5,293 research outputs found
Fire prevention technical rule for gaseous hydrogen transport in pipelines
No full textThis paper presents the current results of the theoretical and experimental activity carried out by the Italian Working Group on the previous termhydrogennext termprevious termfirenext termprevious termpreventionnext term safety issues in the field of the previous termhydrogennext termprevious termtransportnext term in previous termpipelinesnext term [Grasso N, Ciannelli N, Pilo F, Carcassi M, Ceccherini F. previous termFirenext termprevious termpreventionnext termprevious termtechnicalnext termprevious termrulenext term for previous termgaseousnext termprevious termhydrogennext term refuelling stations. Proceedings of the International Conference on previous termHydrogennext term Safety, 8–10 September 2005, Pisa, Paper 420064]. From the theoretical point of view a draft document has been produced beginning from the Italian regulations in force on the natural gas previous termpipelinesnext term; these have been reviewed, corrected and integrated with instructions suitable to use with previous termhydrogennext term gas. From the experimental point of view a suitable apparatus has been designed and installed at the University of Pisa; this apparatus will allow simulations of previous termhydrogennext term releases from a previous termpipelinenext term with or without ignition of the previous termhydrogennext term–air mixture. The experimental data will help the completion of the above-mentioned draft document with the instructions about the safety distances. However, in the opinion of the Group, the work on the text contents is concluded and the document is ready to be discussed with the Italian stakeholders involved in the previous termhydrogennext term applications
Shock wave -- thermal inhomogeneity interactions: analysis and numerical simulations of sound generation
No full textI Notai poeti salentini: Giovanni Grasso e Giorgio di Gallipoli.
No full textGiovanni Grasso, imperial notary, βασιλικὸς γραμματικός and μαΐστωρ ἐπὶ τῶν δεήσων at the court of Frederick II, and Giorgio di Gallipoli, archivist (χαρτοφύλαξ) of the Church of Gallipoli, are best known as poets. They both came from a land, the Salento, which in the mid-12th and later in the 13th centuries was the last Hellenic-speaking cultural "frontier" for the Byzantine imperial tradition in the Mezzogiorno. The article aims to prove, on the "Greek" side, the link between poetry and the notarial function, which was a prominent feature at the court of Frederick II
Confronto fra suini “Casertana” e suoi derivati. III. Alcuni rilievi allo spolpo della carcassa
No full textLa presente ricerca è stata condotta su 143 suini (71 maschi e 72 femmine) appartenenti a 6 tipi genetici [Casertana (Ca), alcuni suoi derivati e Landrace x (Landrace x Large White)] e mattati a 3 differenti classi di peso vivo (80-90, 100-110 e 120-130 kg). I risultati più importanti hanno evidenziato che: (a) per tutti i tagli considerati, l’incidenza percentuale del grasso separabile + cotica è più elevata nella Ca e più bassa nel tipo genetico Landrace x (Landrace x Large White); (b) il tipo genetico influenza la percentuale di osso nel prosciutto di spalla che risulta inferiore nel tipo genetico Ca; (c) con l’aumentare dell’età alla mattazione, l’incidenza percentuale del grasso separabile + cotica aumenta (i) in tutti i tagli, passando dalla prima alla seconda classe di peso vivo, (ii) nei tagli ‘prosciutto di spalla’ e ‘prosciutto di coscia’, passando dalla seconda alla terza classe di peso vivo
Applicazione della video image analysis per la stima del contenuto di grasso del bauernspeck (speck dell'Alto Adige)
No full textE' stata utilizzata la tecnologia dell'analisi dell'immagine (Video Image Analysis, VIA) per la stima del contenuto di grasso di 125 campioni di Bauernspeck dell'Alto Adige (muscoli del dorso e grasso di copertura). Sui campioni è stata determinata la composizione centesimale e la VIA è stata impiegata per studiare le caratteristiche del grasso di copertura e delle aree del magro. I risultati hanno dimostrato l'esistenza di una correlazione positiva significativa fra VIA e contenuto di grasso se si consideravano il sesso dell'animale e il rapporto grasso/sezione. La VIA potrebbe risultare uno strumento utile in fase di controllo dei disciplinari di produzione. Inoltre, questa tecnica potrebbe essere utilizzata per la valutazione di alcune caratteristiche sensoriali legate al contenuto di grasso
Simultaneous management of renal carcinoma with caval vein thrombosis and double coronary artery disease
No full textIntroduction: Recent advances in surgical and anesthesiology techniques allow simultaneous thoracic and abdominal operations to be performed for severe heart disease and benignant or malignant abdominal diseases. Case report: The simultaneous surgical management in a 75-year-old patient suffering from severe double coronary artery disease and a renal cell carcinoma with extended intravascular growth into the inferior vena cava is reported. Conclusion: The postoperative course was uneventful. Simultaneous surgery proved to be beneficial and safe, showing optimal results in our patient
Gyrofluid simulations of collisionless reconnection in the presence of diamagnetic effects
No full textInternational audienceThe effects of the ion Larmor radius on magnetic reconnection are investigated by means of numerical simulations, with a Hamiltonian gyrofluid model. In the linear regime, it is found that ion diamagnetic effects decrease the growth rate of the dominant mode. Increasing ion temperature tends to make the magnetic islands propagate in the ion diamagnetic drift direction. In the nonlinear regime, diamagnetic effects reduce the final width of the island. Unlike the electron density, the guiding center density does not tend to distribute along separatrices and at high ion temperature, the electrostatic potential exhibits the superposition of a small scale structure, related to the electron density, and a large scale structure, related to the ion guiding-center density
Dal laboratorio alla clinica : recettori adrenergici e tessuti umani dell'apparato uro-genitale (Sessione Golden communications e video - Premi ASTELLAS)
No full text
Carrier transport mechanism in the SnO2:F/p-type a-Si:H heterojunction
No full textWe characterize SnO2:F/p-type a-Si:H/Mo structures by current-voltage (I-V) and capacitance-voltage (C-V) measurements at different temperatures to determine the transport mechanism in the SnO2:F/p-type a-Si:H heterojunction. The experimental I-V curves of these structures, almost symmetric
around the origin, are ohmic for |V| 0.1 V. The structure can be modeled as two diodes back to back connected so that the main current transport mechanisms are due to the reverse current of the diodes. To explain the measured C-V curves, the capacitance of the heterostructure is modeled as the series connection of the depletion capacitances of the two back to back connected SnO2:F/p-type a-Si:H and Mo/p-type a-Si:H junctions. We simulated the reverse I-V curves of the SnO2:F/p-type a-Si:H heterojunction at different
temperatures by using the simulation software SCAPS 2.9.03. In the model the main transport mechanism is generation of holes enhanced by tunneling by acceptor-type interface defects with a trap energy of 0.4 eV above the valence bandedge of the p-type a-Si:H layer and with a density of
4.0 10^13 cm^-2. By using I-V simulations and the proposed C-V model the built-in potential (Vbi) of the SnO2:F/p-type a-Si:H (0.16 V) and p-type a-Si:H/Mo (0.14 V) heterojunctions are extracted and a band diagram of the characterized structure is proposed
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