131,659 research outputs found
Fredholm properties and nonlinear Dirichlet problems for mixed type operators
No full textFor a class of linear partial differential operators of mixed elliptic-hyperbolic type with homogeneous Dirichlet data on the entire boundary of suitable planar domains, we exploit the recent
spectral theory of (Lupo-Monticelli-Payne, Comm. in Partial Differential Equations, to appear) to establish a Fredholm alternative for weak solutions of the linear Dirichlet problem. This alternative is then used to study nonlinear Dirichlet problems with at most asymptotically linear nonlinearities, both in resonant and nonresonant cases. In particular, we obtain solvability results in nonresonant situations, a nonlinear Fredholm alternative (in the spirit of Landesman and Lazer) valid in both nonresonant and strongly resonant situations and establish a multiplicity result valid in nonresonant and weakly resonant situations
Flussi di acqua e soluti attraverso n membrane in serie, con trasporto attivo
No full textTrasporto di acqua e soluti attraverso n membrane in serie in presenza di trasporto "attivo" di soluto. L'esperienza mostra che le relazioni fra i flussi di materia attraverso membrane, e le forze generalizzate che li sostengono sono non lineari. Ciò è vero sia per il trasporto attraverso singole membrane biologiche sia per quello attraverso barriere complesse, come gli epiteli, che si possono ritenere costituiti da più membrane semplici in serie. Il modello più semplice, ma poco realistico, costituito da due sole membrane, già consente di spiegare l'accoppiamento fra il trasporto "attivo" (accoppiato a reazioni chimiche) di soluto e il trasporto d'acqua (1-2). La generalizzazione a un sistema costituito da n membrane in serie, ma puramente passivo (3-4) viene ora estesa con l'introduzione del trasporto attivo. Lo studio teorico del modello e la simulazione al calcolatore di tale sistema hanno mostrato che: 1. la non linearità del flusso volumetrico si osserva solo in presenza di soluto e l'equazione si riduce alla legge lineare di Darcy per il solvente puro, 2. la non linearità richiede comunque l'asimmetria del sistema ed è dovuta all'accumulo di soluto nei compartimenti interni, 3. i coefficienti non costanti che correlano i flussi alle loro forze traenti sono funzione, oltre che del flusso stesso, anche delle variabili operative, 4. il comportamento non lineare di membrane semplici può venire spiegato con il fatto che gli strati limite di fluido non mescolato si comportano come membrane non selettive. (1) C. S. Patlack, D. A. Goldstein, J. F. Hoffman: J. Theor. Biol. 5, 426-442 (1963). (2) G. Monticelli, F. C. Celentano: Bull. Math. Biol. 45, 1073-1096 (1983). (3) F. C. Celentano, G. Monticelli: Atti VI Congresso SIBPA, Camogli, 1983, pp 6062. (4) F. C. Celentano, G. Monticelli in V. Capasso, E. Grosso, S. L. Paveri Fontana: Mathematics in Biology and Medicine, Springer Berlino, 1985, pp 293-299
PHENOMENOLOGY TODAY: A GOOD TRAVEL MATE FOR ANALYTIC PHILOSOPHY?
No full textOn the basis of a short summary of phenomenological aims and methods, this essay
describes the present state of relationships between phenomenology and analytic
philosophy, pointing out the progress done in the last years on the way of their
rapprochement, after a long time of reciprocal scorn and misunderstandings. In the way
of a presentation of the Phenomenology Lab and Center’s present and future research
program, it recalls some relevant chapters of past and present phenomenological
research in Europe, and quite particularly in Italy. After discussing some aspects
of contemporary debates in phenomenology and philosophy of mind, it attempts at
establishing a convergent line of argument toward the assessment of an anti-reductive
ontology of concreteness, or the life world
The Routledge Handbook of the History of Translation Studies
No full textThe Routledge Handbook of the History of Translation Studies is an exploration of the history of translation and interpreting studies (TIS) as a field of intellectual enquiry.
The volume covers the evolution of thinking on translation, from the earliest discourses in Assyria, Egypt, Israel, China, India, Greece, and Rome, up to the early 20th century when TIS emerged as an identifiable academic field. The volume also traces the institutionalization of TIS and its key concepts from their beginnings in the 1920s in Ukraine up to their contemporary interdisciplinary manifestations. Written by leading international scholars, many of whom played a direct role in the events they describe, the chapters in this volume provide a comprehensive and in-depth account of the birth and consolidation of translation and interpreting studies as a thriving interdiscipline.
With a focus on providing readers with the methodological and theoretical tools they need to conduct research, as well as background in the historiography of TIS, this handbook is an indispensable resource for all students and researchers of translation and interpreting studies
Translation and the History of European Communism
No full textThis chapter recounts the spread of Bolshevism, from a tiny faction of the Russian Social Democratic Workers’ Party into an empire of Soviet-dominated countries, focusing on translation and the way it was used to indoctrinate the citizens of diverse historical and cultural backgrounds. It also shows how, under the controlled culture of the USSR, translations (including samizdat publications) played a significant role in maintaining cultural values and beliefs that were shared before Marxism-Leninism became the mandatory ideology in the Eastern Bloc
Raphidrilus nemasoma Monticelli 1910
No full textRaphidrilus nemasoma Monticelli, 1910 a Figure 1 (A–D) Raphidrilus nemasoma Monticelli, 1910 a: p. 61–64. Raphidrilus nemasoma; Monticelli, 1910 b: p. 403–406, pls. 12–13; Banse, 1959 a: p. 307; possibly Banse, 1959 b: p. 170–171, fig. 2; possibly Bellan, 1964; not Harris, 1971: p. 706, fig. 14; Katzmann, 1972: p. 136; not Qian & Chia, 1989: p. 2350, figs. 1–18. Ctenodrilus branchiatus Sokolow, 1911 a: p. 548–565, plates XXVII–XXIX. Material examined. Croatia: Vrsar Harbor, northern Adriatic Sea, 45 °08,989ʹ N 13 ° 35,776 ʹ E, collected from the thallus of Caulerpa racemosa (Forsskål) J. Agardh, coll. Barbara Mikac, 08/ 12 / 2008 (9 anterior fragments mounted on stub, USNM 1150464). Description. Small and incomplete specimens, 1–2.5 mm long, 0.05–0.1 mm wide with 5–11 anterior chaetigers. First four chaetigers (thorax) wider than long; abdominal chaetigers twice longer than wide with sub–annulations. Prostomium short, broadly round; peristomium single achaetous annulation followed by one dorsally biannulated achaetous segment (Fig. 1 A, B). Parapodia with serrated capillaries throughout (Fig. 1 C, D). Anterior chaetigers with 4 serrated capillaries in each noto– and neuropodia; number of chaetae reduces from chaetiger 5–6 to 1– 2 serrated capillaries in posterior chaetigers. Distance between the insertion point of two capillary fibrils along the capillary chaetae approximately the same as the width of a single fibril (Fig. 1 C, D). Branchial filaments arising posterodorsal to notochaetae. Posterior end and pygidium not observed. Distribution. Raphidrilus nemasoma seems to be widely distributed in the Ligurian and Tyrrhenian seas (Castelli et al. 1995) and the northern Adriatic Sea. Remarks. The specimens analyzed from the northern Adriatic Sea agree well with the description of R. nemasoma by Monticelli (1910 a, b). Monticelli (1910 b) reported an achaetous segment before chaetiger 1, but referred to it as the peristomium; however, SEM analysis of R. nemasoma specimens newly collected showed an additional achaetous segment posterior to the peristomium. The dorsal distinction between prostomium and peristomium, however, is not easily seen using light microscopy, even at 1000 x magnification. The type series of R. nemasoma are believed to be lost or never kept (see discussion in Petersen & George 1991) but the specimens newly collected from the northern Adriatic Sea are not well enough preserved to be assigned as neotypes and were not collected near the type locality (Naples Gulf, Italy). More complete and well preserved specimens are necessary to better assess the external morphology of this species, even though detailed descriptions of the external morphology and internal anatomy are available in Monticelli (1910 b) and Sokolow (1911 a).Published as part of Magalhães, Wagner F., Bailey, Julie H., Brock, - & Davenport, Jennifer S., 2011, On the genus Raphidrilus Monticelli, 1910 (Polychaeta: Ctenodrilidae) with description of two new species, pp. 1-14 in Zootaxa 2804 on pages 4-5, DOI: 10.5281/zenodo.27706
Effects of annual changes in primary productivity and ocean indices on the breeding performance of tropical roseate terns in the western Indian Ocean
No full textWe assessed the influence of inter-annual changes in primary productivity and local, regional and large scale ocean indices on the breeding parameters of roseate terns S. dougallii on Aride Island, Seychelles, western Indian Ocean. Productivity (chicks/breeding pair), timing of breeding, clutch and egg sizes were monitored annually for 8 years and correlated with local ocean productivity (denoted by SeaWiFS estimates of chlorophyll concentration, CC), sea surface temperature and indices recording the status of the Indian Ocean Dipole and of El Niño. The rate of increase in CC (between mean laying date and CC peak value) was positively related to roseate tern productivity and mean clutch size over the 1998-2005 study period. Colony productivity seemed also to be influenced by the Multivariate El Niño Index. In most years, the breeding phenology of roseate terns corresponded to the local increase in CC around Aride, and failure to adjust timing of reproduction to the timing of the phytopankton bloom decreased the probability of breeding success. This is the first study showing that a tropical seabird species is sensitive to inter-annual variations in the intensity and timing of the phytoplankton bloom, which should be connected to annual variations in the availability of its main fish prey (juvenile goatfish). Overall, these patterns indicate that the reproduction of this top marine predator is dictated by the temporal variability in oceanographic conditions. We suggest that CC data available over the world’s oceans may be a useful tool to develop models predicting the fate of colonies of inshore feeding seabirds when other, more conventional monitoring methods cannot be used
Distance from submanifolds with boundary and applications to Poincaré inequalities and to elliptic and parabolic problems
No full textWe investigate regularity of the distance function from submanifolds with boundary of Rn. By exploiting these regularity results, we show a Poincaré inequality with matrix weights that degenerate along a submanifold with boundary. Furthermore, we prove uniqueness of solutions to elliptic and parabolic equations which degenerate on submanifolds with boundary
Storia de' fenomeni del Vesuvio avvenuti negli anni 1821, 1822 e parte de 1823 <dt.>
No full textTeodoro Monticelli e. N[icole] Covelli. A. d. Ital. übers. v. N. Nöggerath u. J. P. Paul
The Membrane Bending Modulus in Experiments and Simulations
No full textThe bending modulus is one of the most important material properties of lipid membranes, playing an important role in a number of biological processes including exo- and endocytosis, vesicle fusion, and the regulation of membrane protein activity. Different experimental techniques have been developed to estimate the bending modulus of simple lipid membranes, but unfortunately they provide different results for the same lipid membranes in very similar conditions. Similar issues have been found in simulations, where different methods (and different energetic models) provide different results. In this review, we collect results from both experiments and simulations, and discuss possible reasons for the discrepancies among different techniques
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