323,066 research outputs found
A Unified Model for Stress-Driven Rearrangement Instabilities
No full textA variational model to simultaneously treat Stress-Driven Rearrangement Instabilities, such as boundary discontinuities, internal cracks, external filaments, edge delamination, wetting, and brittle fractures, is introduced. The model is characterized by an energy displaying both elastic and surface terms, and allows for a unified treatment of a wide range of settings, from epitaxially-strained thin films to crystalline cavities, and from capillarity problems to fracture models. The existence of minimizing configurations is established by adopting the direct method of the Calculus of Variations. The compactness of energy-equibounded sequences and energy lower semicontinuity are shown with respect to a proper selected topology in a class of admissible configurations that extends the classes previously considered in the literature. In particular, graph-like constraints previously considered for the setting of thin films and crystalline cavities are substituted by the more general assumption that the free crystalline interface is the boundary, consisting of an at most fixed finite number m of connected components, of sets of finite perimeter. Finally, it is shown that, as m tend to infinite, the energy of minimal admissible configurations tends to the minimum energy in the general class of configurations without the bound on the number of connected components for the free interface
Informe sobre fluoruración de la sal
No full textEn el año 2006, la Organización Mundial de la Salud, la Federación Dental Internacional y la Asociación Internacional para la Investigación Dental convocaron a 80 expertos de 30 países a una Consulta Global sobre la Salud Bucodental mediante el Fluoruro. Las recomendaciones plantearon, entre otras, la necesidad que los gobiernos y a otros organismos introduzcan legislación efectiva y los programas necesarios para asegurar el acceso al fluoruro para la salud dental en todos los países.Fil: Piovano, S. Universidad de Buenos Aires. Facultad de Odontología. Cátedra de Odontología Preventiva y Comunitaria. Buenos Aires, Argentina.Fil: Bordoni, N. Universidad de Buenos Aires. Facultad de Odontología. Cátedra de Odontología Preventiva y Comunitaria. Buenos Aires, Argentina
Factores y nivel de riesgo de las enfermedades producidas por el biofilm de placa: primera parte
No full textLas investigaciones de las dos últimas décadas indican que los paradigmas de diagnóstico y tratamiento de las enfermedades asociadas al biofilm de placa son significativamente diferentes y tienden a seguir los lineamientos de los preceptos del modelo médico. Los adelantos biológicos y epidemiológicos permiten identificar a los pacientes expuestos a alto riesgo, vulnerables a contraer una enfermedad. La evaluación de un solo factor no permite ponderar el riesgo, pero se pueden identificar un conjunto de factores indicativos de un mayor riesgo de enfermedad para un individuo determinado o grupo de personas. La importancia de aplicar la distribución de riesgo apunta a comprender que el éxito dependerá de las acciones previas referidas al manejo de caries dental y enfermedad gingivoperiodontal como enfermedades infecciosas multifactoriales. El objetivo de este trabajo fue analizar factores de riesgo para arribar al diagnóstico en Cariología y Periodoncia.Fil: Piovano, S. Universidad de Buenos Aires. Facultad de Odontología. Cátedra de Odontología Preventiva y Comunitaria. Buenos Aires, Argentina
Factores y nivel de riesgo de las enfermedades producidas por el biofilm de placa. Segunda parte: medidas preventivas
No full textLa incorporación de los preceptos del modelo médico y médico social aplicados a la atención odontológica ha permitido revisar los métodos de prevención y tratamiento de las enfermedades asociadas al biofilm de placa.\nEn los últimos 50 años se han puesto en marcha estrategias individuales y comunitarias de prevención de caries dental; el hallazgo más notable ha sido la fluoración de las aguas de abastecimiento y la incorporación de dentífricos fluorados.\nLas estrategias preventivas en cariología han resultado más eficaces cuando han sido aplicadas en forma combinada y se han desarrollado nuevas estrategias de tratamiento con el avance en el conocimiento de la etiología de las diferentes formas clínicas de Enfermedad Periodontal.\nFil: Piovano, S. Universidad de Buenos Aires. Facultad de Odontología. Cátedra de Odontología Preventiva y Comunitaria. Buenos Aires, Argentina
Reheating and dark radiation after fibre inflation
No full textWe study perturbative reheating at the end of fibre inflation where the inflaton is a closed string modulus with a Starobinsky-like potential. We first derive the spectral index n s and the tensor-to-scalar ratio r as a function of the number of efoldings and the parameter R which controls slow-roll breaking corrections. We then compute the inflaton couplings and decay rates into ultra-light bulk axions and visible sector fields on D7-branes wrapping the inflaton divisor. This leads to a reheating temperature of order 10 10 GeV which requires 52 efoldings. Ultra-light axions contribute to dark radiation even if Δ N eff is almost negligible in the generic case where the visible sector D7-stack supports a non-zero gauge flux. If the parameter R is chosen to be small enough, n s 0.965 is then in perfect agreement with current observations while r turns out to be of order r 0.007. If instead the flux on the inflaton divisor is turned off, Δ N eff 0.6 which, when used as a prior for Planck data, requires n s 0.99. After R is fixed to obtain such a value of n s , primordial gravity waves are larger since r 0.01
Vincent Desprez o. s. b., La Russia monastica, mille anni di storia. Con un saggio di Adalberto Piovano, benedettino, su Santità e monachesimo in Russia (Orizzonti monastici 37)
No full textVincent Desprez o. s. b., La Russia monastica, mille anni di storia. Con un saggio di Adalberto Piovano, benedettino, su Santità e monachesimo in Russia (Orizzonti monastici 37). In: Revue des études byzantines, tome 64-65, 2006-2007. p. 431
Effects of chemicals from longline baits on the biting behaviour of loggerhead sea turtles
No full textBiowaste management in Italy: Challenges and perspectives
No full textThe aim of this work is the development of a methodology for the technical and
environmental assessment of biowaste valorization in 2G biorefineries. Italy was chosen as case study,
considering years 2016–2017. Approach: the Italian context was evaluated through the following
key parameters: Gross domestic power, climate, demography, and population density distribution
described the Italian framework. The four most abundant biowaste categories were defined through
their amounts and geo-localization: wastewater and sewage sludge (WSS, 4.06 Mt/y), organic fraction
of municipal solid waste (OFMSW, 1.7 Mt/y), agricultural livestock waste (ALW, 5.7 Mt/y), and waste
deriving from the food industry (FIW, 2.6 Mt/y). The geo-localization and quantitative evaluations
of the available biowaste amounts were aimed at defining the dimension and localization of the
biorefinery plant and at optimizing supply and transport chains, while the qualitative characteristic
were aimed to evaluate the most promising process among thermo-valorization (TH) and anaerobic
digestion (AD). Results: All considered biowastes were appropriate for biorefinery processes, since
carbon content exceeds 40% and the carbon–nitrogen ratio was between 10 and 30. All biowaste
categories were evaluated as feedstocks for two biorefinery processes: anaerobic digestion (AD)
and thermo-valorization (TH) with energy recovery. Compared to TH, AD achieved in all cases the
best performances in terms of produced energy and avoided CO2 emissions. The primary energy
production of AD and TH for WSS, OFMSW, ALW, and FIW were respectively: 7.89 vs. 2.4 kWh/kg;
8.7 vs. 2.6 kWh/kg; 10.85 vs. 5.5 kWh/kg; and 12.5 vs. 7.8 kWh/kg. The main findings of this work
were: the adoption of AD was technically more suitable than TH; AD increased the avoided CO2
emissions of 10%–89.9% depending on biowaste category
Vita di Arlotto Mainardi piovano di S. Cresci a Maciuoli del signor Domenico Maria Manni. - Quarta edizione. Giuntovi un canto d'incerto autore intitolato La pazzia di Bettina veneziana
No full textVita di Arlotto Mainardi piovano di S. Cresci a Maciuoli del signor Domenico Maria Manni. - Quarta edizione. Giuntovi un canto d'incerto autore intitolato La pazzia di Bettina veneziana
In Venezia : nel negozio Zatta, 1763
64 p., [1] c. di tav. : ritr. ; 8°
Nell'antip. calcogr.: ritr. di Bettina Gabrieli (Presso A. Z.); sul front.: vignetta calcogr
Testatine e finalini xilogr
Segn.: A-D⁸
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