This paper describes some experiments based on the use of neural networks for assistence an the quality assessment of programs, especially in connection with the reengineering of legacy systems. W e use Kohonen networks, or self-organizing maps, for the categorization of programs: Programs with similar features are grouped together in atwo-dimensional neighbourhood, whereas dissimilar programs ...

This paper describes some experiments based on the use of neural networks for assistence in the quality assessment of programs, especially in connection with the reengineering of legacy systems. We use Koho-nen networks, or self-organizing maps, for the cat-egorization of programs: Programs with similar features are grouped together in atwo-dimensional neighbourhood , whereas dissimilar program...

Following the course set by A. O'D unlaing (1983) has shown that certain properties of nitely generated Thue con-gruences are undecidable in general. Here we prove that many of these undecidability results remain valid even when only nitely generated Thue congruences on a xed two-letter alphabet 2 are considered. In contrast to a construction given by P. Schupp (1976) which applies to groups on...

A conservative, upwind numerical method is formulated for the solution of a two-phase (reactive solid and inert gas) model of deflagration-to-detonation transition (DDT) in granular energetic solids. The model, which is representative of most two-phase DDT models, accounts for complete nonequilibrium between phases and constitutes a nonstrictly hyperbolic system of equations having parabolic de...

taqaddom, a literary scientific, political, social and humour magazine was licensed to publish in 1925, when reza khan, the army commander, came into power. its licence holders were mirza ahmad khan faramarzj and his brother abdurrahman, afetr a two-year del a jurist issue of the magazine was published in 64 pages in sep. 1927. according to abdorrahman faramarzl, the magazine bad been planned t...

Previous studies reported premixed calcium phosphate cements (CPCs) that were stable in the package and form hydroxyapatite (HA) as the product after exposure to an aqueous environment. These cements had setting times of greater than 60 min, which are too long to be useful for some clinical applications. The present study investigated properties of fast-setting HA-forming premixed CPCs that ini...

In this research, the effect of different biopolymers such as polyethylene glycol (PEG) and polyvinylalcohol (PVA) on synthesis and characterization of polymer/cobalt ferrite (CF) nano-composites bymechanical alloying method has been systematically investigated. The structural, morphological andmagnetic properties changes during mechanical milling were investigated by X-ray diffraction (XRD),Fo...

Current study aims to prioritize four-star hotels through atwo-step procedure: firstly, classifying service quality dimensions (SQDs)based on Importance-Performance Analysis and secondly prioritizinghotels based on classified SQDs analysing the results. To reach that aim,the customers of three 4-star hotels were considered and asked to statethe quality of the service they expected to receive pr...

current study aims to prioritize four-star hotels through atwo-step procedure: firstly, classifying service quality dimensions (sqds)based on importance-performance analysis and secondly prioritizinghotels based on classified sqds analysing the results. to reach that aim,the customers of three 4-star hotels were considered and asked to statethe quality of the service they expected to receive pr...