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38 results on '"Vedova, A. D."'

3. The thermal control system of NASA’s Curiosity rover: a case study

Author

Quattrocchi, Gaetano, Pittari, Andrea, Dalla Vedova, Matteo D. L., and Maggiore, Paolo

Subjects
aerospace, Curiosity, NASA, thermal control system, rover
Abstract

In any space mission, maintaining subsystems temperature within the allowed limits is a difficult challenge. Parts exposed to the Sun need to be cooled because temperatures rise extremely high, while parts not directly exposed to the Sun need to be heated, because temperatures can drop dramatically. The vacuum does not conduct heat, so the only way to transfer energy is through electromagnetic radiation, generated by the thermal motion of particles in matter. Operating on a planet surface allow convective dissipation and, to a lesser extent, conductive heat dissipation. Furthermore, Mars’ thin atmosphere mitigates the strong temperature gradients that would occur in a vacuum. Nevertheless, external parts of the rover are exposed to temperature ranging between – 123°C - +40°C. In this paper, the thermal control system of NASA’s Curiosity rover will be presented, analyzing the challenges of maintaining suitable operating conditions in Martian environment and the solutions adopted to allow safe operations.

Published
2022

4. Digital twins for prognostics of electro-hydraulic actuators: novel simplified fluid dynamic models for aerospace valves

Author

Berri, Pier Carlo, Vedova, Matteo D. L. Dalla, and Santaera, Simone

Subjects
Aerospace systems, EHA, Digital twin, Flight commands, Lumped parameters, Monitoring, Non-linear modelling, Servovalve, Simplified fluid dynamic numerical models, EHA, Digital twin
Abstract

In the design and development phases of electro-hydraulic actuators (EHAs) used for aircraft flight controls, it is often necessary to carry out accurate and high-fidelity fluid dynamics simulations to evaluate the system behaviour within its entire operating range and, if necessary, investigate its most critical issues. These high-fidelity simulations (nowadays achievable with different techniques and commercial software) generally become pretty expensive from a computational perspective. Therefore, especially in the preliminary design phases or implementing system health monitoring algorithms (in real-time), the need to adopt simplified models emerges definitely (albeit capable of guaranteeing the appropriate level of detail and accuracy). These simplified models are also essential for developing effective and reliable model-based prognostic strategies capable of performing early health assessments of EHA valves. This work proposes a new lumped-parameters simplified numerical model, which, despite having a very compact formulation and reduced computational costs, simulates the internal fluid dynamics of the valve, overcoming some critical issues typical of other models available in the literature. It evaluates valve performance as a function of spool position and environmental conditions (e.g. supply pressure), better-assessing flow rate feedback, internal leakages, and other operating conditions (e.g. spool fine adjustment, pressure supply variable, overpressure, or water hammer). The performance of this numerical model is evaluated comparing with other simplified models published in the literature. Moreover, it is validated with a high-fidelity digital twin that simulates the behaviour of the valve, taking into account the geometry of the spool, the properties of the hydraulic fluid, and the local internal fluid-dynamics (laminar or turbulent regime, cavitation, etc.).

Published
2022

9. New synthetic fluid dynamic model for aerospace four-ways servovalve

Author

Dalla Vedova, Matteo D. L., Berri, PIER CARLO, Corsi, Cosimo, and Parid, Alimhillaj

Subjects
EHA, Lumped parameters, Servovalve, EHA, Fluid dynamic numerical model, Lumped parameters, Non-linear numerical model, Servovalve, Non-linear numerical model, Fluid dynamic numerical model
Published
2019

10. DIAGNOSTICS OF ACTUATION SYSTEMS FAULTS FROM DYNAMIC DATA

Author

Berri, PIER CARLO, Dalla Vedova, Matteo D. L., and Mainini, Laura

Subjects
Proper Orthogonal Decomposition, Reduced-Order Model, Proper Orthogonal Decomposition, Self-Organizing Maps, Dynamic Data, Actuator Diagnostics, Reduced-Order Model, Actuator Diagnostics, Dynamic Data, Self-Organizing Maps
Published
2018

13. Proposal of a model based fault identification neural technique for more-electric aircraft flight control EM actuators

Author

Dalla Vedova, M. D. L., Maggiore, P., Pace, L., and Romeo, Simone

Subjects
Artificial Neural Network (ANN), Fault Detection/Identification Algorithm, BLDC Motor Failures, Artificial Neural Network (ANN), Electromechanical Actuator (EMA), BLDC Motor Failures, Fault Detection/Identification Algorithm, Prognostics, Prognostics, Electromechanical Actuator (EMA)
Published
2016

15. Oral bisphosphonates do not increase the risk of severe upper gastrointestinal complications: a nested case–control study

Author

Ghirardi, Arianna, Scotti, Lorenza, Vedova, Gianluca D., D'Oro, Luca C., Lapi, Francesco, Cipriani, Francesco, Caputi, Achille P., Vaccheri, Alberto, Gregori, Dario, Gesuita, Rosaria, Vestri, Annarita, Staniscia, Tommaso, Mazzaglia, Giampiero, Corrao, Giovanni, Sessa, E., Arcoraci, V., Parodi, A., Zambon, A., Montanaro, N., Piccinni, C., Suzzi, C., Puccini, A., Sturkenboom, M., Geppetti, P., Sati, L., Di Bari, M., Forlan, F., Carle, F., Menna, A., Valenti, M., Ghirardi A, Scotti L, Vedova GD, D'Oro LC, Lapi F, Cipriani F, Caputi AP, Vaccheri A, Gregori D, Gesuita R, Vestri A, Staniscia T, Mazzaglia G, Corrao G, AIFA-BEST Investigators, Ghirardi, A, Scotti, L, DELLA VEDOVA, G, D'Oro, L, Lapi, F, Cipriani, F, Caputi, A, Vaccheri, A, Gregori, D, Gesuita, R, Vestri, A, Staniscia, T, Mazzaglia, G, Corrao, G, AIFA BEST, I, and Medical Informatics

Subjects
Male, Gastrointestinal Diseases, Administration, Oral, Comorbidity, Risk Factors, 80 and over, Secondary Prevention, Drug safety, Aged, 80 and over, Bone Density Conservation Agents, Diphosphonates, Incidence, Incidence (epidemiology), Gastroenterology, Bisphosphonates, General Medicine, Middle Aged, Calcium Channel Blockers, Italy, Administration, Cohort, Upper gastrointestinal complications, Nested case-control, Female, Research Article, Oral, Healthcare utilization database, medicine.medical_specialty, Database, Fracture prevention, Internal medicine, medicine, Humans, Bisphosphonate, MED/01 - STATISTICA MEDICA, Aged, business.industry, Case-control study, Case-Control Studies, Hydroxymethylglutaryl-CoA Reductase Inhibitors, Osteoporotic Fractures, Odds ratio, medicine.disease, Confidence interval, Surgery, Regimen, Nested case-control study, Bisphosphonates, Drug safety, Healthcare utilization database, Upper gastrointestinal complications, Osteoporosis, healthcare utilization database, upper gastrointestinal complications, drug safety, bisphosphonates, business
Abstract

Background Data on the effect of oral bisphosphonates (BPs) on risk of upper gastrointestinal complications (UGIC) are conflicting. We conducted a large population-based study from a network of Italian healthcare utilization databases aimed to assess the UGIC risk associated with use of BPs in the setting of secondary prevention of osteoporotic fractures. Methods A nested case–control study was carried out within a cohort of 68,970 patients aged 45 years or older, who have been hospitalized for osteoporotic fracture from 2003 until 2005. Cases were the 804 patients who experienced hospitalization for UGIC until 2007. Up to 20 controls were randomly selected for each case. Conditional logistic regression model was used to estimate odds ratio (OR) associated with current and past use of BPs (i.e. for drug dispensation within 30 days and over 31 days prior the outcome onset, respectively) after adjusting for several covariates. Results Compared with patients who did not use BPs, current and past users had OR (and 95% confidence interval) of 0.86 (0.60 to 1.22) and 1.07 (0.80 to 1.44) respectively. There was no difference in the ORs estimated according with BPs type (alendronate or risedronate) and regimen (daily or weekly), nor with co-therapies and comorbidities. Conclusions Further evidence that BPs dispensed for secondary prevention of osteoporotic fractures are not associated with increased risk of severe gastrointestinal complications is supplied from this study. Further research is required to clarify the role BPs and other drugs of co-medication in inducing UGIC.

Published
2014

17. Experimental study of neutron-rich nuclei near the N = 82 closed shell using the 96Zr+124Sn reaction with GASP and PRISMA-CLARA arrays

Author

Rodríguez, W., Torres, D. A., Cristancho, F., Medina, N. H., Chapman, R., Smith, J. F., Mengoni, Daniele, Truesdale, V., Grocutt, L., Mulholland, K., Kumar, V., Hadinia, B., Labiche, M., Liang, X., O'Donell, D., Ollier, J., Orlandi, R., Spohr, K. M., Wady, P., Wang, Z. M., Gadea, A., C. A., Ur, Lenzi, SILVIA MONICA, Capponi, L., Michelagnoli, Caterina, Bazzacco, D., Beghini, S., Mărginean, R., Mengoni, D., Montagnoli, Giovanna, Recchia, Francesco, Scarlassara, Fernando, Lunardi, Santo, Kröll, T., Napoli, D. R., Corradi, L., Fioretto, E., de Angelis, G., Mărginean, N., Sahin, E., Stefanini, A. M., Valiente Dobon, J. J., Vedova, F. D., Axiotis, M., Martinez, T., Szilner, S., Freeman, S. J., Smith, A. G., Jones, G., Thompson, N., and Pollarolo, G.

Published
2014

20. Probing the nature of particle-core couplings in (49)Ca with gamma spectroscopy and heavy-ion transfer reactions RID G-1784-2011

Author

Montanari, D., Leoni, S., Mengoni, D., Benzoni, G., Blasi, N., Bocchi, G., Bortignon, P. F., Bracco, A., Camera, F., Colo, G., Corsi, A., F. C. L., Million, B., Nicolini, R., Wieland, O., Valiente Dobon, J. J., Corradi, L., Angelis, G. d., Vedova, F. D., Fioretto, E., Gadea, A., Napoli, D. R., Orlandi, R., Recchia, F., Sahin, E., Silvestri, R., Stefanini, A. M., Singh, R. P., Szilner, S., Bazzacco, D., Farnea, E., Menegazzo, R., Gottardo, A., Lenzi, S. M., Lunardi, S., Montagnoli, G., Scarlassara, F., Ur, C., Bianco, G. L., Zucchiatti, A., Kmiecik, M., Maj, A., Meczynski, W., Dewald, A., Pissulla, T., and Pollarolo, Giovanni

Published
2011

23. Population of neutron-rich nuclei around 48ca with deep inelastic collisions

Author

Montanari, D., Leoni, S., Benzoni, G., Blasi, N., Bracco, A., Brambilla, S., Camera, F., Corsi, A., Crespi, F. C. L., Million, B., Nicolini, R., Wieland, O., Corradi, L., Angelis, G., Vedova, F. D., Fioretto, E., Gadea, A., Guiot, B., Napoli, D. R., Orlandi, R., Recchia, F., Silvestri, R., Stefanini, A. M., Singh, R. P., Szilner, S., Valiente-Dobón, J. J., Bazzacco, D., Farnea, E., Lenzi, S. M., Lunardi, S., Mason, P., Mengoni, D., Montagnoli, G., Fernando Scarlassara, Ur, C., Lo Bianco, G., Zucchiatti, A., Kmiecik, M., Maj, A., Meczynski, W., and Pollarolo, G.

Subjects
Neutron-rich nuclei, Reacción Inelástica, UNESCO::FÍSICA, UNESCO::FÍSICA::Nucleónica::Física de partículas, Inelastic collision, Neutron-rich nuclei, Reaction products, Semiclassical model, Transfer channel, Angular distribution, Calcium, Reaction products, Canales de transmisión, Semiclassical model, CLARA–PRISMA, Distribuciones angulares, Secciones cruzadas, Modelo semiclásico, Muy corta vida, Inelastic collision, deep inelastic reaction, semiclassical model, closed shell nuceli, FÍSICA [UNESCO], FÍSICA::Nucleónica::Física de partículas [UNESCO], Transfer channel
Abstract

The deep inelastic reaction 48Ca+64Ni at 6 MeV/A has been studied using the CLARA–PRISMA setup. Angular distributions for pure elastic scattering and total cross-sections of the most relevant transfer channels have been measured. The experimental results are compared with predictions from a semiclassical model, showing good agreement for the presently analyzed few neutrons transfer channels. The decay of the most intense reaction products has also been studied, giving indications of the population of states with very short lifetimes. Gadea Raga, Andrés, Gadea.Andres@ific.uv.es

Published
2009

24. Collisionally induced fragmentation of [M-H](-) species of resveratrol and piceatannol investigated by deuterium labelling and accurate mass measurements

Author

Stella, L., De Rosso, M., Panighel, A., Vedova, A. D., Flamini, R., and Traldi, P.

Abstract

Resveratrol (3,5,4'-trihydroxystilbene) and piceatannol (3,4,3',5'-tetrahydroxy-trans-stilbene) are phytoalexins present in red grapes and wines. In vitro studies have revealed that piceatannol blocks LMP2A, a viral protein-tyrosine kinase implicated in leukemia, non-Hodgkin's lymphoma and other diseases associated with the Epstein-Barr virus, and has an antimelanoma effect on human melanoma cells. Resveratrol has several beneficial effects on human health, such as anticancer, cardioprotection, antioxidant, inhibition of platelet aggregation and anti-inflammatory activity. In this investigation, the collisional behaviour of deprotonated resveratrol and piceatannol obtained under electrospray conditions is described. The mechanisms involved in the fragmentation pattern of [M-H](-) species of the two compounds were investigated by performing MSn experiments, deuterium labelling and accurate mass measurements. Copyright (C) 2008 John Wiley & Sons, Ltd.

Published
2008

27. Long-term simulations to assess the effects of drag and solar sails on the space debris environment

Author

Colombo, C., Rossi, A., Francesconi, A., Vedova, F. D., Gonzalo, J. L., Vitali Braun, Virgili, B. B., and Krag, H.

Subjects
Space debris, Solar sail, Drag sail, Long term simulations
Abstract

This paper is focused on the long-term simulation part of a study, funded by the European Space Agency, aimed at assessing the net effect of using sails for passive deorbiting at the end of life on the future debris population around the Earth. The aim of the "environmental feedback" task of the study was to perform simulations on the overall debris population considering the cases in which solar and drag sails are used for deorbiting. This is done in three steps, first the requirements in terms of sail area for deorbiting in a desired time are found, and then these requirements are compared with the current capabilities of sail technology. As a third step the revised sail area, considering technological constraints, are used for each spacecraft employing a sail in the debris simulation in SDM. The paper discusses the results of the long-term simulations.

29. Drag and solar sail deorbiting: Re-entry time versus cumulative collision probability

Author

Colombo, C., Alessandro Rossi, Vedova, F. D., Braun, V., Bastidavirgili, B., and Krag, H.

Subjects
Physics::Space Physics, Space debris, solar sail, drag sail, Astrophysics::Earth and Planetary Astrophysics, Quantitative Biology::Other
Abstract

Solar and drag sailing have been proposed as passive end-of-life deorbiting methods, and technological demonstrators are under development. For orbit above 800 km altitude solar radiation pressure can be exploited for increasing the orbit eccentricity until the perigee enters the drag region until final re-entry. The performance of the sailing strategy is determined by four parameters: the required effective area-to-mass ratio to deorbit the spacecraft, which determine the sail size given the satellite's mass, the time to deorbit and the augmented collision probability caused on and by the sail through its passage in the Low Earth Orbit protected region densely populated by space debris. In this paper we assess the sail dimension with respect to the augmented collision risk depending on the sail area and the deorbiting time.

31. High-spin states in the neutron-rich A similar to 100 region

Author

Torres, D. A., Chapman, R., Spohr, K. -M, Smith, J. F., Kumar, V., Hodsdon, A., Liang, X., Orlandi, R., Wady, P., Wang, Z., Labiche, M., O Donnell, D., Ollier, J., Bazzacco, D., Beghini, S., Farnea, E., Marginean, R., Mengoni, D., Montagnoli, G., Recchia, F., Scarlassara, F., Ur, C. A., Lunardi, S., Kroell, T., Gottardo, A., Aydin, S., Corradi, L., Fioretto, E., Gadea, A., Angelis, G., Marginean, N., Napoli, D. R., Silvestri, R., Stefanini, A. M., Szilner, S., Valiente-Dobon, J. J., Vedova, F. D., Axiotis, M., Martinez, T., Sean Freeman, Smith, A. G., Jones, G., Thompson, N., Haas, F., Tatjana, F., Chatillon, A., Faust, H., Fioni, G., Goutte, D., and Goutte, H.

33. Experimental study of the9541Nb level scheme using the9640Zr +12450Sn reaction with the GASP and PRISMA-CLARA arrays

Author

Rodriguez, W., Torres, D. A., Cristancho, F., Medina, N. H., Chapman, R., Smith, J. F., Mengoni, D., Truesdale, V., Grocutt, L., Mulholland, K., Hadinia, B., Labiche, M., Liang, X., O Donell, D., Ollier, J., Orlandi, R., Spohr, K. M., Wady, P., Wang, Z. M., Gadea, A., Ur, C. A., Lenzi, S. M., Capponi, L., Michelangnoli, C., Bazzacco, D., Beghini, S., Mǎrginean, R., Montagnoli, G., Recchia, F., Scarlassara, F., Lunardi, S., Kröll, T., Daniel R. Napoli, Corradi, L., Fioretto, E., Angelis, G., Mǎrginean, N., Sahin, E., Stefanini, A. M., Valiente-Dobon, J. J., Vedova, F. D., Axiotis, M., Martinez, T., Szilner, S., Freeman, S. J., Smith, A. G., Jones, G., Thompson, N., and Pollarolo, G.

34. High-spin states in the neutron-rich A similar to 100 region

Author

Torres, D. A., Chapman, R., Spohr, K. M., Smith, J. F., Kumar, V., Hodsdon, A., Liang, X., Orlandi, R., Wady, P., Wang, Z., Labiche, M., O Donnell, D., Ollier, J., Bazzacco, D., Beghini, S., Farnea, E., Marginean, R., Mengoni, D., Montagnoli, G., Recchia, F., Scarlassara, F., Ur, C. A., Lunardi, S., Kroell, T., Gottardo, A., Aydin, S., Corradi, L., Fioretto, E., Andres Gadea, Angelis, G., Marginean, N., Napoli, D. R., Silvestri, R., Stefanini, A. M., Szilner, S., Valiente-Dobon, J. J., Vedova, F. D., Axiotis, M., Martinez, T., Freeman, S. J., Smith, A. G., Jones, G., Thompson, N., Haas, F., and Tatjana, F.

36. Heavy ion transfer reactions studied with Prisma+Clara

Author

Corradi, L., Szilner, S., Pollarolo, G., Beghini, S., Fioretto, E., Guiot, B., Marginean, N. M., Mason, P., Montagnoli, G., Scarlassara, F., Silvestri, R., Stefanini, A. M., Farnea, E., Ur, C. A., Aydin, S., Giacomo de Angelis, Gadea, A., Orlandi, R., Lunardi, S., Marginean, R., Mengoni, D., Napoli, D. R., Mihai, C., Recchia, F., Sahin, E., Soić, N., Jelavić, D., Valiente-Dobon, J. J., and Vedova, F. D.

Subjects
Physics and Astronomy (all)

37. Population of neutron-rich nuclei around 48Ca with deep inelastic collisions

Author

Montanari, D., Leoni, S., Benzoni, G., Blasi, N., Bracco, A., Brambilla, S., Camera, F., Anna Corsi, Crespi, F. C. L., Million, B., Nicolini, R., Wieland, O., Corradi, L., Angelis, G., Vedova, F. D., Fioretto, E., Gadea, A., Guiot, B., Napoli, D. R., Orlandi, R., Recchia, F., Silvestri, R., Stefanini, A. M., Singh, R. P., Szilner, S., Valiente-Dobón, J. J., Bazzacco, D., Farnea, E., Lenzi, S. M., Lunardi, S., Mason, P., Mengoni, D., Montagnoli, G., Scarlassara, F., Ur, C., Lo Bianco, G., Zucchiatti, A., Kmiecik, M., Maj, A., Meczynski, W., and Pollarolo, G.

38. Experimental study of the 9541Nb level scheme using the 9640Zr + 12450Sn reaction with the GASP and PRISMA-CLARA arrays

Author

Wilmar Rodriguez, Torres, D. A., Cristancho, F., Medina, N. H., Chapman, R., Smith, J. F., Mengoni, D., Truesdale, V., Grocutt, L., Mulholland, K., Hadinia, B., Labiche, M., Liang, X., O Donell, D., Ollier, J., Orlandi, R., Spohr, K. M., Wady, P., Wang, Z. M., Gadea, A., Ur, C. A., Lenzi, S. M., Capponi, L., Michelangnoli, C., Bazzacco, D., Beghini, S., Mǎrginean, R., Montagnoli, G., Recchia, F., Scarlassara, F., Lunardi, S., Kröll, T., Napoli, D. R., Corradi, L., Fioretto, E., Angelis, G., Mǎrginean, N., Sahin, E., Stefanini, A. M., Valiente-Dobon, J. J., Vedova, F. D., Axiotis, M., Martinez, T., Szilner, S., Freeman, S. J., Smith, A. G., Jones, G., Thompson, N., and Pollarolo, G.

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