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Author Pugliese, Rosario; Tronci, Enrico doi  openurl
  Title Automatic Verification of a Hydroelectric Power Plant Type Conference Article
  Year 1996 Publication Third International Symposium of Formal Methods Europe (FME), Co-Sponsored by IFIP WG 14.3 Abbreviated Journal  
  Volume Issue Pages 425-444  
  Keywords  
  Abstract We analyze the specification of a hydroelectric power plant by ENEL (the Italian Electric Company). Our goal is to show that for the specification of the plant (its control system in particular) some given properties hold. We were provided with an informal specification of the plant. From such informal specification we wrote a formal specification using the CCS/Meije process algebra formalism. We defined properties using μ-calculus. Automatic verification was carried out using model checking. This was done by translating our process algebra definitions (the model) and μ-calculus formulas into BDDs. In this paper we present the informal specification of the plant, its formal specification, some of the properties we verified and experimental results.  
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  Corporate Author Thesis  
  Publisher Springer Place of Publication Oxford, UK Editor Gaudel, M.-C.; Woodcock, J.  
  Language Summary Language Original Title  
  Series Editor Series Title Lecture Notes in Computer Science Abbreviated Series Title  
  Series Volume 1051 Series Issue Edition  
  ISSN 3-540-60973-3 ISBN Medium  
  Area (up) Expedition Conference  
  Notes Approved yes  
  Call Number Sapienza @ mari @ fme96 Serial 53  
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Author Tronci, Enrico pdf  doi
openurl 
  Title Equational Programming in Lambda-Calculus via SL-Systems. Part 1 Type Journal Article
  Year 1996 Publication Theoretical Computer Science Abbreviated Journal  
  Volume 160 Issue 1&2 Pages 145-184  
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  Area (up) Expedition Conference  
  Notes Approved yes  
  Call Number Sapienza @ mari @ tcs96 Serial 54  
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Author Tronci, Enrico pdf  doi
openurl 
  Title Equational Programming in Lambda-Calculus via SL-Systems. Part 2 Type Journal Article
  Year 1996 Publication Theoretical Computer Science Abbreviated Journal  
  Volume 160 Issue 1&2 Pages 185-216  
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  Notes Approved yes  
  Call Number Sapienza @ mari @ tcs96a Serial 55  
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Author Tronci, Enrico pdf  doi
openurl 
  Title Equational Programming in lambda-calculus Type Conference Article
  Year 1991 Publication Sixth Annual IEEE Symposium on Logic in Computer Science (LICS) Abbreviated Journal  
  Volume Issue Pages 191-202  
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  Publisher IEEE Computer Society Place of Publication Amsterdam, The Netherlands Editor  
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  Notes Approved yes  
  Call Number Sapienza @ mari @ lics91 Serial 58  
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Author Bobbio, Andrea; Bologna, Sandro; Minichino, Michele; Ciancamerla, Ester; Incalcaterra, Piero; Kropp, Corrado; Tronci, Enrico pdf  url
openurl 
  Title Advanced techniques for safety analysis applied to the gas turbine control system of Icaro co generative plant Type Conference Article
  Year 2001 Publication X Convegno Tecnologie e Sistemi Energetici Complessi Abbreviated Journal  
  Volume Issue Pages 339-350  
  Keywords  
  Abstract The paper describes two complementary and integrable approaches, a probabilistic one and a deterministic one, based on classic and advanced modelling techniques for safety analysis of complex computer based systems. The probabilistic approach is based on classical and innovative probabilistic analysis methods. The deterministic approach is based on formal verification methods. Such approaches are applied to the gas turbine control system of ICARO co generative plant, in operation at ENEA CR Casaccia. The main difference between the two approaches, behind the underlining different theories, is that the probabilistic one addresses the control system by itself, as the set of sensors, processing units and actuators, while the deterministic one also includes the behaviour of the equipment under control which interacts with the control system. The final aim of the research, documented in this paper, is to explore an innovative method which put the probabilistic and deterministic approaches in a strong relation to overcome the drawbacks of their isolated, selective and fragmented use which can lead to inconsistencies in the evaluation results.  
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  Corporate Author Thesis  
  Publisher Place of Publication Genova, Italy Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
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  Area (up) Expedition Conference  
  Notes Approved yes  
  Call Number Sapienza @ mari @ tesec01 Serial 65  
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Author Intrigila, Benedetto; Salvo, Ivano; Sorgi, Stefano pdf  doi
openurl 
  Title A characterization of weakly Church-Rosser abstract reduction systems that are not Church-Rosser Type Journal Article
  Year 2001 Publication Information and Computation Abbreviated Journal  
  Volume 171 Issue 2 Pages 137-155  
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  Abstract Basic properties of rewriting systems can be stated in the framework of abstract reduction systems (ARS). Properties like confluence (or Church-Rosser, CR) and weak confluence (or weak Church-Rosser, WCR) and their relationships can be studied in this setting: as a matter of fact, well-known counterexamples to the implication WCR CR have been formulated as ARS. In this paper, starting from the observation that such counterexamples are structurally similar, we set out a graph-theoretic characterization of WCR ARS that is not CR in terms of a suitable class of reduction graphs, such that in every WCR not CR ARS, we can embed at least one element of this class. Moreover, we give a tighter characterization for a restricted class of ARS enjoying a suitable regularity condition. Finally, as a consequence of our approach, we prove some interesting results about ARS using the mathematical tools developed. In particular, we prove an extension of the Newman’s lemma and we find out conditions that, once assumed together with WCR property, ensure the unique normal form property. The Appendix treats two interesting examples, both generated by graph-rewriting rules, with specific combinatorial properties.  
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  Publisher Academic Press, Inc. Place of Publication Duluth, MN, USA Editor  
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  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0890-5401 ISBN Medium  
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  Notes Approved yes  
  Call Number Sapienza @ mari @ Intrigila-Salvo-Sorgi:01 Serial 68  
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Author Bucciarelli, Antonio; Piperno, Adolfo; Salvo, Ivano file  doi
openurl 
  Title Intersection types and λ-definability Type Journal Article
  Year 2003 Publication Mathematical Structures in Computer Science Abbreviated Journal  
  Volume 13 Issue 1 Pages 15-53  
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  Abstract This paper presents a novel method for comparing computational properties of λ-terms that are typeable with intersection types, with respect to terms that are typeable with Curry types. We introduce a translation from intersection typing derivations to Curry typeable terms that is preserved by β-reduction: this allows the simulation of a computation starting from a term typeable in the intersection discipline by means of a computation starting from a simply typeable term. Our approach proves strong normalisation for the intersection system naturally by means of purely syntactical techniques. The paper extends the results presented in Bucciarelli et al. (1999) to the whole intersection type system of Barendregt, Coppo and Dezani, thus providing a complete proof of the conjecture, proposed in Leivant (1990), that all functions uniformly definable using intersection types are already definable using Curry types.  
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  Publisher Cambridge University Press Place of Publication New York, NY, USA Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0960-1295 ISBN Medium  
  Area (up) Expedition Conference  
  Notes Approved yes  
  Call Number Sapienza @ mari @ Bucciarelli-Piperno-Salvo:MSCS-03 Serial 69  
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Author Bucciarelli, Antonio; Salvo, Ivano pdf  doi
openurl 
  Title Totality, Definability and Boolean Circuits Type Journal Article
  Year 1998 Publication Abbreviated Journal  
  Volume 1443 Issue Pages 808-819  
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  Abstract In the type frame originating from the flat domain of boolean values, we single out elements which are hereditarily total. We show that these elements can be defined, up to total equivalence, by sequential programs. The elements of an equivalence class of the totality equivalence relation (totality class) can be seen as different algorithms for computing a given set-theoretic boolean function. We show that the bottom element of a totality class, which is sequential, corresponds to the most eager algorithm, and the top to the laziest one. Finally we suggest a link between size of totality classes and a well known measure of complexity of boolean functions, namely their sensitivity.  
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  Publisher Springer Place of Publication Editor  
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  Notes Approved yes  
  Call Number Sapienza @ mari @ bucciarelli-salvo:98 Serial 70  
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Author Bucciarelli, Antonio; de Lorenzis, Silvia; Piperno, Adolfo; Salvo, Ivano pdf  doi
openurl 
  Title Some Computational Properties of Intersection Types (Extended Abstract) Type Journal Article
  Year 1999 Publication Abbreviated Journal  
  Volume Issue Pages 109-118  
  Keywords lambda calculusCurry types, intersection types, lambda-definability, lambda-terms, strong normalization  
  Abstract This paper presents a new method for comparing computation-properties of λ-terms typeable with intersection types with respect to terms typeable with Curry types. In particular, strong normalization and λ-definability are investigated. A translation is introduced from intersection typing derivations to Curry typeable terms; the main feature of the proposed technique is that the translation is preserved by β-reduction. This allows to simulate a computation starting from a term typeable in the intersection discipline by means of a computation starting from a simply typeable term. Our approach naturally leads to prove strong normalization in the intersection system by means of purely syntactical techniques. In addition, the presented method enables us to give a proof of a conjecture proposed by Leivant in 1990, namely that all functions uniformly definable using intersection types are already definable using Curry types.  
  Address  
  Corporate Author Thesis  
  Publisher IEEE Computer Society Place of Publication Editor  
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  Notes Approved yes  
  Call Number Sapienza @ mari @ bucciarelli-delorenzis-piperno-salvo:99 Serial 71  
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Author Bono, V.; Salvo, I. pdf  url
doi  openurl
  Title A CuCh Interpretation of an Object-Oriented Language Type Journal Article
  Year 2001 Publication Electronic Notes in Theoretical Computer Science Abbreviated Journal  
  Volume 50 Issue 2 Pages 159-177  
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  Abstract CuCh machine extends pure lambda–calculus with algebraic data types and provides a the possibility of defining functions over the disjoint sum of algebras. We exploit such natural form of overloading to define a functional interpretation of a simple, but significant fragment of a typical object-oriented language.  
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  Corporate Author Thesis  
  Publisher Elsevier Place of Publication Editor  
  Language Summary Language Original Title  
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  Notes BOTH 2001, Bohm’s theorem: applications to Computer Science Theory (Satellite Workshop of ICALP 2001) Approved yes  
  Call Number Sapienza @ mari @ Bono-Salvo:BOTH01 Serial 72  
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