5,863 research outputs found
Aeroelastic analysis of an adaptive trailing edge with a smart elastic skin
No full textNowadays, the design choices of the new generation aircraft are moving towards the research and development of innovative technologies, aimed at improving performance as well as to minimize the environmental impact. In the current “greening” context, the morphing structures represent a very attractive answer to such requirements: both aerodynamic and structural advantages are ensured in several flight conditions, safeguarding the fuel consumption at the same time. An aeronautical intelligent system is therefore the outcome of combining complex smart materials and structures, assuring the best functionality level in the flight envelope. The Adaptive Trailing Edge Device (ATED) is a sub-project inside SARISTU (Smart Intelligent Aircraft Structures), an L2 level project of the 7th EU Framework programme coordinated by Airbus, aimed at developing technologies for realizing a morphing wing extremity addressed to improve the general aircraft performance and to reduce the fuel burning up to 5%. This specific study, divided into design, manufacturing and testing phases, involved universities, research centers and leading industries of the European consortium. The paper deals with the aeroelastic impact assessment of a full-scale morphing wing trailing edge on a Large Aeroplanes category aircraft. The FE (Finite Element) model of the technology demonstrator, located in the aileron region and manufactured within the project, was referenced to for the extrapolation of the structural properties of the whole adaptive trailing edge device placed in its actual location in the outer wing. The input FE models were processed within MSC-Nastran® environment to estimate stiffness and inertial distributions suitable to construct the aeroelastic stick-beam mock-up of the reference structure. Afterwards, a flutter analysis in simulated operative condition, have been carried out by means of Sandy®, an in-house code, according to meet the safety requirements imposed by the applicable aviation regulations (paragraph 25.629, parts (a) and (b)-(1))
Domenico Rea, La mia Napoli, a cura di Vincenzo Salerno, con una nota di Angelo Petrella e un ricordo di Lucia Rea,
No full textDei quattordici testi in prosa di Domenico Rea, qui di seguito proposti, cinque (“Padre Rocco”, “Francesco Solimena”, “Andrea Perrucci”, “Carlo III”, “Museo Archeologico”) sono tratti dal volume Pagine su Napoli; stampato a Napoli nel 1995 ed edito – fuori commercio – dall’Azienda autonoma di soggiorno e turismo, con la prefazione firmata da Sandro Castronuovo. Il libro esce a un anno di distanza dalla morte dello scrittore e antologizza cento articoli, selezionati tra quelli che – nei nove anni precedenti – Rea aveva scritto per “Qui Napoli”, rivista mensile pubblicata dall’Azienda autonoma campana di promozione turistica. Molti dei ‘pezzi’ scelti per la versione a stampa di Pagine su Napoli sono conservati presso l’archivio del Centro di Ricerca “Domenico Rea”, ospitato a Villa Lanzara a Sarno (in provincia di Salerno). In aggiunta, nello stesso faldone contenente i fogli dattiloscritti del volume, sono custoditi anche altri articoli ‘espunti’ dall’edizione finale del 1995; raccolti (in una cartellina trasparente, senza indicazione di data) col titolo Naples. Tra questi, i nove testi che completano l’indice de La mia Napoli: “Catacombe di San Gennaro”, “Cimitero delle Fontanelle”, “Rione Sanità”, “L’orto Botanico”, “L’albergo dei poveri” “Porta Nolana”, “Porta Capuana”, “Forcella” e “Le Anime del Purgatorio”
Gaze contingency in turn-taking for human robot interaction: Advantages and drawbacks
No full textPalinko O, Sciutti A, Schillingmann L, Rea F, Nagai Y, Sandini G. Gaze Contingency in Turn-Taking for Human Robot Interaction: Advantages and Drawbacks. Presented at the 24th IEEE International Symposium on Robot and Human Interactive Communication
Hypoglycemia and reduction of the insulin requirement as a sign of coeliac disease in children with IDDM
No full textDomenico Rea e il Novecento italiano
No full textIt truly would be a mistake to associate Domenico Rea with the critical cliché of the "rediscovered writer." Important bibliographic "clues" (works by and about Rea, have been consistently published in recent decades), which would inevitably direct us towards the mammoth 'proof' of the Meridiano, edited by the late Francesco Durante in 2005. Specific names need not be mentioned here, as they are mostly indicated and discussed in the essays in this volume. Instead, it is important to highlight the corollary derived from this preliminary evidence. If this is the case, if Rea's writing has continued to be read and discussed in different forms and ways over the years, then the question is not so much one of, so as to say - give Rea what is Rea's. Rather, the problem becomes one of verifying the methods, timing, and critical formulas of this continuity. In other words, a reflection on the production of the Neapolitan writer - and setting the ambitious goal of being 'wide-ranging' - must bring to light unfounded spaces, unpublished and rare materials so as to reconstruct friendships and intellectual relationships, to reason as to the longevity of his work and its internal relationships. In recent years, the activities of the 'National Committee for the celebrations of the centenary of his birth', established by Ministerial Decree 220, 17 June 2021, and chaired by Pasquale Sabbatino, have focused on these objectives. Starting from the opening conference "Domenico Rea and Italian Twentieth Century" (Naples, November 9-11, 2021), the proceedings of which are published here, an attempt has been made to transform this centenary into a broader "critical occasion".PublishedSarebbe davvero un errore associare alla figura di Domenico Rea il cliché critico dello ‘scrittore da riscoprire’. A dimostrare l’evidenza di tale errore ci sarebbero importanti ‘indizi’ bibliografici (‘opere di’ e ‘opere su’ Rea, edite con continuità negli ultimi decenni), i quali inevitabilmente ci condurrebbero verso la ‘prova’ mastodontica del Meridiano curato dal compianto Francesco Durante e risalente al 2005. Inutile fare nomi specifici, che sono per lo più indicati e discussi nei saggi di questo volume. Preme invece esplicitare il corollario, che deriva da tale preventiva evidenza. Se le cose stanno così, ovvero se la scrittura di Rea ha continuato in forme e modi diversi nel corso di questi anni a essere letta e discussa, allora la questione non è tanto quella – per dir così – di dare a Rea quel che è di Rea. Il problema diviene piuttosto verificare i modi, i tempi e le formule critiche di tale continuità. Insomma una riflessione sulla produzione dello scrittore napoletano, che si ponga l’ambizioso obiettivo di essere ‘ad ampio raggio’, deve provare a riportare alla luce spazi insondati, materiali inediti e rari, a ricostruire legami amicali e relazioni intellettuali, a ragionare sul tempo lungo della sua opera e sui suoi rapporti interni. A questi obiettivi ha puntato, nel corso degli ultimi anni, l’attività del ‘Comitato nazionale per le celebrazioni del centenario della nascita di Domenico Rea’, istituito con D.M. 220 il 17 giugno 2021 e presieduto da Pasquale Sabbatino. A partire dal Convegno d’apertura Domenico Rea e il Novecento italiano (Napoli, 9-11 novembre 2021), di cui qui si pubblicano gli Atti, si è provato a trasformare tale centenario in una più generale ‘occasione critica’
Francesco Scorza Barcellona o della passione agiografica
No full textL'autrice traccia, sul filo dei ricordi, il profilo scientifico ed umano di Francesco Scorza Barcellona ed introduce gli studi raccolti nel volume.The author traces, on the thread of memories, the scientific and human profile of Francesco Scorza Barcelona and introduces the studies collected in the book
Perception is Only Real When Shared: A Mathematical Model for Collaborative Shared Perception in Human-Robot Interaction
No full textPartners have to build a shared understanding of their environment in everyday collaborative tasks by aligning their perceptions and establishing a common ground. This is one of the aims of shared perception: revealing characteristics of the individual perception to others with whom we share the same environment. In this regard, social cognitive processes, such as joint attention and perspective-taking, form a shared perception. From a Human-Robot Interaction (HRI) perspective, robots would benefit from the ability to establish shared perception with humans and a common understanding of the environment with their partners. In this work, we wanted to assess whether a robot, considering the differences in perception between itself and its partner, could be more effective in its helping role and to what extent this improves task completion and the interaction experience. For this purpose, we designed a mathematical model for a collaborative shared perception that aims to maximise the collaborators’ knowledge of the environment when there are asymmetries in perception. Moreover, we instantiated and tested our model via a real HRI scenario. The experiment consisted of a cooperative game in which participants had to build towers of Lego bricks, while the robot took the role of a suggester. In particular, we conducted experiments using two different robot behaviours. In one condition, based on shared perception, the robot gave suggestions by considering the partners’ point of view and using its inference about their common ground to select the most informative hint. In the other condition, the robot just indicated the brick that would have yielded a higher score from its individual perspective. The adoption of shared perception in the selection of suggestions led to better performances in all the instances of the game where the visual information was not a priori common to both agents. However, the subjective evaluation of the robot’s behaviour did not change between conditions
Design of an adaptive twist trailing edge for large commercial aircraft applications
No full textResearchers and engineers design modern aircraft wings to reach high levels of efficiency with the main outcome of weight saving and airplane lift-to-drag ratio increasing. Future commercial aircraft need to be mission-adaptive to improve their operational efficiency. Twistable trailing edge could be used to improve aircraft performances during climb and off-design cruise conditions in response to variations in speed, altitude, air temperature, and other flight parameters. Indeed, “continuous” span-wise twist of the wing trailing edge could provide significant reduction of the wing root bending moment through redistribution of the aerodynamic load leading to an increase of the payload/structural weight ratio. Within the framework of the Clean Sky 2 (CS2) European research project, the authors focused on the preliminary design of a full-scale composite multi-functional tab retrofitting the outboard morphing fowler flap of a turboprop regional aircraft. The investigation domain of the novel device is equal to 5.15 meters in span-wise direction and 10% of the local wing chord.
The structural and kinematic design process of the actuation system is completely addressed: two rotary electro-mechanical motors, placed in the root and tip flap sections, are required to activate the inner mechanisms enabling delta twist angles up to 10 degrees along the outboard region when the flap is stowed in the wing. The structural layout of the thin-walled closed-section composite tab represents a promising concept to balance the conflicting requirements between load-carrying capability and shape adaptivity in morphing lightweight structures. The main design parameters are optimized to minimize actuation torque required for twisting while providing proper flexural rigidity to withstand limit aerodynamic pressure distributions for large airplanes. Finally, the embedded system functionality of the actuation system coupled with the composite wing trailing edge is fully investigated by means of detailed finite element simulations. Results of actuation system performances, and aeroelastic deformations considering operative aerodynamic loads demonstrate the potential of the proposed structural concept to be energy efficient, and lightweight for real aircraft implementation
Delle lodi di don Francesco Medici de' principi di Toscana : orazione /
No full textEngraved t.p. vignette of Medici arms. On recto of 2nd leaf is Callot's full-page engraved port. of Francesco de' Medici, son of Grand Duke Ferdinand I. It is in Lieure's 1st state. The port. also appeared the same year in Alessandro Adimari's Esequie dell' ill.mo & ecc.mo principe don Francesco Medici (Florence : Gio. Donato & Bernardino Giunti); see Lieure. Large woodcut Giunti device on p. [31].Lieure, J. Jacques Callot,Mode of access: Internet.At head of front pastedown is bookplate of Francesco Riccardi de Vernaccia (Florence, ca. 1780; see Gelli, p. 387). Below it is the label of Horatius (Orazio) Landau, with stamped shelfmark 53021. At foot is the bookplate of U. Manganelli, signed with the initials SER. A dedicatory inscription at foot of t.p. has been scratched out.Binding: modern marbled paper, backed in green vellum. Date, author & title writte on spine.Port. trimmed into the image at right margin and foot
- …
