15,127 research outputs found
La persona tra "insecuritas" e fondamento: funzione e storia dei riti nell'opera di Ernesto De Martino
No full textIl saggio segue lo svolgersi del problema della persona nell'opera di Ernesto De Martino, nelle sue relazioni con gli studi internazionali di carattere etnologico, storico-religioso e filosofico
Memoirs of San Martino, Italy and History of the San Martino Club in Trail, B.C
No full textThis paper details the history of Italian immigrants in Trail, their homeland in San Martino, Italy, and the activities that the San Martino Club puts on in Trail. Food, games, and other cultural traditions are described, having been brought over from Italy to Canada, and kept alive in part through the communal effort of the San Martino Club.Student paper submitted for Anthropology 101
Reaction Networks as Systems for Resource Allocation: A Variational Principle for Their Non-Equilibrium Steady States
No full textWithin a fully microscopic setting, we derive a variational principle for the non-equilibrium steady states of chemical reaction networks, valid for time-scales over which chemical potentials can be taken to be slowly varying: at stationarity the system minimizes a global function of the reaction fluxes with the form of a Hopfield Hamiltonian with Hebbian couplings, that is explicitly seen to correspond to the rate of decay of entropy production over time. Guided by this analogy, we show that reaction networks can be formally re-cast as systems of interacting reactions that optimize the use of the available compounds by competing for substrates, akin to agents competing for a limited resource in an optimal allocation problem. As an illustration, we analyze the scenario that emerges in two simple cases: that of toy (random) reaction networks and that of a metabolic network model of the human red blood cell. © 2012 De Martino et al
Antropologia, critica, riflessività in Ernesto de Martino
No full textIl capitolo ricostruisce alcuni aspetti della ricerca e della riflessione di Ernesto de Martino, soprattutto quel suo concetto di "etnocentrismo critico" che appare, se interpretato con gli strumenti dell'antropologia contemporanea, molto vicino alle odierne prospettive critico-riflessive e dialogiche
B->Xs,d gamma and B->Xs,d l+l-
No full textFlavour Changing Neutral Current transitions B
→ Xs/d γ and B → Xs/d l
+
l − provide an excellent
laboratory for the search for physics beyond the Standard Model and for the study of the dynamics
of b-quark inside B mesons.
B
→ Xs/d γ and B → Xs/d l
+
l − decays are selected from the samples of events collected by the
BaBar, Belle and CDF detectors by means of several strategies.
Standard Model tests are performed through measurements of inclusive BR(B
→ Xs/d γ ), BR(B →
Xs/d l +l −), CP and isospin asymmetries, and the study of the relevant angular distributions in
B
→ Xs/d l
+
l − decays.
A
|Vt d /Vt s | measurement with reduced theoretical uncertainties is obtained from the branching
fraction ratio BR(b
→ d γ )/BR(b → sγ ).
The most precise
|Vcb | determination is extracted by global fits to the moments of inclusive dis-
tributions in B
→ Xc l ν and B → Xs γ using the kinetic mass scheme. Uncertainties on shape
functions in the measurement of
|Vub | using inclusive semileptonic decays B → Xu l ν are limited
by comparing the partial rates for B
→ Xu l ν and B → Xs γ in restricted phase space regions
Pleurocodonellina javanensis Martino & Taylor 2018, n. sp.
No full textPleurocodonellina javanensis n. sp. (Figs 81–85; Table 18) Figured material. Holotype, RGM.1350564, early Pleistocene, Java. Diagnosis. Colony encrusting. Autozooids polygonal. Frontal shield dimpled with a single row of areolar pores. Orifice with a semicircular anter, squared sinus and robust condyles devoid of denticulations. Peristome most developed proximally. Oral spines present. A single proximolateral, adventitious avicularium proximally directed, elliptical, slightly spatulate or rounded triangular. Ooecium globular, covered distally by secondary calcification, ectooecium perforated frontally by numerous small pores. Etymology. Named after the Indonesian island of Java, at present its unique geographical record. Description. Colony encrusting, multiserial, unilaminar. Ancestrula overgrown, presumably tatiform, surrounded by five zooids slightly smaller in size than succeeding autozooids. Autozooids distinct with deep interzooidal furrows containing salient lateral walls, arranged quincuncially, irregularly polygonal, longer than wide (mean L/W = 1.46). Frontal shield slightly convex, smooth, dimpled, bordered by a single row of large and numerous areolar pores, 25–35 µm in diameter. Orifice almost equidimensional if the sinus is included in the measure of its length, with a small squared sinus separated from the semicircular anter by a robust pair of condyles devoid of denticulations. Peristomial rim encircling the orifice, most developed proximally. An uncertain number of oral spine bases present, covered early in ontogeny by the development of the peristome. Adventitious avicularia dimorphic, proximolateral, suboral, unpaired, proximally directed, complete crossbar; most commonly elliptical parallel-sided or slightly spatulate, rarely triangular with rounded tip. Ooecium immersed, globular, broader than long, covered distally by secondary calcification, ectooecium perforated frontally by numerous (ca 30–40), small, circular to oval pores, 10–15 µm in maximum diameter. Remarks. A single colony of Pleurocodonellina javanensis n. sp. was found in our samples, encrusting a bivalve shell fragment. The Pleistocene species is similar in appearance to P. signata (Waters, 1889), recorded as having an almost circumtropical distribution but in need of further revision after the partial review of Tilbrook (2006). However, P. signata differs in having minutely denticulate condyles, a proportionally smaller drop-shaped sinus, elongate triangular avicularia, and much larger zooids. A Burdigalian species tentatively assigned to Pleurocodonellina was found in Kalimantan (Di Martino & Taylor 2015, p. 23), but differs in having much larger zooids and in the shape of the avicularia. N, Number of colonies and number of zooids measured; SD, standard deviation.Published as part of Martino, Emanuela Di & Taylor, Paul D., 2018, Early Pleistocene and Holocene bryozoans from Indonesia, pp. 1-70 in Zootaxa 4419 (1) on pages 29-30, DOI: 10.11646/zootaxa.4419.1.1, http://zenodo.org/record/376963
Grassi, De Martino e l'attualità dell'umanesimo
No full textNell'articolo discuto il nesso fra spirito europeo e senso storico proponendo un confronto teorico fra Ernesto Grassi ed Ernesto De Martino. Nel primo paragrafo ricostruirò la prospettiva da cui prende le mosse Grassi facendo emergere tre temi, fortemente connessi fra loro, che nei paragrafi successivi discuterò separatamente imbastendo un confronto con il modo in cui si declinano nella riflessione di De Martino: 1) la necessaria alleanza fra neoidealismo italiano e tradizione fenomenologica ed esistenzialista per sviluppare l’eredità di Hegel; 2) il primato da attribuire al pathos sul logos della ragione; 3) il ruolo di un approccio umanistico nello sviluppo di un’autocritica per riscattare il pensiero occidentale dalla crisi che lo investe a metà Novecento
Introduction
No full textThe cycles of perceived success and failure of the Italian cinema have meant that its historiography lends itself readily to chronological periodization. These cycles have been rationalized and contextualized according to a terminology of crisis and rebirth. On the one hand, periods populated with commercial or critical successes in cinema are posited as ‘anni d’oro’, such as the international fame of Italian divi in the 1910s, the new neorealist image in the 1940s, or the proliferation of modernist masterpieces in the 1960s. On the other, subsequent periods of dwindling audiences and tumbling profits are framed in dichotomic, eschatological terms: the major instance here is the current crisis of the cinema which appears to date back to the late 1960s. This article introduces a special issue of the journal Italian Studies that is devoted to a critical re-appraisal of these historical periods, using a variety of thematic approaches and referring to little considered genres of filmmaking
Misura di |Vcb| dal decadimento semileptonico B0->D* l nu
No full textA partire dal campione di 3 milioni di eventi adronici raccolti dal rivelatore DELPHI, e` stato determinato il rapporto delle larghezze parziali di decadimento Gamma(B0->D*- l+ nu)/Gamma(B->D*- pi+ l+ nu X) mediante l'identificazione degli eventi B->D*-l+nu e una selezione topologica dei decadimenti semileptonici (risonanti e non risonanti) del mesone B in una coppia pi+D*. E` stata misurata la frazione differenziale del decadimento B0->D*-l+ nu in funzione del momento trasferito al mesone D*-. Questa distribuzione e` stata quindi interpolata linearmente su tutto lo spettro di momento in modo da determinare la frazione parziale di decadimento BR(B0->D*-l+nu) e la costante di accoppiamento |Vcb|
A topological approach to the Fourier transform of an elementary D-module
No full textLet V be a complex affine line, and M a holonomic D-module on it. The Fourier-Laplace transform M^ of M is a holonomic D-module on the dual affine line V*. Even if M is regular, M^ is irregular in general. It is natural and important to try to describe the Stokes structure of M^ in terms of the Stokes structure of M. In the literature dealing with this problem, let us mention in particular the work by Malgrange, Mochizuki, Hien-Sabbah, D'Agnolo-Hien-Morando-Sabbah.
Malgrange gave a comprehensive treatment, Mochizuki has given a recipe for a complete description of the Fourier-Laplace transform of a general M using the rapid decay homology theory introduced by Bloch-Esnault.
For a particular kind of D-module, so-called elementary, Hien-Sabbah gave a more explicit description. Using the Riemann-Hilbert correspondence of Deligne-Malgrange, they introduced a topological local Laplace transformation at the level of Stokes-filtered local systems, and computed it in terms of Cech cohomology.
A different point of view to the study of the Stokes phenomena is given by the Riemann-Hilbert correspondence, as stated by D'Agnolo-Kashiwara.
This associates to a holonomic D-module the enhanced ind-sheaf of its enhanced solutions. Moreover, by functoriality, such correspondence interchanges Fourier-Laplace transform for holonomic D-modules with Fourier-Sato transform for enhanced ind-sheaves.
Using this point of view, D'Agnolo-Hien-Morando-Sabbah explicitly computed the Stokes structure of M^, for M regular holonomic.
In this thesis, using this same point of view, our aim is to get a description of the Fourier-Laplace transform of an elementary D-module. Unlike Hien-Sabbah, our approach is purely topological. Like D'Agnolo-Hien-Morando-Sabbah, it is based on computations in terms of Borel-Moore homology classes. For that, we choose the most natural classes, namely those attached to steepest descent cycles
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