1,846 research outputs found
Astrophysical jets: insight into long term hydrodynamics. Article and Supplementary Information
No full textAstrophysical jets are ubiquitous throughout the universe. They can be observed to emerge from protostellar objects, stellar x-ray binaries and supermassive black holes located at the center of active galaxies, and they are believed to originate from a central object that is surrounded by a magnetized accretion disc. With the motivations to understand whether hypersonic Newtonian jets produce any similarity to the morphologies observed in jets from young stellar objects (YSOs) and whether numerical codes, based on Godunov-type schemes, capture the basic physics of shocked flows, we have conceived a laboratory experiment and performed three-dimensional (3D) numerical simulations that reproduce the mid-to-long-term evolution of hypersonic jets. Here we show that these jets propagate, maintaining their collimation over long distances, in units of the jet initial radius. The jets studied are quasi-isentropic, are both lighter and heavier than the ambient and meet the two main scaling parameter requirements for proto-stellar jets: the ejection Mach number and the ambient/jet density ratio
Parameters for evaluating the cell-mediated immune response during viral infection: diagnostic and prognostic applications
No full textIndagini fenotipiche e funzionali sullo sviluppo dell’immunità neonatale nella specie suina.
No full textAn Overview of Epithelial-to-Mesenchymal Transition and Mesenchymal-to-Epithelial Transition in Canine Tumors: How Far Have We Come?
No full textHistorically, pre-clinical and clinical studies in human medicine have provided new insights, pushing forward the contemporary knowledge. The new results represented a motivation for investigators in specific fields of veterinary medicine, who addressed the same research topics from different perspectives in studies based on experimental and spontaneous animal disease models. The study of different pheno-genotypic contexts contributes to the confirmation of translational models of pathologic mechanisms. This review provides an overview of EMT and MET processes in both human and canine species. While human medicine rapidly advances, having a large amount of information available, veterinary medicine is not at the same level. This situation should provide motivation for the veterinary medicine research field, to apply the knowledge on humans to research in pets. By merging the knowledge of these two disciplines, better and faster results can be achieved, thus improving human and canine health
Il "nuovo" effetto fotoelettrico di Quirino Majorana
No full textSi discute, alla luce delle teorie moderne, il lavoro svolto da Ettore e Quirino Majorana su possibili nuovi aspetti dell'effetto fotoelettrico, non individuati dalla teoria di Einstein. Sulla base di argomenti qualitative, si suggerisce che, con buona probabilità, le misure effettuate da Quirino sull'effetto fotoelettrico dovuto a illuminazione periodica del campione, potrebbero essere interpretate dalla teoria di Einstein, con opportune modifiche dovute alla specifità dell'esperimento. In sostanza, come era già avvenuto per la Relatività, anche in questo caso Quirino sembra impiegare il proprio straordinario talento di sperimentatore nel tentativo di smentire una teoria che poi i suoi stessi esperimenti confermano. In questo caso, tuttavia, la questione non può dirsi completamente chiarita, né sul piano teorico, né su quello sperimentale. Si sottolinea l'illuminante chiarezza dell'intervento teorico di Ettore, puramente basato sulla fisica classica, peraltro
Commento agli artt. 117 e 118 al testo unico sugli appalti pubblici
No full textGli artt. 117 e 118 D.Lgs. 12 aprile 2006, n. 163 riguardano rispettivamente la disciplina della cessione dei crediti derivanti da contratti pubblici relativi a lavori, servizi e forniture, in attuazione delle direttive 2004/17/C.E. e 2004/18 C.E. e il divieto di cessione del contratto di appalto e il subappalto nella nozione accolta in tale norma e la disciplina pure in essa contenuta
Portrait of the Author in (Him/Her)self
No full textA fragment of a philosophical essay by Jean-Luc Nancy and Federico Ferrari titled Iconographie dell’auteur (Paris, 2005), published for the first time in Polish, that addresses the problem of a relationship between the image of the author and his/her work
Osservazioni sulla presenza e persistenza del virus della PRRS in tessuti diversi di suini nati da scrofe infettate sperimentalmente
No full textIntroduzione a: G. F. Cromaz Pagine goriziane. Liberal-nazionali e cattolici popolari italiani al Comune di Gorizia (1851-1914)
No full textThe author describes the activity of the communal administration in Gorizia from 1848 to 1918. He uses documents of the communal archive and of a former communal adviser, Luigi Faidutti, leader of christian-social party in the austrian Friuli. The essay gives an important place to discussion about the creation of a public water service
Securing XML documents with author-X
No full textAuthor-X is a Java-based system that addresses the security issues of access control and policy design for XML document administration. Author-X supports the specification of policies at varying granularity levels and the specification of user credentials as a way to enforce access control. Access control is available according to both push and pull document distribution policies, and document updates are distributed through a combination of hash functions and digital signature techniques. The Author-X approach to distributed updates allows a user to verify a document's integrity without contacting the document server
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