star forming galaxies with the Wide Field X-ray Telescope
Piero Ranalli
Physics , 2010,
Abstract: Star forming galaxies represent a small yet sizable fraction of the X-ray sky (1%-20%, depending on the flux). X-ray surveys allow to derive their luminosity function and evolution, free from uncertainties due to absorption. However, much care must be put in the selection criteria to build samples clean from contamination by AGN. Here we review the possibilities offered by the proposed WFXT mission for their study. We analyze the expected luminosity and redshift distributions of star forming galaxies in the proposed WFXT surveys. We discuss the impact of such a mission on the knowledge of the cosmic star formation history, and provide a few suggestions.
Charge-exchange emission in the starburst galaxies M82 and NGC3256
Piero Ranalli
Physics , 2012, DOI: 10.1002/asna.201211669
Abstract: Charge-exchange (CE) emission produces features which are detectable with the current X-ray instrumentation in the brightest near galaxies. We describe these aspects in the observed X-ray spectra of the star forming galaxies M82 and NGC 3256, from the Suzaku and XMM-Newton telescopes. Emission from both ions (O, C) and neutrals (Mg, Si) is recognised. We also describe how microcalorimeter instrumentation on future missions will improve CE observations.
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