| Records |
| Author |
Mari, Federico; Melatti, Igor; Tronci, Enrico; Finzi, Alberto |
| Title |
A multi-hop advertising discovery and delivering protocol for multi administrative domain MANET |
Type |
Journal Article |
| Year |
2013 |
Publication |
Mobile Information Systems |
Abbreviated Journal |
Mobile Information Systems |
| Volume |
3 |
Issue  |
9 |
Pages |
261-280 |
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| Publisher |
IOS Press |
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Edition |
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| ISSN |
1574-017x (Print) 1875-905X (Online) |
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| Notes |
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Approved |
no |
| Call Number |
Sapienza @ melatti @ |
Serial |
109 |
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| Author |
Della Penna, Giuseppe; Intrigila, Benedetto; Melatti, Igor; Tronci, Enrico; Venturini Zilli, Marisa |
| Title |
Finite horizon analysis of Markov Chains with the Mur$\varphi$ verifier |
Type |
Journal Article |
| Year |
2006 |
Publication |
Int. J. Softw. Tools Technol. Transf. |
Abbreviated Journal |
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| Volume |
8 |
Issue |
4 |
Pages |
397-409 |
| Keywords |
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| Abstract |
In this paper we present an explicit disk-based verification algorithm for Probabilistic Systems defining discrete time/finite state Markov Chains. Given a Markov Chain and an integer k (horizon), our algorithm checks whether the probability of reaching an error state in at most k steps is below a given threshold. We present an implementation of our algorithm within a suitable extension of the Mur$\varphi$ verifier. We call the resulting probabilistic model checker FHP-Mur$\varphi$ (Finite Horizon Probabilistic Mur$\varphi$). We present experimental results comparing FHP-Mur$\varphi$ with (a finite horizon subset of) PRISM, a state-of-the-art symbolic model checker for Markov Chains. Our experimental results show that FHP-Mur$\varphi$ can handle systems that are out of reach for PRISM, namely those involving arithmetic operations on the state variables (e.g. hybrid systems). |
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| Publisher |
Springer-Verlag |
Place of Publication |
Berlin, Heidelberg |
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Edition |
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| ISSN |
1433-2779 |
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Approved |
yes |
| Call Number |
Sapienza @ mari @ Dimtz06 |
Serial |
78 |
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| Author |
Della Penna, Giuseppe; Intrigila, Benedetto; Melatti, Igor; Tronci, Enrico; Venturini Zilli, Marisa |
| Title |
Exploiting Transition Locality in Automatic Verification of Finite State Concurrent Systems |
Type |
Journal Article |
| Year |
2004 |
Publication |
Sttt |
Abbreviated Journal |
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| Volume |
6 |
Issue |
4 |
Pages |
320-341 |
| Keywords |
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| Abstract |
In this paper we show that statistical properties of the transition graph of a system to be verified can be exploited to improve memory or time performances of verification algorithms. We show experimentally that protocols exhibit transition locality. That is, with respect to levels of a breadth-first state space exploration, state transitions tend to be between states belonging to close levels of the transition graph. We support our claim by measuring transition locality for the set of protocols included in the Mur$\varphi$ verifier distribution. We present a cache-based verification algorithm that exploits transition locality to decrease memory usage and a disk-based verification algorithm that exploits transition locality to decrease disk read accesses, thus reducing the time overhead due to disk usage. Both algorithms have been implemented within the Mur$\varphi$ verifier. Our experimental results show that our cache-based algorithm can typically save more than 40% of memory with an average time penalty of about 50% when using (Mur$\varphi$) bit compression and 100% when using bit compression and hash compaction, whereas our disk-based verification algorithm is typically more than ten times faster than a previously proposed disk-based verification algorithm and, even when using 10% of the memory needed to complete verification, it is only between 40 and 530% (300% on average) slower than (RAM) Mur$\varphi$ with enough memory to complete the verification task at hand. Using just 300 MB of memory our disk-based Mur$\varphi$ was able to complete verification of a protocol with about $10^9$ reachable states. This would require more than 5 GB of memory using standard Mur$\varphi$. |
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Approved |
yes |
| Call Number |
Sapienza @ mari @ DIMTZ04j |
Serial |
91 |
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| Author |
Intrigila, Benedetto; Melatti, Igor; Tofani, Alberto; Macchiarelli, Guido |
| Title |
Computational models of myocardial endomysial collagen arrangement |
Type |
Journal Article |
| Year |
2007 |
Publication |
Computer Methods and Programs in Biomedicine |
Abbreviated Journal |
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| Volume |
86 |
Issue |
3 |
Pages |
232-244 |
| Keywords |
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| Abstract |
Collagen extracellular matrix is one of the factors related to high passive stiffness of cardiac muscle. However, the architecture and the mechanical aspects of the cardiac collagen matrix are not completely known. In particular, endomysial collagen contribution to the passive mechanics of cardiac muscle as well as its micro anatomical arrangement is still a matter of debate. In order to investigate mechanical and structural properties of endomysial collagen, we consider two alternative computational models of some specific aspects of the cardiac muscle. These two models represent two different views of endomysial collagen distribution: (1) the traditional view and (2) a new view suggested by the data obtained from scanning electron microscopy (SEM) in NaOH macerated samples (a method for isolating collagen from the other tissue). We model the myocardial tissue as a net of spring elements representing the cardiomyocytes together with the endomysial collagen distribution. Each element is a viscous elastic spring, characterized by an elastic and a viscous constant. We connect these springs to imitate the interconnections between collagen fibers. Then we apply to the net of springs some external forces of suitable magnitude and direction, obtaining an extension of the net itself. In our setting, the ratio forces magnitude /net extension is intended to model the stress /strain ratio of a microscopical portion of the myocardial tissue. To solve the problem of the correct identification of the values of the different parameters involved, we use an artificial neural network approach. In particular, we use this technique to learn, given a distribution of external forces, the elastic constants of the springs needed to obtain a desired extension as an equilibrium position. Our experimental findings show that, in the model of collagen distribution structured according to the new view, a given stress /strain ratio (of the net of springs, in the sense specified above) is obtained with much smaller (w.r.t. the other model, corresponding to the traditional view) elasticity constants of the springs. This seems to indicate that by an appropriate structure, a given stiffness of the myocardial tissue can be obtained with endomysial collagen fibers of much smaller size. |
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| Publisher |
Elsevier North-Holland, Inc. |
Place of Publication |
New York, NY, USA |
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Edition |
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| ISSN |
0169-2607 |
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Approved |
yes |
| Call Number |
Sapienza @ mari @ Imtm07 |
Serial |
82 |
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| Author |
Hayes, B. P. ; Melatti, I.; Mancini, T.; Prodanovic, M.; Tronci, E. |
| Title |
Residential Demand Management using Individualised Demand Aware Price Policies |
Type |
Journal Article |
| Year |
2017 |
Publication |
IEEE Transactions On Smart Grid |
Abbreviated Journal |
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| Volume |
8 |
Issue |
3 |
Pages |
1284-1294 |
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Approved |
no |
| Call Number |
MCLab @ davi @ |
Serial |
157 |
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| Author |
Alimguzhin, V.; Mari, F.; Melatti, I.; Salvo, I.; Tronci, E. |
| Title |
Linearising Discrete Time Hybrid Systems |
Type |
Journal Article |
| Year |
2017 |
Publication |
IEEE Transactions on Automatic Control |
Abbreviated Journal |
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| Volume |
62 |
Issue |
10 |
Pages |
5357-5364 |
| Keywords |
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| Abstract |
Model Based Design approaches for embedded systems aim at generating correct-by-construction control software, guaranteeing that the closed loop system (controller and plant) meets given system level formal specifications. This technical note addresses control synthesis for safety and reachability properties of possibly non-linear discrete time hybrid systems. By means of syntactical transformations that require non-linear terms to be Lipschitz continuous functions, we over-approximate non-linear dynamics with a linear system whose controllers are guaranteed to be controllers of the original system. We evaluate performance of our approach on meaningful control synthesis benchmarks, also comparing it to a state-of-the-art tool. |
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| ISSN |
0018-9286 |
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Approved |
no |
| Call Number |
Sapienza @ mari @ ref7902199 |
Serial |
164 |
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| Author |
Mancini, T.; Mari, F.; Massini, A.; Melatti, I.; Tronci, E. |
| Title |
SyLVaaS: System Level Formal Verification as a Service |
Type |
Journal Article |
| Year |
2016 |
Publication |
Fundamenta Informaticae |
Abbreviated Journal |
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| Volume |
149 |
Issue |
1-2 |
Pages |
101-132 |
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Approved |
no |
| Call Number |
MCLab @ davi @ DBLP:journals/fuin/ManciniMMMT16 |
Serial |
160 |
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| Author |
Della Penna, Giuseppe; Intrigila, Benedetto; Magazzeni, Daniele; Melatti, Igor; Tronci, Enrico |
| Title |
CGMurphi: Automatic synthesis of numerical controllers for nonlinear hybrid systems |
Type |
Journal Article |
| Year |
2013 |
Publication |
European Journal of Control |
Abbreviated Journal |
European Journal of Control |
| Volume |
19 |
Issue |
1 |
Pages |
14-36 |
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| Publisher |
Elsevier North-Holland, Inc. |
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Edition |
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| ISSN |
0947-3580 |
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Approved |
no |
| Call Number |
Sapienza @ melatti @ |
Serial |
114 |
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| Author |
Della Penna, Giuseppe; Di Marco, Antinisca; Intrigila, Benedetto; Melatti, Igor; Pierantonio, Alfonso |
| Title |
Interoperability mapping from XML schemas to ER diagrams |
Type |
Journal Article |
| Year |
2006 |
Publication |
Data Knowl. Eng. |
Abbreviated Journal |
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| Volume |
59 |
Issue |
1 |
Pages |
166-188 |
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| Abstract |
The eXtensible Markup Language (XML) is a de facto standard on the Internet and is now being used to exchange a variety of data structures. This leads to the problem of efficiently storing, querying and retrieving a great amount of data contained in XML documents. Unfortunately, XML data often need to coexist with historical data. At present, the best solution for storing XML into pre-existing data structures is to extract the information from the XML documents and adapt it to the data structures’ logical model (e.g., the relational model of a DBMS). In this paper, we introduce a technique called Xere (XML entity–relationship exchange) to assist the integration of XML data with other data sources. To this aim, we present an algorithm that maps XML schemas into entity–relationship diagrams, discuss its soundness and completeness and show its implementation in XSLT. |
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Elsevier Science Publishers B. V. |
Place of Publication |
Amsterdam, The Netherlands, The Netherlands |
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Edition |
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| ISSN |
0169-023x |
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| Notes |
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Approved |
yes |
| Call Number |
Sapienza @ mari @ Ddimp06 |
Serial |
77 |
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| Author |
Mari, Federico; Melatti, Igor; Salvo, Ivano; Tronci, Enrico |
| Title |
Model Based Synthesis of Control Software from System Level Formal Specifications |
Type |
Journal Article |
| Year |
2014 |
Publication |
ACM TRANSACTIONS ON SOFTWARE ENGINEERING AND METHODOLOGY |
Abbreviated Journal |
ACM TRANSACTIONS ON SOFTWARE ENGINEERING AND METHODOLOGY |
| Volume |
23 |
Issue |
1 |
Pages |
Article 6 |
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ACM |
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1049-331X |
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Approved |
no |
| Call Number |
Sapienza @ melatti @ |
Serial |
110 |
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