119,697 research outputs found
Le feste anconitane nel settembre dell'anno MDCCCXLI per la faustissima venuta e dimora in Ancona di nostro signore Gregorio XVI, pontefice felicemente regnante /
No full textThe plates are lithographed by Gionantonj in Ancona (signed: Lit. Giovantonj in Ancona). Included are: frontispiece portrait of the pope (signed: F. Maggi); and 10 plates signed: "M. Bevilacqua Ing. inv., "L. Scarpetti dis", "F. Maggi dis.", "M. Badioli dis.", "Vin.zo Podesti dip.", "A. Bedetti dis.", "Ing. Pont. dis.", "L.B. dis. Lit."; "L.M. dis. Lit."; "G. C.te Bonarelli inv.", "M.B."; and "M. Livoni Ing. inv.".Includes description of fireworks.Mode of access: Internet
Decomposition of homogeneous vector fields of degree one and representation of the flow
No full textSummary:
The paper gives a decomposition theorem for the elements of the nonsemisimple Lie algebra of the vector fields on that are homogeneous of degree one with respect to a dilation Each is proved to be equal to with and linear semisimple. As a consequence, the author proves that "in absence of esonance" the vector field is equivalent to its linear part. Finally, the above results are applied to obtain a representation formula for the trajectories of a vector field and those of the affine control system with constant of minimum degree
On Kolmogorov entropy compactness estimates for scalar conservation laws without uniform convexity
No full textIn the case of scalar conservation laws u_t +f(u)_x = 0; t > 0; x in R, with uniformly strictly convex flux, quantitative compactness estimates-in terms of Kolmogorov entropy in L^1_{loc}- were established in [C. De Lellis and F. Golse, Comm. Pure Appl. Math., 58 (2005), pp. 989{998; F. Ancona, O. Glass, and K. T. Nguyen, Comm. Pure Appl. Math., 65 (2012), pp. 1303{1329] for sets of entropy weak solutions evaluated at a fixed time t > 0, whose initial data have a uniformly bounded support and vary in a bounded subset of L1. These estimates reflct the irreversibility features of entropy weak discontinuous solutions of these nonlinear equations. We provide here an extension of such estimates to the case of scalar conservation laws with a smooth flux function f that either is strictly (but not necessarily uniformly) convex or has a single inflection point with a polynomial degeneracy
Lipid-coated zinc oxide nanocrystals as innovative ROS-generators for photodynamic therapy
No full textPhotodynamic Therapy (PDT) is a medical treatment that combines the administration of a nontoxic drug, called photosensitizer (PS), with light irradiation of the targeted region. It has been proposed as a new cancer therapy, promising better selectivity and fewer side-effects compared to traditional chemo- and radio-therapies. PSs indeed can accumulate specifically within the region of interest so that when the light is directly focused only in that region the therapeutic effect is highly localized. Traditional PSs, like chlorins and porphyrins, suffer from several drawbacks such as aggregation in biological media and poor biocompatibility. Thus, the development of innovative photosensitizers able to overcome these issues is crucial to the therapeutic action of PDT. Among the others, nanostructured Zinc Oxide (ZnO) has been recently proposed as new therapeutic agent and PS thanks to its semiconducting properties, biocompatible features, and ease of functionalization [1]. Nevertheless, further efforts are needed in order to improve its colloidal stability in biological media and to unravel the effective therapeutic mechanism. Here, we propose the synthesis and characterization of lipid-coated ZnO nanoparticles as new photosensitizer for cancer PDT [2]. First, by Dynamic Light Scattering (DLS) experiments, we show that the lipid-coating increases the colloidal stability of the ZnO NPs in Phosphate buffered saline (PBS). Then, using Electron Paramagnetic Resonance (EPR) coupled with the spin-trapping technique, we demonstrate and characterize the ability of bare and lipid-coated ZnO NPs to generate Reactive Oxygen Species (ROS) in water only when remotely actuated via light irradiation. Interestingly, our results aware that the surface chemistry of the NPs greatly influence the type of photo-generated ROS. Finally, we show that our NPs are effectively internalized inside human epithelial carcinoma cells (HeLa) via a lysosomal pathway and that they are able to generate ROS inside cancer cells. [1] B. Dumontel, M. Canta, H. Engelke, A. Chiodoni, L. Racca, A. Ancona, T. Limongi, G. Canavese and V. Cauda, J. Mater. Chem. B. under revision. [2] A. Ancona, H. Engelke, N. Garino, B. Dumontel, W.Fazzini and V. Cauda, to be submitted. The support from ERC Starting Grant - Project N. 678151 "Trojananohorse" is gratefully acknowledged
Uniqueness and Stability of Solutions for Temple Class Systems with Boundary and Properties of the Attainable Sets
No full textSummary:
The authors consider the initial-boundary value problem for a strictly hyperbolic, genuinely nonlinear, Temple class system of conservation laws on the quarter t-x plane
where . For a class of initial and boundary data in with possibly unbounded variation, they construct a flow of solutions that depend continuously, in the distance, both on the initial data and on the boundary data. Moreover, we show that each trajectory of such flow provides the unique weak solution of the corresponding initial-boundary value problem that satisfies an entropy condition of Oleinik type.
Next, they study the initial-boundary value problem from the point of view of control theory, taking the initial data fixed and considering, in connection with a prescribed set of boundary data regarded as admissible controls, the set of attainable profiles at a fixed time and at a fixed point ,
establishing closure and compactness of such sets in the topolog..
On quantitative compactness estimates for hyperbolic conservation laws
No full textWe are concerned with the compactness in L^1_loc of the semigroup (St)_{t>0} of entropy weak solutions generated by hyperbolic conservation laws in one space dimension. This note provides a survey of recent results establishing upper and lower estimates for the Kolmogorov "-entropy of the image through the mapping S_t of bounded sets in L^1 \cap L^\infty, both in the case of scalar and of systems of conservation laws. As suggested by Lax [16], these quantitative compactness estimates could provide a measure of the order of "resolution" of the numerical methods implemented for these equations
Carta ittica della Provincia di Ancona.
No full textLo studio ha riguardato le popolazioni ittiche presenti nei corpi idrici ricadenti nel territorio della Provincia di Ancona. Il monitoraggio condotto ha preso in considerazione anche il controllo della qualità delle acque e le comunità di invertebrati presenti. Lo studio condotto ha consentito di formulare un giudizio sintetico e chiaro che svela le complesse interrelazioni tra l’ecosistema acquatico e le attività umane
Utilizzare la LIM per insegnare matematica: come, quando e perché?
No full textIn questo articolo si vuol riflettere sulle opportunità offerte
dall’utilizzo della LIM nell’insegnamento-apprendimento della
matematica, focalizzando l’attenzione sul ruolo del docente
e sulle competenze necessarie perché tali opportunità
possano essere sfruttate nel migliore dei modi. A tale scopo
risulta importante precisare in che termini un uso appropriato
della LIM possa essere funzionale a sviluppare e potenziare
negli studenti la costruzione di significati matematici
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