1,727,676 research outputs found
Caricaturisti e caricaturati al caffè Michelangiolo : ricordi illustrati da 48 caricature tolte dai vecchi originali del tempo / Telemaco Signorini
Get PDFCaricaturisti e caricaturati al caffè Michelangiolo : ricordi illustrati da 48 caricature tolte dai vecchi originali del tempo / Telemaco Signorini
Firenze : Civelli, 189
Numerical analysis of a transmission problem with Signorini contact using mixed-FEM and BEM
Get PDF© EDP Sciences, SMAI 2011This paper is concerned with the dual formulation of the interface problem consisting of a linear partial differential equation with variable coefficients in some bounded Lipschitz domain Ω in
Rn (n ≥ 2) and the Laplace equation with some radiation condition in the unbounded exterior domain Ωc := Rn\￣Ω. The two problems are coupled by transmission and Signorini contact conditions on the interface Γ = ∂Ω. The exterior part of the interface problem is rewritten using a Neumann to Dirichlet mapping (NtD) given in terms of boundary integral operators. The resulting variational formulation becomes a variational inequality with a linear operator. Then we treat the corresponding numerical scheme and discuss an approximation of the NtD mapping with an appropriate discretization of the inverse Poincar´e-Steklov operator. In particular, assuming some abstract approximation properties and a discrete inf-sup condition, we show unique solvability of the discrete scheme and obtain the corresponding a-priori error estimate. Next, we prove that these assumptions are satisfied with Raviart- Thomas elements and piecewise constants in Ω, and continuous piecewise linear functions on Γ. We suggest a solver based on a modified Uzawa algorithm and show convergence. Finally we present some numerical results illustrating our theory
The Emerging Science of Homeopathy. Complexity, biodynamics, and nanopharmacology
No full textIn this updated reissue of their 1995 classic Homeopathy: A Frontier in Medical Science, Italian physicians Paolo Bellavite and Andrea Signorini thoroughly examine previous and current literature on the science of homeopathy in order to discover answers to the elemental questions: does it work? and if so, how does it work? The authors build a theory of the Law of Similars by comparing homeopathy to the use of drugs, that, according to traditional views are considered to be harmful on specific healthy systems, to actually treat and cure disease in the long term. They offer a careful description of the inverse effects of drugs and paradoxical phenomena of cells, including receptors, transduction, and complexity of homeostatic networks in the inflammatory process. Tackling the problem of the nanopharmacological doses of homeopathy (high potencies, in homeopathic parlance) Bellavite and Signorini engage in a fascinating discussion of the biophysics of water, biological effects of electromagnetic fields, chaos theory, and fractals. In doing so, they offer a compelling argument for homeopathy’ inclusion in the world of mainstream medicine and science.
If you want to know about the science behind homeopathy, this book is a MUST! Written by a professor of pathology, this book reviews laboratory and clinical research, and it describes the implications of new physics (chaos and complexity theories as well as fractals and the biophysics of water) on homeopathy.
Main points of interest:
§ Up-to date literature review of clinical and experimental evidence of homeopathy
§ Working model of the biological basis of the “similia principle”
§ Hypotheses of the action mecanism of high dilutions/potencies of natural medicines
§ Relation of homeopathic concepts with recent advances in dynamic systems theory (chaos and complexity
La società di mutuo soccorso fra gli operai e operaie di Arezzo : cenni storico-statistici / Carlo Signorini
Get PDFLa società di mutuo soccorso fra gli operai e operaie di Arezzo : cenni storico-statistici / Carlo Signorini
Milano :_ Tip. Civelli, 1885
16 p. ; 24 cm
Estr. da: Rivista di beneficenza pubblica e delle istituzioni di previdenza, a. 13., fasc. ottobre 1885
Boundary augmented Lagrangian method for the Signorini problem
Get PDFsummary:An augmented Lagrangian method, based on boundary variational formulations and fixed point method, is designed and analyzed for the Signorini problem of the Laplacian. Using the equivalence between Signorini boundary conditions and a fixed-point problem, we develop a new iterative algorithm that formulates the Signorini problem as a sequence of corresponding variational equations with the Steklov-Poincaré operator. Both theoretical results and numerical experiments show that the method presented is efficient
Italo Signorini
No full textL'articolo è un breve necrologio di Italo Signorini, fondatore della Missione Etnologica Italiana in Messico ed esimio etnologo messicanista, in cui si mettono in evidenza i principali contributi scientifici da lui realizzati per la conoscenza delle popolazioni dei Huave di Oaxaca e dei Nahua della Sierra di Puebla.The article is a brief obituary of Italo Signorini, founder of the Italian Ethnological Mission in Mexico and eminent ethnologist messicanista, which highlight the major scientific contributions he made to the knowledge of the people of Oaxaca Huave and Nahua of the Sierra Puebla
Signorini conditions for inviscid fluids
Get PDFIn this thesis, we present a new type of boundary condition for the simulation of inviscid fluids – the Signorini boundary condition. The new condition models the non-sticky contact of a fluid with other fluids or solids. Euler equations with Signorini boundary conditions are analyzed using variational inequalities. We derived the weak form of the PDEs, as well as an equivalent optimization based formulation. We proposed a finite element method to numerically solve the Signorini problems. Our method is based on a staggered grid and a level set representation of the fluid surfaces, which may be plugged into an existing fluid solver. We implemented our algorithm and tested it with some 2D fluid simulations. Our results show that the Signorini boundary cpndition successfully models some interesting contact behavior of fluids, such as the hydrophobic contact and the non-coalescence phenomenon
Telemaco Signorini: spokesman of the Macchiaioli
Get PDFTelemaco Signorini was a member of a nineteenth-century Italian group of artists called the Macchiaioli. He was the son of Giovanni Signorini, a painter. The group came together against the Italian academies and drew inspiration from Decamps and the artists of the Barbizon school in France. Their style emphasizes effect and emotion. The Macchiaioli were a short lived group that only lasted from 1855 to 1862. Signorini and the members of the group participated in 1859 in the Risorgimento, the Italian struggle for independence. Based on this experience Signorini created several canvases depicting the Italian countryside, especially at La Spezia. He was also devoted to literature and in his essays he defended the Macchiaioli on several occasions. After the Macchia had been declared dead by Signorini, he traveled extensively to London and Paris. During these travels, Signorini succumbed to the popular influences of photography and Japanese prints. He began to travel in Italy exclusively beginning in 1884 and continued painting, using a mix of inspirations he had gathered throughout his life, until his death in 1901. This thesis is a comprehensive study of Signorini
Dataset: CutFEM/Signorini
No full text<p>Dataset used in CutFEM Signorini paper: <a href="https://arxiv.org/abs/1805.01925">arXiv:1805.01925</a></p>
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