279 research outputs found
Il bello di essere aristocratici
No full textQuesto volume muove da problematiche che si addensano sul nodo della paideia in Aristotele: oltre al rapporto con la scholé, qual è la connessione dell’educazione con il governo, con la felicità e con il piacere? Si può educare alla scienza? Quale lo statuto epistemologico di una qualsiasi educazione? Chi è l’uomo colto? Ma soprattutto l’educazione è politica? Sono alcune delle domande qui affrontate, domande che si offrono anche per un ripensamento, più generale, dell’educazione ai nostri giorni. Ecco i contributi: G. Angelini: Introduzione/A. Jori: La paideia e l’uomo colto in Aristotele/A. Volpone: Filosofia e dialettica tra Paideia antica e contemporanea/M. Di Febo: Educare l’animale politico, un uomo in due nature/A. Fermani: L’importanza di educare al buon uso del tempo e alla differenza tra passatempo e σχολή/G.B. Magnoli Bocchi: Il bello di essere aristocratici/ V. Suñol: L’educazione musicale in Aristotele/L. Palpacelli: Educati al piacere. Il nesso tra paideia ed hedone/L.M. Napolitano: Platone, Aristotele e un’educazione sentimentale? / M. Berrón: L’educazione scientifica nel De partibus animalium / M. Zanatta: L’educazione all’episteme in Aristotele
Community-level Impacts of a Dominant Plant Invader on Native and Exotic Vegetation in a Coastal Dune Ecosystem
No full textThe spread of invasive, non-native species is a global phenomenon and has been recognized as a critical source of environmental change. Despite the prominence of these widely-occurring invasions, surprisingly few studies have quantified the impact of invasive plant species on the communities they invade or considered the degree to which different components of the plant community respond to invader removal. Here we summarize the results of a comparative study and two field experiments designed to evaluate the impact of an invasive South African succulent, common iceplant (Carpobrotus edulis), on native and exotic vegetation in a coastal dune ecosystem in northern California. Our results indicate that iceplant negatively impacted the performance and species richness of native perennial forbs. Our comparative study showed that cover of native annual forbs was lower in iceplant-invaded areas than in uninvaded ones, but that abundance and richness did not differ. The performance and richness of exotic annual forbs also did not differ between invaded and uninvaded areas, but performance and richness of exotic annual grasses was greater in invaded areas than uninvaded ones. In contrast, results from our removal experiment showed that iceplant negatively affected the performance and species richness of native and exotic annual forbs, and had no impact on exotic annual grasses. We hypothesize that these differences between our comparative and experimental results were due to iceplant patches trapping seeds, which subsequently germinated following iceplant removal. We also found that iceplant negatively affected another dominant invader, Bromus diandrus, by altering soil properties and that soil remained altered even 10 months after iceplant removal. In summary, we found that iceplant had both positive and negative impacts on different plant groups in the community as well as had residual effects on soil These findings suggest that iceplant removal will often be associated with a mixture of desirable and undesirable effects - native plants will respond positively to removal but so will other exotic taxa. Thus, other exotic species would need to be controlled after iceplant removal to effectively restore iceplant-invaded areas.This research was supported through research grants from the California Native Plant Society statewide and Milo Baker chapters and the Northern California Botanists
Nodal mature plasmacytoid dendritic cell proliferation mimicking lymphoma in a patient with CALR-mutated myelofibrosis
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Correction induced by irrelevant operators in the correlators of the 2d Ising model in a magnetic field
No full textAnomalous Charge Tunneling in Fractional Quantum Hall Edge States at a Filling Factor<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>ν</mml:mi><mml:mo>=</mml:mo><mml:mn>5</mml:mn><mml:mo>/</mml:mo><mml:mn>2</mml:mn></mml:math>
No full textNumerical determination of the operator-product-expansion coefficients in the 3D Ising model from off-critical correlators
No full textWe propose a general method for the numerical evaluation of operator product expansion coefficients in three dimensional conformal field theories based on the study of the conformal perturbation of two point functions in the vicinity of the critical point. We test our proposal in the three dimensional Ising model, looking at the magnetic perturbation of the (r)σ(0) (r)ε(0) and (r)ε(0) correlators from which we extract the values of C=1.07(3) and Cεεε=1.45(30). Our estimate for C agrees with those recently obtained using conformal bootstrap methods, while C, as far as we know, is new and could be used to further constrain conformal bootstrap analyses of the 3d Ising universality class
Conformal perturbation of off-critical correlators in the 3D Ising universality class
No full textThanks to the impressive progress of conformal bootstrap methods we have now very precise estimates of both scaling dimensions and operator product expansion coefficients for several 3D universality classes. We show how to use this information to obtain similarly precise estimates for off-critical correlators using conformal perturbation. We discuss in particular the σ(r)σ(0),(r)ε(0) and σ(r)ε(0) two-point functions in the high and low temperature regimes of the 3D Ising model and evaluate the leading and next to leading terms in the s=trΔt expansion, where t is the reduced temperature. Our results for σ(r)σ(0) agree both with Monte Carlo simulations and with a set of experimental estimates of the critical scattering function
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