Search results for "Centri"
showing 10 items of 869 documents
THE DIASCIA FLOWER AND ITS BEE - AN OIL-BASED SYMBIOSIS IN SOUTHERN AFRICA
1984
As has been formerly shown, the double-spurred flowers of the South African genus Diascia (Scrophulariaceae) produce fatty oil as a primary attractant. Their oil-collecting pollinators have so far remained unknown. It is concluded from the morphology and from direct evidence of flower visitation that the recently established Melittid genus Rediviva represents the co-evolved pollinator group of these plants, at the same time demonstrating the presence of “manual” oil collectors in Southern Africa. The bees must introduce their especially equipped forelegs into the paired spurs of Diascia for harvesting the oil, thereby pollinating the flower. In the described case, a new species, Rediviva em…
Between Life and Existence. Heidegger’s Aristotelianism and the Question of Animality
2021
This paper starts by investigating the Aristotelian roots of Heidegger’s stance toward animal life from 1924 lecture course “Basic concepts of Aristotelian philosophy” to 1929/30 lecture course “The fundamental concepts of Metaphysics”. In following Aristotle, Heidegger displays the ontological transition from life to existence as grounded to the peculiar linguistic ability of human beings. In doing that, both Heidegger and Aristotle seem to establish a connection between an existential faculty (logos) and the apparently dominant position occupied by our species. On the other side, though, to be endowed with logos means for human beings to be able to de-centre themselves in recognizing the …
Place and Positionality – Anthropo(topo)logical Thinking with Helmuth Plessner
2018
This paper explores a possible anthropological dimension of place by providing an interpretation of Helmuth Plessner’s philosophical approach which proposes to understand it as a twofold “implacement” of man – discussing both the place of man in the natural world and man’s specific relation to place that makes him take his place in the natural world. The interpretation follows Plessner’s idea of a natural set of stages, developed in his major work Die Stufen des Organischen und der Mensch, leading from inanimate objects to plants, animals, and humans. According to Plessner, each stage differs from the other by virtue of its respective spatial delineation toward, and its position in, the wor…
La antropología como ciencia libidinosa. Diderot y el viaje de Bougainville
2005
Son innumerables los estudios que han abordado, desde temprano, la historia de la constitución de la antropología como disciplina empírica con vocación 'científica', como una de las ciencias humanas. Se muestra así una cierta obsesión por los orígenes, quizá síntoma de una frágil identidad. Uno de esos textos, de los más tempranos, The History of Anthropology} 1 fue escrito por Boas justo al principio del siglo pasado (1904) y tiene por objeto -fue una conferencia dada ante un publico académico variopintoreflexionar históricamente sobre una disciplina que todavía se debate para delimitar cuál es su objeto y método epistemológicos. Boas advierte desde el principio que no va a proceder dicien…
Nuove relazioni tra tessuto urbano e agricolo nel Parco del Gugliotta a Piano Tavola a Carini
2014
A sud-ovest della città di Palermo, lungo la fascia a nord-est dellʼabitato di Carini, segnata da monte Colombrina e attraversata dal torrente Gugliotta, si estende tra città e campagna unʼampia zona, denominata Piano Tavola. Elementi differenti ne costituiscono i margini: la frangia urbana dei volumi che si attestano sullʼasse di corso Italia (a ovest), lʼuliveto sotto Pizzo Castellaccio (a est), la villa Dominici (a nord-est), lʼarea industriale e il tracciato ferroviario (a nord) e la cava in località Manostalla (a sud-est). La lettura del paesaggio evidenzia la pressione esercitata dal costruito verso lʼuliveto e la campagna, la presenza di strade che cingono il quartiere isolandolo e l…
Metafisica, vita, esistenza. Ancora su Heidegger e Aristotele
2018
Uno studio sulla questione dell'antropocentrico e dell'animalità tra Aristotele, Heidegger e le relative interpretazioni
Per una lettura non antropocentrica della filosofia della natura di Aristotele
2019
L'articolo presenta una lettura non antropocentrica della filosofia della natura di Aristotele facendo leva su tre punti chiave: 1. Aristotele non è il padre dei saperi specialistici. Le opere biologiche sono il fulcro del programma di ricerca aristotelico sulla natura, fulcro dell'intero Corpus aristotelicum. 2. Nelle scienze naturali Aristotele è un continuista: fra le diverse forme di vita (vegetale e animale, animale e umana) i passaggi avvengono con continuità. Proprio da lui si origina il detto secondo cui natura non facit saltus. 3. I passi in cui Aristotele sembra esprimersi a favore di una biologia antropocentrica – e ciò non solo nella Politica, ma anche nelle opere biologiche, ad…
Astrochronology of the Valanginian stage from GSSP candidates and hypostratotype.
2013
Valanginian; Astrochronology; Gamma-ray spectrometry; Weissert event; Paraná-Etendeka; International audience; The Valanginian Stage currently displays no radiometric age, which severely hampers palaeoceanographic reconstructions for this time interval. An astrochronology of the Valanginian Stage using the stable 405-kyr eccentricity cycle was performed on biostratigraphically well-calibrated standard sections from the Vocontian Basin (southeastern France). High-resolution gamma-ray spectrometry signals were obtained from orbitally driven marl-limestone alternations from five sections in the basin, and they display the same long-term trends. The spectral analyses present the pervasive recor…
Search for eccentric binary black hole mergers with advanced LIGO and advanced Virgo during their first and second observing runs
2019
When formed through dynamical interactions, stellar-mass binary black holes may retain eccentric orbits ($e>0.1$ at 10 Hz) detectable by ground-based gravitational-wave detectors. Eccentricity can therefore be used to differentiate dynamically-formed binaries from isolated binary black hole mergers. Current template-based gravitational-wave searches do not use waveform models associated to eccentric orbits, rendering the search less efficient to eccentric binary systems. Here we present results of a search for binary black hole mergers that inspiral in eccentric orbits using data from the first and second observing runs (O1 and O2) of Advanced LIGO and Advanced Virgo. The search uses min…
The Cultivation of Astronomy in Spanish Universities in the Latter Half of the 16th Century
2006
The four universities known to have taught mathematics in the 16th century in what is now known as Spain, were Salamanca, Valencia, Alcala, and, at the end of the century, Seville. In addition to being taught at university, astronomy was also taught in other institutions such as for example, the Casa de la Contratacion of Seville, the so-called Mathematics Academy of Madrid, certain naval academies and, towards the end of the century, certain Jesuit schools. At the University of Valencia, following the official foundation of the Estudi or center of learning in 1500, a chair of mathematics was set up in 1503, although we have no documentary evidence of the subjects taught there in the early …