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265 results on '"Naso, V."'

15. Thermal design and experimental analysis of laser and electron beam hardening

Author

Festa, R., Nenci, F., Manca, O., and Naso, V.

Subjects
Laser beams -- Research, Electron beams -- Research, Engineering and manufacturing industries, Science and technology
Abstract

Dimensionless correlations for an easy prediction of the hardened depth in electron and laser beam heating treatments are derived from two analytical thermal models. Electron beam heat treating is carried out on 9Cr-2Mo and C40 steels. Effects of the translation speed and the spot dimensions were taken into account. The fairly good agreement between analytical and experimental data suggests that the proposed correlations can be used in applications.

Published
1993

18. Influence of the vehicle front shape inTeenage Cyclist-Vehicle Crash

Author

CAROLLO, Filippo, VIRZI' MARIOTTI, Gabriele, CANNIZZARO, Luigi, Naso, V, Carollo, F, Naso, V, Virzi' Mariotti, G, and Cannizzaro, L

Subjects
Settore ING-IND/14 - Progettazione Meccanica E Costruzione Di Macchine, Settore ING-IND/10 - Fisica Tecnica Industriale, teenage bicyclist, vehicle impact, bumper height, bonnet height, bonnet angle, Settore ING-IND/16 - Tecnologie E Sistemi Di Lavorazione
Abstract

In this work the data, obtained for the three vehicles (sedan, SUV and Pick Up), tested in previous works, are compared. Following the results found in the literature, particular emphasis is done on the speed of the teenager cyclist head at the instant of impact and the diagrams of the head speed and the chest obtained in the simulations are shown. The speed of the head is that absolute, and this is used for processing the data and the subsequent determination of the best values of the three geometric actual parameters identified in front of the vehicle. Absolute speed is preferred because using the relative speed respect to vehicle, some amounts that cannot be disregarded are omitted from the evaluation. The chosen speed is 30 km/h because higher values appear too dependent on the mass of the vehicle, while lower values may not result in serious injury and are therefore less attractive. The procedure, to obtain the optimal values of the height of the bumper, the height of the bonnet and of the inclination angle of the bonnet is illustrated in the case the side impact vehicle-teenager cyclist. The conclusion is made that analogous procedure can be applied to HIC values.

Published
2016

19. Teenage cyclist - Pick up crash by multibody simulation; HIC evaluation and comparison with previous results

Author

CAROLLO, Filippo, VIRZI' MARIOTTI, Gabriele, Naso, V, Carollo, F, Naso, V, and Virzi' Mariotti, G

Subjects
teenage bicyclist, Settore ING-IND/14 - Progettazione Meccanica E Costruzione Di Macchine, Settore ING-IND/10 - Fisica Tecnica Industriale, teenage bicyclist, Pick-up impact, severe (AIS4+) injury, HIC, biomechanics, Pick-up impact, HIC, biomechanics, severe (AIS4+) injury
Abstract

The study of the injury caused by Pick-up vehicle-teenage cyclist crash is presented in this paper. The vehicle has high frontal part, in order to compare the results with those obtained previously in the sedan and SUV - teenage cyclist crash. No variation is executed on the model of the teenage cyclist and the bike. Three different positions are analyzed: front, rear and lateral position. The injury on the cyclist head is examined by HIC criterion, in the way indicated in the rules. Correlation HIC – AIS is used to calculate the lethality of the injuries. A comparison is made between the results of the simulations for Pick up, SUV and sedan, concluding that the injury of the head is more dangerous for Pick-up impact than SUV and the sedan, but only at the maximum speed (50 km/h). This value of the speed can be considered critical, since HIC values are very high for all the three vehicles. The more dangerous injury is the side impact. A further comparison is done between the impact points of the three vehicles concluding that both the shape of the bonnet that the height of the front part must be studied carefully in order to reduce the damage to cyclists and pedestrians.

Published
2016

22. HIC evaluation in teenage cyclist – SUV accident

Author

CAROLLO, Filippo, VIRZI' MARIOTTI, Gabriele, Naso, V., Carollo, F, Virzì Mariotti, G, and Naso, V

Subjects
teenage bicyclist, Settore ING-IND/14 - Progettazione Meccanica E Costruzione Di Macchine, Settore ING-IND/09 - Sistemi Per L'Energia E L'Ambiente, sedan impact, teenage bicyclist, SUV impact, sedan impact, severe (AIS4+) injury, HIC, SUV impact, severe (AIS4+) injury, HIC
Abstract

The study of the crash between normal sedan and teenage cyclist was examined in previous paper, and is here continued analyzing the influence of the front part of the vehicle in the injury caused by the accident. The vehicle is a SUV, with high frontal part. No variation is executed on the model of the teenage cyclist and the bike. The position of the teenage cyclist regard to SUV is the same: three different positions are analyzed: front, rear and lateral position. The injury on the cyclist head is examined by HIC criterion, in the way indicated in the rules. Correlation HIC – AIS is used to calculate the lethality of the injuries. The work is arranged to calculate the damage to the chest by 3 ms criterion, which result is not yet ready. The principal conclusion is done that the injury of the head is more dangerous for the SUV impact than the sedan, but only to the maximum speed (50 km/h). A comparison is executed with the teenage pedestrian concluding that the pedestrian is subjected to greater injury, because the bike absorbs a part of the energy in the front and side crash. The more dangerous injury is the telescoping.

Published
2015

25. Italian Real Life Experience with Brentuximab Vedotin: Results of a National Observational Study on Relapsed/Refractory Anaplastic Large Cell Lymphoma

Author

Pellegrini, C, Rigacci, L, Patti, C, Gini, G, Mannina, D, Tani, M, Rusconi, C, Romano, A, Vanazzi, A, Botto, B, Carlo Stella, C, Gravetti, A., Gritti, G, Arcari, A, Tosi, P, Liberati, Anna Marina, Pinto, A, Pavone, V, Gherlinzoni, F, Naso, V, Volpetti, S, Visentin, A, Goldaniga, Mc, Bonfichi, M., De Renzo, A, Schiavotto, C, Spina, M, Storti, S, Carella, Am, Argnani, L., and Zinzani, Pl

Published
2016

27. DEVEC: A PHASE II STUDY OF METRONOMIC CHEMOTHERAPY IN ELDERLY NON-FIT PATIENTS WITH AGGRESSIVE B-CELL LYMPHOMAS (PROMOTED BY FIL)

Author

Cox, M.C., primary, Musuraca, G., additional, Arcari, A., additional, Fabbri, A., additional, Gini, G., additional, Tani, M., additional, Tucci, A., additional, Marcheselli, L., additional, Storti, S., additional, Di Landro, F., additional, Battistini, R., additional, Anticoli Borza, P., additional, Casaroli, I., additional, Zoli, V., additional, Fabbri, F., additional, Aroldi, A., additional, Naso, V., additional, Bianchi, M., additional, Borgo, E., additional, Ferranti, A., additional, Dondi, A., additional, Levis, A., additional, Tafuri, A., additional, and Merli, F., additional

Published
2017
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30. Allogeneic Transplant in Acute Myeloid Leukemia (AML) According to the Policy of the Rome Transplant Network (RTN): An Intention-to-Treat Analysis

Author

Arcese, W., Amadori, S., Cerretti, R., Cudillo, L., Angelis, G., Venditti, A., Buccisano, F., Cantonetti, M., Mangione, I., Andreani, M., Testi, M., Rapanotti, M. C., Fabritiis, P., Dentamaro, T., Cupelli, L., Tendas, A., Tirindelli, M. C., Annibali, O., Saltarelli, F., Mengarelli, A., Marchesi, F., Gumenyuk, S., Chierichini, A., Anaclerico, B., agostino tafuri, Montefusco, E., Ferrari, A., Naso, V., Di Piazza, F., and Picardi, A.

Published
2015

32. Numerical model for back treatment of multilayer thin films by a moving laser source

Author

Bianco, N., Oronzio Manca, Minea, A. A., Naso, V., Ricci, D., Bianco, Nicola, Manca, O., Minea, A. A., Naso, Vincenzo, Ricci, D., Bianco, N, Manca, Oronzio, Minea, A, and Naso, V

Subjects
Manufacturing, Laser source, Combined heat conduction and radiation
Abstract

A two-dimensional non stationary analysis of the conjugate optical-thermal fields induced in a multilayer thin film structure on a glass substrate by a moving Gaussian laser source is carried out numerically in order to study laser back treatment processes. The work-piece is considered semi-infinite along the motion direction and different thicknesses of the thin film are considered. Thermal and optical non-linearities are induced during transient heating, since the response of weakly absorbing thin films depends on temperature. The heat source impinges on the back surface of the glass substrate. The optical field is assumed to be locally one-dimensional and Maxwell equations are solved in order to evaluate the energy absorption in the thin films; the thermal field is assumed to be two-dimensional. COMSOL Multiphysics 3.4 code was employed to solve the conjugate thermal and electromagnetic problem Transient temperature profiles and temperature fields for different Peclet numbers and amorphous silicon thicknesses are presented.

Published
2010

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