102,216 research outputs found
Gladiopycnodontidae, a new family of pycnodontiform fi shes from the Late Cretaceous of Lebanon, with the description of three genera
No full textThe osteology of Gladiopycnodus karami gen. et sp. nov., of Monocerichthys scheuchzeri gen. et sp. nov. and of Rostropycnodus gayeti gen. et sp. nov., three new fossil fishes from the marine Cenomanian (Late Cretaceous) of Lebanon, is studied in detail. Some of their cranial characters and the presence of a postcoelomic bone clearly refer these fishes to the order Pycnodontiformes. However, they differ from all other described Pycnodontiformes by two important characters. Their snout is elongated as a rostrum, formed by the enlarged prefrontal and the toothless premaxilla, with this premaxilla sutured by its upper margin to the lower margin of the prefrontal. Their pectoral fin is replaced by a strong spine articulated with the cleithrum. These two apomorphies justify the erection of a new family, the Gladiopycnodontidae. The skull of Monocerichthys scheuchzeri sp. nov. does not differ greatly from a classical pycnodontiform skull and this species seems to be the more primitive member of this new family. Gladiopycnodus karami gen. et sp. nov. and Rostropycnodus gayeti gen. et sp. nov. are much more specialized. They share some apomorphies not present in Monocerichthys scheuchzeri gen. et sp. nov., i. e., an extremely long rostrum and an elongated first anal pterygiophore that sustains with the postcoelomic bone a strong and long anal spine. Gladiopycnodontidae fam. nov. and Coccodontidae share a series of apomorphies that justify the erection of a new superfamily, Coccodontoidea, grouping these two families
Un frammento delle storie di Erodoto (I 59, 6-60; I 60, 4) in PCair JE 45623
No full textEdizione di un papiro del Museo Egizio del Cairo contenente un frammento del libro I delle "Storie" di Erodoto
Re-imagining democracy. How to create a shared political space
No full textIn this paper the role of emotions and imagination in politics is analyzed firstly,
(a) from a philosophical perspective with the help of Spinoza’s works and secondly,
(b) as a descriptor of recent social-political phenomena and public discourse within
real-existing democracies (REDs).
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In the first section, Spinoza’s political philosophy provides a definition of democracy
that has imagination as one of its fundamental defining elements. Thus, I show how according
to Spinoza imagination can sustain an emotive interaction among citizens and can orient them
towards the creation of a shared political space. Then, an interpretation of Spinoza’s political theory
as a third way beyond contractarian and contractualist theories is attempted, along with an analysis
of the notion of respublica and political equality in his works.
In the second section, the relation between politics and imagination is analyzed with the help
of sociological studies. Again, the philosophy of Spinoza is used as a theoretical framework:
I draw a comparison between the figure of the prophet, who has a “potentia vividius imaginandi”
(TTP II), and social/political movements of recent years. As a result, I argue that imagination
contributes to the development of a shared cum-afficiere, that is a collective interpretive system
of meaning
Letter, [Author unclear] to Paulina T. Merritt
No full textHandwritten letter to Paulina Merritt from an unknown author, October 1, 1876.
Soknopaiou Nesos 2004-2006
No full textPresentazione dei risultati più cospicui delle Campagne di Scavo condotte dal 2004 al 2006 dal Centro di Studi Papirologici nel sito di Soknopaiou Nesos (Fayyum, Egitto)
Per una ricostruzione del De Vitiis di Filodemo
No full textEsame del contenuto e delle caratteristiche bibliologiche di una serie di papiri riconducibili all'opera "I vizi e le contrapposte virtù" di Filodemo di Gadara, finalizzato alla ricomposizione del complesso dei libri dedicati, all'interno dell'opera, al vizio dell'adulazione
Brownian motion and diffusions
No full textMulti-skewed Brownian motion Bα = {Bαt: t ≥ 0} with skewness sequence α = {αk: k ∈ Z} and interface set S = {xk: k ∈ Z} is the solution to Xt = X0 + Bt + ∫R LX(t, x)dμ(x) with μ = ∑k∈Z(2αk - 1)δxk We assume that αk ∈ (0, 1)\{1/2} and that S has no accumulation points. The process Bα generalizes skew Brownian motion to the case of an infinite set of interfaces. Namely, the paths of Bα behave like Brownian motion in R\S, and on Bα0 = xk the probability of reaching xk + δ before xk - δ is αk, for any δ small enough, and k ∈ Z. In this paper, a thorough analysis of the structure of Bα is undertaken, including the characterization of its infinitesimal generator and conditions for recurrence and positive recurrence. The associated Dirichlet form is used to relate Bα to a diffusion process with piecewise constant diffusion coefficient. As an application, we compute the asymptotic behavior of a diffusion process corresponding to a parabolic partial differential equation in a two-dimensional periodic layered geometry
Chemical Vapor Deposited Graphene-Based Derivative As High-Performance Hole Transport Material for Organic Photovoltaics
No full textThe development of efficient charge transport layers is a key requirement for the fabrication of efficient and stable organic solar cells. A graphene-based derivative with planar resistivity exceeding 105 Ω/S and work function of 4.9 eV is here produced by finely tuning the parameters of the chemical vapor deposition process on copper. After the growth, the film is transferred to glass/indium tin oxide and used as hole transport layer in organic solar cells based on a PBDTTT-C-T:[70]PCBM blend. The cells attained a maximum power conversion efficiency of 5%, matching reference cells made with state-of-the-art PEDOT:PSS as the hole transport layer. Our results indicate that functionalized graphene could represent an effective alternative to PEDOT:PSS as hole transport/electron blocking layer in solution-processed organic photovoltaics. © 2016 American Chemical Society
Nuovi resti e osservazioni filogenetiche su Hippopotamus creutzburgi BOEKSCHOTEN & SONDAAR ( Hippopotamidae, Mammalia) del Pleistocene di Creta (Grecia). Geologica Romana, 21: 61-77.
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