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Access Control via Lightweight Ontologies
No full textThe paper presents Relation Based Access Control RelBAC, a model and a logic for access control which models communities, possibly nested, and resources, possibly organized inside complex file systems, as lightweight ontologies, and permissions as relations between subjects and objects. RelBAC allows us to represent expressive access control rules beyond the current state of the art, and to deal with the strong dynamics of subjects, objects and permissions which arise in Web 2.0 applications (e.g. social networks). Finally, as shown in the paper, using RelBAC, it becomes possible to reason about access control policies and, in particular to compute candidate permissions by matching subject ontologies (representing their interests) with resource ontologies (describing their characteristics). "(c) 2011 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works." Published version is available at: http://dx.doi.org/10.1109/ICSC.2011.23. Giunchiglia, F. and Crispo, B. and Rui Zhang “Access control via lightweight ontologies”, in 2011 Fifth IEEE International Conference on Semantic Computing (ICSC), Piscataway (NJ), Institute of Electrical and Electronics Engineers, 2011, pp. 352-355 (ISBN: 978-1-4577-1648-5)
On the controllability of the semilinear heat equation with hysteresis
No full textWe study the null controllability problem for a semilinear parabolic equation, with hysteresis entering in the semilinearity. Under suitable hypotheses, we prove the controllability result and explicitly treat the cases where the hysteresis relationship is given by a Play or a Preisach operator
Unsupervised Learning of True Ranking Estimators using the Belief Function Framework
No full textA variant of the ranking aggregation problem is considered in this work. The goal is to find an approximation of an unknown true ranking given a set of rankings. We devise a solution called Belief Ranking Estimator (BRE), based on the belief function framework that permits to represent beliefs on the correctness of the rankings position as well as uncertainty on the quality of the rankings from the subjective point of view of the expert. The results of a preliminary empirical comparison of BRE against baseline ranking estimators and state-of-the-art methods for ranking aggregation are shown and discussed
Equo compenso e diritto d'autore: un'analisi comparata = Fair Compensation and Author's Rights: a Comparative Analysis
No full textOggetto di discussione in questa trattazione sono le normative sull'equo compenso per le riproduzioni private di opere dell'ingegno, più specificatamente di opere musicali, cinematografiche e letterarie, realizzate in assenza di autorizzazione da parte dei titolari dei relativi diritti d'autore. Si tratta di riproduzioni effettuate dagli utenti delle opere a beneficio di una ristretta cerchia di persone, solitamente familiari o amici, e non destinate alla circolazione in pubblico. Le copie sono prodotte in numero limitato, sovente in un unico esemplare, mediante gli strumenti tecnici tipicamente presenti nelle abitazioni private. Queste caratteristiche rendono il fenomeno facilmente distinguibile dalla cosiddetta pirateria a fini di lucro di beni protetti dal diritto d'autore, solitamente condotta mediante l'impiego di strutture aziendali clandestine per la fabbricazione e la distribuzione di copie non autorizzate. Per garantire un compenso economico ai titolari di diritti d'autore o di diritti connessi per le riproduzioni private si provvede al prelievo di una quota del prezzo dei prodotti comunemente utilizzati da utenti privati per il confezionamento delle copie dei materiali protetti. Tale quota è pagata dai produttori e dagli importatori dei prodotti in questione, ed è riscossa da appositi enti per la gestione dei diritti d'autore. Nel primo capitolo si ripercorrono brevemente gli eventi sociali e giuridici che hanno portato alla emanazione delle prime leggi istituenti un compenso per le riproduzioni ad uso privato. Successivamente si dà conto di come il modello, nato nella Repubblica Federale di Germania, sia poi circolato, con poche modifiche, in gran parte del territorio europeo, seppur con alcune significative eccezioni. La parte conclusiva del capitolo contiene una analisi comparata delle normative odierne di alcuni Paesi dell'Europa continentale, alla luce dei principi posti dai trattati internazionali sul diritto d'autore e dalla direttiva 2001/29/CE del Parlamento Europeo e del Consiglio del 22 maggio 2001, relativa all’armonizzazione di taluni aspetti del diritto d’autore e dei diritti connessi nella società dell’informazione. L'analisi è completata con l'illustrazione del recepimento del modello presso alcuni Stati extraeuropei. Nel secondo capitolo è condotto un breve studio dei fondamenti economici dei meccanismi di equo compenso per copia privata, corredato da alcune considerazioni sul rapporto giuridico intercorrente tra equo compenso e diritti esclusivi di riproduzione, avendo come riferimento in particolare il diritto italiano. Il capitolo si conclude con l'esame di alcuni profili critici delle norme sull'equo compenso, quali l'interazione con le misure tecniche di protezione e l'incidenza del prelievo sui nuovi dispositivi digitali, allo scopo di verificare l'influenza prodotta dalle leggi sulla riproduzione privata sulle nuove tecnologie e viceversa. Il terzo capitolo è dedicato all'analisi di alcune proposte avanzate da studiosi del diritto per estendere il modello di equo compenso alla condivisione non autorizzata su reti informatiche di materiali protetti da diritti d'autore, al fine di valutare la praticabilità di questo modello quale soluzione al problema del file-sharing illegale. ENGLISH ABSTRACT The object of this paper are the laws providing a fair compensation to copyright holders for the private copying of their works, such as songs and musical performances, films and books. These provisionlaws cover the unauthorized copies of copyrighted materials, typically made by the end users of the materials themselves for their private enjoyment, a notion that may eventually include an use of the copy extended to the circle of the closest relatives and friends.with t’s copying devices today so widely spread in the consumer market. The non-commercial nature (private copies are not sold nor usually made available to the public) and the limited scale of the reproduction activities mark this phenomenon, and make it easily distinguishable from the commercial “piracy”, i. e. the unauthorized serial copying made for commercial purposes. In order to grant an economic revenue to copyright holders, a levy is applied to copying devices and media sold to private consumers. The levy is paid by manufacturers and importers of the devices and is collected by copyright collecting societies. In the first chapterbriefly the social and juridical events that brought to promulgation of the first laws enacting a compensation for private copying of protected materials are briefly illustrated. The model was provided by the Federal German Republic and subsequently circulated in most of Europe. The final part of the chapter involves a comparison of the present laws of some EU Countries, under the principles established by directive 2001/29/EC of the European Parliament and of of the Council of 22 May 2001 on the harmonisation of certain aspects of copyright and related rights in the information society and by international treaties on copyright A study of the relevant laws of two non-European countries, United States of America and Canada, is included as well. The second chapter adopts a law and economics perspective to study the basic economic principles underlying the private copying and the established compensation model. It follows an analysis of some critical issues, such as the interaction between the existing compensatory schemes and technical protection measures and DRMs, and the effect of the levy on digital devices, in order to study the influence exerted by the private copying laws on new technologies and vice versa. The third and last chapter is dedicated to the study of the viability of the extension of the compensation scheme for private copying to the internet, and especially to file-sharing services, to evaluate the hypothetical possibility of a legalization of these services. Questo paper Copyright © 2011 Ruggero Brogi è pubblicato con: Creative Commons Attribuzione - non commerciale - non opere derivate 2.5 Italia License. Maggiori informazioni circa la licenza all’URL: http://creativecommons.org/licenses/by-nc-nd/2.5/it/
Simpliciana Bellica: Grimmelshausens Kriegsdarstellung und ihre Rezeption: 1667-2006
No full textThe Thirty Years War is still often referred to as the Urkatastrophe of German history, the tragic beginning of modern Germany. Few individuals have contributed more to that tradition than Hans Jakob Christoffel von Grimmelshausen. His first novel Simplicissimus Teutsch of 1668/69 marked the beginning of a ten-volume cycle of works completed in 1675. Often read simply as a picaresque account of the war and its horrors, it is in fact an extremely complex work.
[…]
Italo Michele Battafarano’s new study revisits this extraordinary work and explores its reception from the appearance of the first volume to 2006. The book is divided into three parts. The first part examines Grimmelshausen’s strategies as an author and puts his work in the context of other writings of the period, with particular reference to autobiographical elements and their relation to fictions and metafictions. The second part explores the relationship between key elements of
Grimmelshausen’s depiction of the Thirty Years War and the reality of the war. […] The third part […], devoted to Grimmelshausen’s reception, contains material that is genuinely new. According to Battafarano, the reception of Grimmelshausen’s work really began with the publication of the first critical edition by Adelbert von Keller in 1854, and specifically with the re-evaluation of the Thirty Years War in the wake of German unification in 1871. […] Battafarano then traces the work’s subsequent reception in the First and Second World Wars, finding Grimmelshausen cited as a precursor of pan-Germanism, as well as a proponent of every conceivable pro- and anti-war view. Two particularly fascinating sections examine French views of Simplicissimus in the 1940s and references to the work at the Nuremberg Trials. Finally, Battafarano finds Grimmelshausen invoked again in Godard’s Finis Germaniae (1991), in the German discussion of the Second Gulf War (1991), and in Grass’s 2006 autobiography. These chapters of Battafarano’s book are fascinating: suitably extended, they would have made an excellent book on their own.
(Joachim Whaley, "Simpliciana Bellica : [review]", in Modern Language Review (July 2013), vol. 108, pt. 3, p. 993-4
Educazione interculturale e apprendimento cooperativo: teoria e pratica della educazione tra pari
No full textL’articolo spazia attraverso la letteratura di quest’ultimo trentennio sul metodo Cooperative Learning e le sue applicazioni nell’integrazione degli allievi nel gruppo-classe. In particolare, indaga sulle relazioni fra apprendimento di gruppo cooperativo e relazioni interetniche, attraverso i modelli di educazione tra pari [peer-tutoring e peer- education] che sono modelli educativi tra i più efficaci, in particolare nella didattica della lingua e nell’apprendimento della lettura, assolutamente consigliabili nelle nostre scuole di oggi sempre più alle prese con il problema di integrazione degli stranieri e dei ‘diversi’ nella cultura nascente della nostra nuova scuola
Exploitation of Parasitic Smart Antennas in Wireless Sensor Networks
No full textThe integration of smart antennas in wireless sensor networks is a challenging and very attractive technical solution to improve the system capacity, the quality of service, and the power control. In this paper, some benefits coming from such an integration are experimentally assessed dealing with a set of test scenarios. Finally, some conclusions are discussed in order to point out current potentialities and limitations of the smart antennas integration to envisage future and possible advances
Analytic Design Techniques for MPT Antenna Arrays
No full textSolar Power Satellites (SPS) represent one of the most interesting technological opportunities to provide large scale, environmentally clean and renewable energy to the Earth [1]‐[3]. A fundamental and critical component of SPSs is the Microwave Power Transmission (MPT) system, which is responsible for the delivery of the collected solar power to the ground rectenna [2]. Towards this end, the MPT array must exhibit a narrow main beam width (), a high beam efficiency (BWBE), and a low peak sidelobe level (). Moreover, reduced realization costs and weights are also necessary [3]. To reach these contrasting goals, several design techniques have been investigated including random methods [4] and hybrid deterministic‐random approaches [2][3]. On the contrary, well‐established design tools based on stochastic optimizers [5][6] are difficult to be employed, due to their high computational costs when dealing with large arrays as those of interest in SPS [3]
Multi-Resolution Approaches for Inverse Scattering Problems
No full textIn the framework of microwave imaging, inverse scattering techniques currently represent the state-of-the-art for the quantitative reconstruction of the region under test. In such a framework, multi‐resolution techniques have recently appeared in order to increase the effectiveness of the inversion procedure. To properly deal with the ill‐posedness characterizing their mathematical model and at the same time enhance the achievable spatial resolution, such a paper presents and discusses several multi‐resolution approaches based on the use of multi‐resolution and suitable basis functions for the problem unknowns
Numerical Validation and Experimental Results of a Multi-Resolution SVM-Based Classification Procedure for Breast Imaging
No full textX‐Ray mammography is the principal technique for breast cancer screening in clinical practice. However, X‐ray mammography presents different drawbacks showing that alternative technologies are desirable. For example, the difficulty in detecting the breast tumors at the earlier stage, the destructive effects of the ionizing X‐rays on the irradiated tissues, low efficiency in dense breasts and with cancer near the chest wall. Other minor but still negative aspects are also the discomfort due to the breast compression and the expensive costs [1]