Maritime transport in the Italian logistics market

In this paper, the role of Italian shipping firms in the logistic services market is defined in light of major changes under way. The first part analysed the structural characteristics of the supply and demand for logistic and transport services, in which a situation of substantial weakness emerged. This situation has favoured the large-scale entry of foreign operators on the Italian market which perceive Italy as a key node within the international scenario of transport and logistics. The second part of the paper focused on the analysis of individual areas in Italian shipping and their capacity to differentiate service by supplying value added logistic services beyond transport. The analysis showed a position of substantial marginality for Italian shipping, a position which gives rise to several doubts regarding its capacity to face the challenge of international competition successfully.     

The role of training in developing entrepreneurship: the case of shipping in Italy [1]

This paper examines the role of management training on entrepreneurial development paths of a sample of small and medium-sized Italian shipping enterprises. Starting with an analysis of evolutionary dynamics at the international level and highlighting the peculiarities of shipping in Italy, this paper reveals teh importance of firm-specific factors, compared with country-specific factors, in determining the competitiveness of shipping companies. In such enterprises the entrepreneur's role and his/her level of entrepreneurial culture play an important part in conditioning developing paths. On the basis of the results from an empirical survey, thee study in question suggests several implications for implementing policies aimed at increasing the level of entrepreneurial culture by means of selective, diversified interventions in management training so as to develop the factors required by the firm to recover competitiveness.     

Influence of coordinated traffic lights parameters on roadside pollutant concentrations

The paper examines the effects of coordinated traffic lights on CO and C₆H₆ roadside concentrations in an urban area of Palermo in Southern Italy. Traffic loop detectors and one pollution-monitoring are used to collect data for use in DRACULA traffic microsimulator software. CO and C₆H₆ roadside concentrations associated with varying cycle and offset times of the coordinated traffic lights are estimated using a neural network. Two functions were set up describing the relations of pollutant concentrations in term of cycle and offset time.     

PID Controller Modelling and Optimization in Cr Systems with Standard and Reduced Accumulators

The proportional-integrative-derivative (PID) controller and the pressure control valve of a Common Rail system are modelled by taking into account electronic, electrical, hydraulic and mechanical aspects. A fully predictive model of the injection apparatus is realized and validated by means of comparison with experimental data. The effects of the PID parameters on the injection system dynamics are illustrated and discussed on the basis of model results, which refer to steadystate and transient working conditions. The influence of the accumulator size on the rail pressure time history is investigated when the rail volume is dramatically reduced (up to 2.5 cm³). In particular, the effect of the large rail pressure drop that occurs at the end of the main injection for Minirail layout solutions is examined when after injections are implemented. An objective is to try to determine possible suitable values of the PID controller parameters and of the pressure-sensor sampling-frequency for rails of reduced size.     

Maritime transport in the Italian logistics market

In this paper, the role of Italian shipping firms in the logistic services market is defined in light of major changes under way. The first part analysed the structural characteristics of the supply and demand for logistic and transport services, in which a situation of substantial weakness emerged. This situation has favoured the large-scale entry of foreign operators on the Italian market which perceive Italy as a key node within the international scenario of transport and logistics. The second part of the paper focused on the analysis of individual areas in Italian shipping and their capacity to differentiate service by supplying value added logistic services beyond transport. The analysis showed a position of substantial marginality for Italian shipping, a position which gives rise to several doubts regarding its capacity to face the challenge of international competition successfully.     

A new method for measuring the quality of circulation on motorways

The paper presents a method of measuring the quality of circulation worked out by processing the data derived from 155, 000 vehicle passages over two sections of two-lane, divided-carriageway motorway of identical geometric characteristics. The mass of observed data was broken down into a sequence of 293 periods of constant flow rate, each characterized by a specific flow rate and percentage of heavy vehicles. The percentage of vehicles passing on lane No. 1 and the suitable transformations of the characteristics of the speed and time headway processes on the two lanes during each of the periods gave rise to a vector of 15 components representing the circulation conditions during that period. By performing a linear transformation of the vectors for the 293 constant flow rate periods, it was possible to single out three non-correlated variables, called the “principal components”, which accounted for 75% of the total variance observed for the 15 components, and in turn permitted the representation, without excessive distortion, of the observed circulation conditions within a three-dimensional space by means of a swarm of 293 points. Analyzing the manner in which the three principal components varied jointly within the swarm, a total of four zones were identified, representing respectively free flow, stable flow, unstable flow and forced flow. Moreover, it was possible to identify the numerical value of the quality of circulation with the first principal component, which by itself accounted for 55% of the total variance. This component showed very strong correlation with the flow rate and the percentage of heavy vehicles, and thus permits among other things the mutual comparison of the conditions of circulation caused by different flow rates and compositions.