Feature selection is called wrapper whenever the classification algorithm is used in the selection procedure. Our approach makes use of linear classifiers wrapped into a genetic algorithm. As a proof of concept we check its performance against the UCI spam filtering problem showing that the wrapping of linear neural networks is the best. However, making sense of data involves not only selecting...

Information integration systems combine data from multiple heterogeneous Web services to answer complex user queries, provided a user has semantically modeled the service first. To model a service, the user has to specify semantic types of the input and output data it uses and its functionality. As large number of new services come online, it is impractical to require the user to come up with a...

English. This paper presents the steps undertaken for building a word formation lexicon for Latin. The types of word formation rules are discussed and the semiautomatic procedure to pair their input and output lexical items is evaluated. An on-line graphical query system to access the lexicon is described as well. Italiano. Questo articolo presenta le procedure di realizzazione di un lessico mo...

The decidability of equivalence for three important classes of tree transducers is discussed. Each class can be obtained as a natural restriction of deterministic macro tree transducers (MTTs): (1) no context parameters, i.e., top-down tree transducers, (2) linear size increase, i.e., MSO definable tree transducers, and (3) monadic input and output ranked alphabets. For the full class of MTTs, ...

We study single error-correcting codes for the asymmetric channel with input and output alphabets being {0, 1 ..... a 1/. From an abe|ian group G of order N with elements go = O, gl ..... gN 1, Constantin and Rao (1979, Inform. Contr. 40, 20-36) define Vg = {(b~, b2 ..... bN1) C {0, 1 ..... a -1 }N-I I Z~-,' b~gi = g} and show that Vg correct single errors. We give explicit expressions for the ...

This paper presents a 1.2V/2.5V tolerant I/O buffer design with only thin gate-oxide devices. The novel floating N-well and gate-tracking circuits in mixed-voltage I/O buffer are proposed to overcome the problem of leakage current, which will occur in the conventional CMOS I/O buffer when using in the mixedvoltage I/O interfaces. The new proposed 1.2V/2.5V tolerant I/O buffer design has been su...

We present a general approach to the incremental development of model-based applications using endogenous transformations, i.e. transformations whose input and output models conform to the same metamodel. Our work describes these transformations as model deltas that, when composed, deliver a complete model. We establish a relationship between a metamodel and its corresponding delta metamodel, s...

Industrial symbiosis (IS) is a subdiscipline of Industrial Ecology that aims to bring together companies from different sectors to share resources, namely energy, materials, and water. The main goal of IS is to improve resource (materials, waste, energy) efficiency and lead to mutual environmental, financial and social benefits to participants. In this paper we present a semantic approach for I...

The paper uses Data Envelopment Analysis (DEA) to assess the efficiency of the Depertments of the University of Trieste, considering both research and teaching issues. General guidelines for selecting input and output flows are proposed, different DEA models are considered and discussed, and the quantitative outcomes of the evaluation are analyzed.

Analytical expressions are derived which relate the optical bandwidth and the fabrication tolerances of multimode interference (MMI) couplers to their most important design parameters. These expressions compare adequately with mode analysis simulations. For strong guided structures, the optical bandwidth is shown to be inversely proportional to the number of input and output ports N and to the ...