2,676 research outputs found
SNR-based Reinforcement Learning Rate Adaptation for Time Critical Wi-Fi Networks: Assessment through a Calibrated Simulator
No full textNowadays, the Internet of Things is spreading in several different research fields, such as factory automation, instrumentation and measurement, and process control, where it is referred to as Industrial Internet of Things. In these scenarios, wireless communication represents a key aspect to guarantee the required pervasive connectivity required. In particular, Wi-Fi networks are revealing ever more attractive also in time- and mission-critical applications, such as distributed measurement systems. Also, the multi-rate support feature of Wi-Fi, which is implemented by rate adaptation (RA) algorithms, demonstrated its effectiveness to improve reliability and timeliness. In this paper, we propose an enhancement of RSIN, which is a RA algorithm specifically conceived for industrial real-time applications. The new algorithm starts from the assumption that an SNR measure has been demonstrated to be effective to perform RA, and bases on Reinforcement Learning techniques. In detail, we start from the design of the algorithm and its implementation on the OmNet++ simulator. Then, the simulation model is adequately calibrated exploiting the results of a measurement campaign, to reflect the channel behavior typical of industrial environments. Finally, we present the results of an extensive performance assessment that demonstrate the effectiveness of the proposed technique
Discorso pedagogico e prospettiva sistemico-relazionale
No full textStarting with a few thoughts about the current pedagogical debate expressed within the work, the contribution of Luigi Pati, highlights the importance of relational systems perspective in the pedagogical discourse. The author proposes an analysis and historical evolution of the General Theory of Systems (TGS), illustrating the importance of the same in the action and in the educational relationship between educator and student
Sobre Luigi Ferrajoli y el constitucionalismo
No full textIn this paper, the author poses several general questions on Luigi Ferrajoli’s paper. Firstly, he writes on Ferrajoli’s construction of a theory that comprehensively infers, still always in a deductive way, the scope of a complex set of primitive terms and definitions. Secondly, the author questions his way to understand and particularly to reconstruct the so-called «constitutional paradigm». Thirdly, the author writes about Ferrajoli’s approach to the concepts of «validity» and «enforcement» of rules. Fourthly, he discusses Ferrajoli’s definition of garantist constitutionalism, particularly his conception of this sort of constitutionalism as an improvement or complement to legal positivism -inasmuch as constitutionalism respects both the being of the Law and its normative or ideal (must be) dimension. Finally, he revises the objections that Ferrajoli addressed to constitutionalism (the thesis of the separation between Law and morality, the distinction between principles and rules and the criticism of the weighting) introducing new arguments.El autor plantea una serie de objeciones al texto de Luigi Ferrajoli. En primer lugar, se refiere a la construcción por parte de Ferrajoli de una teoría que infiere de un modo exhaustivo, pero siempre deductivamente, el alcance de un complejo conjunto de términos primitivos y definiciones. En segundo lugar, el autor duda sobre la forma de ver y, sobre todo, de reconstruir el llamado «paradigma constitucional». En tercer lugar, el autor objeta el tratamiento que Ferrajoli hace de los conceptos de «validez» y «vigor» de las normas. En cuarto lugar, hace referencia a la definición que Ferrajoli realiza del constitucionalismo garantista, en concreto a la consideración de éste como mejora o complemento del positivismo jurídico que se logra gracias a que el constitucionalismo observa no sólo el «ser» sino el «deber ser» del Derecho. Finalmente, repasa las críticas que Ferrajoli realiza al constitucionalismo (la tesis de la separación entre Derecho y moral, la distinción entre principios y reglas y la crítica a la ponderación), expresando sus diferencias
An IoT Measurement System Based on LoRaWAN for Additive Manufacturing
No full textThe Industrial Internet of Things (IIoT) paradigm represents a significant leap forward for sensor networks, potentially enabling wide-area and innovative measurement systems. In this scenario, smart sensors might be equipped with novel low-power and long range communication technologies to realize a so-called low-power wide-area network (LPWAN). One of the most popular representative cases is the LoRaWAN (Long Range WAN) network, where nodes are based on the widespread LoRa physical layer, generally optimized to minimize energy consumption, while guaranteeing long-range coverage and low-cost deployment. Additive manufacturing is a further pillar of the IIoT paradigm, and advanced measurement capabilities may be required to monitor significant parameters during the production of artifacts, as well as to evaluate environmental indicators in the deployment site. To this end, this study addresses some specific LoRa-based smart sensors embedded within artifacts during the early stage of the production phase, as well as their behavior once they have been deployed in the final location. An experimental evaluation was carried out considering two different LoRa end-nodes, namely, the Microchip RN2483 LoRa Mote and the Tinovi PM-IO-5-SM LoRaWAN IO Module. The final goal of this research was to assess the effectiveness of the LoRa-based sensor network design, both in terms of suitability for the aforementioned application and, specifically, in terms of energy consumption and long-range operation capabilities. Energy optimization, battery life prediction, and connectivity range evaluation are key aspects in this application context, since, once the sensors are embedded into artifacts, they will no longer be accessible
Six Characters in Search of an Author (Text)
No full textSix Characters in Search of an Author (Sei personaggi in cerca d’autore) is an Italian three-act play written by Luigi Pirandello in 1921, considered as one of the earliest examples of absurdist theatre. It’s a play within a play that deals with perceptions of reality and illusion, and plays with the ideas of identity and relative truths
Luigi Pirandello: In Search of an Author
No full textIn 1925 Luigi Pirandello brought his troupe to England as part of a worldwide tour. This classic program re-creates one day in London as "The Einstein of the Theater" watches his plays and, away from the footlights, confronts the paradoxical nature of his life. Portions of Six Characters in Search of an Author; Henry IV; Right You Are, If You Think You Are; and The Rules of the Game are meticulously staged, using actors' accounts, period descriptions, and Pirandello's own comments. Plus, biographical notes written by Pirandello himself provide a new angle on the inner torment that animates his work, while playwright Julian Mitchell and novelist Leonardo Sciascia critically analyze the action as it unfolds. (60 minutes, color
Organizing Chamber Music as Culture
No full textIn this paper Luigi Maria Sicca suggests on the one hand that organization theory offers an interpretation of the reality of arts producing organizations and on the other that the empirical analysis of these realities can supply new input for organization theory. As a practical example of artistic production the Author refers to an international chamber music festival. Close inspection of chamber music will reveal characteristics that apply to any type of organization. Sicca begins by looking at the nature of arts management and the arts manager. L.M.Sicca goes on to analyse the characteristics of the production process in the performing arts, which can be seen as communication taking place on three levels: between audience and performers (concept of “prosumer”); within the performing group (“listening ability”); between the author of the written text and the performer/interpreter (“concept of value”). Luigi Maria Sicca finishes by showing how in a symbolic-cultural framework the features identified in the paper can feed back into organization studies
L'educazione per la conquista dell'identità personale
No full textThe essay argues the need to pay attention to the educational growth and welfare of the individual personality that has relations in a certain context. The author reflects on the strategies through which the environment can facilitate or not the process of individual humanization
Six Characters In Search Of An Author
No full textProgram from the Little Theatre of Dallas' 1932 production of 'Six Characters In Search Of An Author,' written by Luigi Pirandello and directed by Charles Meredith. Setting arrangement by Alexandre Hogue. Cover art by Leon Dacus. Exhibitions by Olin Herman Travis and Kathryne Hail Travis
Una procedura non parametrica per l'analisi di studi osservazionali con applicazione allo studio dell'insorgenza di tumori cutanei nei pazienti trapiantati
No full text- …
