Search results for "Ady"
showing 10 items of 565 documents
On Infiltration and Infiltration Characteristic Times
2022
In his seminal paper on the solution of the infiltration equation, Philip (1969), https://doi.org/10.1016/b978-1-4831-9936-8.50010-6 proposed a gravity time, tgrav, to estimate practical convergence time and the time domain validity of his infinite time series expansion, TSE, for describing the transient state. The parameter tgrav refers to a point in time where infiltration is dominated equally by capillarity and gravity as derived from the first two (dominant) terms of the TSE. Evidence suggests that applicability of the truncated two-term equation of Philip has a time limit requiring higher-order TSE terms to better describe the infiltration process for times exceeding that limit. Since …
Evoluzione delle caratteristiche qualitative dei frutti di pesco lungo la filiera
2009
Characterization and development of different methods to extend shelf life of fresh cut fruit. Case study: novel controlled release system by layer-b…
2016
The research project aimed at the investigation of different methods for the storage of fresh-cut fruit. This case study relates to the proposal of an innovative controlled release system to improve the shelf life of ready-to-eat fruit. The methods applied during three research years included the application of active molecules from natural substances, some widely used in commerce and other tested for the first time; first analyzed in vitro and then applied in vivo. The under consideration methods concerned dipping, coating and the layer-by-layer assembly. The analysis carried out on the fruit have monitored pomological traits performances (soluble solids content, titratable acidity, pH, co…
Equilibrium/steady-state concept in phytoplankton ecology
2003
This paper summarises the outcomes of the 13th Workshop of the International Association of Phytoplankton Taxonomy and Ecology (IAP). The authors mostly addressed their contributions on the following topics: the effect of trophic state on the attainment of a steady-state; the establishment of equilibria in deep and shallow lakes; the role of spatial heterogeneity, disturbance, and stress in the establishment of equilibrium assemblages; the mechanisms leading to the steady state; the frequency and longevity of equilibrium phases, and the role of morphological and physiological plasticity of phytoplankton in maintaining the (apparently) same populations under different environmental condition…
Mathematical modelling of pressure oscillations in sewer pressurization
2008
SEWER PRESSURIZATION MODELLING BY A RIGID-COLUMN METHOD
2008
Mathematical modelling of pressurization transient by a rigid-column method is studied based on previous laboratory testing. Of course, such a method is not able to simulate the experimental intense pressure oscillations; however, it is considerably simpler than other feasible methods and more easily implementable within drainage network models. Starting from this operative point of view, the paper aims at recognizing “what” and “how much” of the transient can be simulated by a rigid-column method. Actually, better results were obtained than it was expected. The model proves to be successful in simulation of the filling pipe stage as well as the stabilization stage of flow to the final stea…
QUEL LABILE CONFINE TRA ARTE E DESIGN
2019
Il design è arte? Questa domanda, che molti si pongono e alla quale non pochi hanno cercato di rispondere in modo definitivo, costituisce il filo conduttore di questo breve libro nel quale si cerca di dare al lettore una traccia per orientarsi nel mondo dell’arte e del design, spesso insidioso e/o difficilmente comprensibile. La necessita di un ripensamento dell’opera e dei ruoli dell’artista e del critico che si adatti a una realtà in trasformazione e al centro del dibattito nell’ambiente intellettuale italiano fin dall’inizio degli anni ’60 del novecento. Questione nodale e quella di definire un’arte che, per cosi dire, si trova al di là della dimensione dell’artisticità, nella prospettiv…
UNA PIAZZA D’ACQUA E UN APPRODO TURISTICO A TRAPANI. Tesi di laurea di Bernardo Mauro di Giorgio – a.a. 1999-2000. Relatore prof. Marcello Panzarella
2012
E' illustrato il progetto di una "piazza d'acqua" a Trapani, redatto per una tesi di laurea. Il progetto dispone dei pezzi ready made, tratti dalla storia recente dell'architettura internazionale, a formare un sistema spaziale nuovo e differente
Palermo si cura. Pratiche culturali di mutuo soccorso come risposta alle fragilità della città (post)pandemica
2023
In un quadro di riferimento in cui la crisi è globalizzata ma diseguale e in mancanza di un sistema di welfare capace di rispondere alle urgenze dei contesti e dei gruppi sociali più marginalizzati, una risposta ai nuovi bisogni sociali ed individuali è stata offerta da reti solidali e da pratiche di mobilitazione dal basso che svolgono un ruolo di agency territoriale, spesso indipendentemente o in assenza di Istituzioni. Nel contesto palermitano un impegno agito da una pluralità di soggetti culturali già attivi sul territorio, riuniti in un’assemblea pubblica (Palermo si cura), durante il periodo del primo lockdown hanno dato vita ad azioni di mutuo soccorso per rispondere all’emergenza ec…
Propellant non-steady burning effects on controllable solid rocket motor internal ballistics
2009
An analysis of the unsteady non-linear behavior of the controllable solid propellant rocket motor (CSRM) consequent to rapid and relevant nozzle operation is presented. The study includes a development of a non-linear unsteady combustion model able to handle relevant and rapid chamber pressure changes typical of CSRMs. The CSRM nonlinear unsteady model is implemented according to a main solver - sub models architecture and uses different time scales. The formulation of the combustion gas mass flow rate is developed considering the propellant density, the unsteady combustion, the regression of the combustion surface and the outflow through the variable nozzle. The grain surface involved in t…