Food solidarity economy: evaluating transition community initiatives in Friuli Venezia Giulia region

Climate change, ecological challenges, and economic and social crises imply paradigmatic and structural innovations. In the effort to drive transition toward sustainability, local communities often take the lead, mobilize support, and organize initiatives based on the principles of solidarity economy. Our study presents a qualitative evaluation and comparison of three local bottom-up initiatives from Friuli Venezia Giulia, a Northern Italian region, each following alternative and unique models of production and consumption of wheat and flour. The reconstruction of the transition paths of the experiences, together with documental analysis and interviews, allowed us to deduce the influence of alternative approaches and subsequent degree of effectiveness in building a community and driving it toward sustainability.

Eye-Tracking Evaluation of Exit Advance Guide Signs in Highway Tunnels in Familiar and Unfamiliar Drivers

As a component of the traffic control plan, traffic signs on highways offer drivers necessary information. Unfortunately, many signs are unfamiliar to or misunderstood by drivers, especially when lacking a setting method; this includes exit advance guide signs in tunnels. These are generally set in roadbed sections, but space limitations in tunnels dictate that they must be set differently. To evaluate the effect of the setting method, an experiment was designed and conducted, during which the eye movements of 44 drivers with different familiarity levels were tracked. Twenty-two of the drivers had not previously participated in any experiment involving exit advance guide signs in highway tunnels, while 22 of them had. Time period data were analyzed, including data from before the sign appeared, when it appeared, and when it disappeared. Based on area division and Markov theory, attributes related to gaze transition were obtained, including one- and two-step gaze transition probabilities and area gaze probabilities. The results showed that gaze transition was confirmed to be significantly different between the three periods and between the drivers. Features extracted from eye movement characteristics, gaze transition paths, and gaze areas demonstrated that visual attention is more dispersed in familiar drivers during the lane-change intention period. Therefore, signs should be placed on the left wall of the highway tunnel.

Improvements to the use of the Trajectory-Adaptive Multilevel Sampling algorithm for the study of rare events

The Trajectory-Adaptive Multilevel Sampling (TAMS) is a promising method to determine probabilities of noise-induced transition in multi-stable high-dimensional dynamical systems. In this paper, we focus on two improvements of the current algorithm related to (i) the choice of the target set and (ii) the formulation of the score function. In particular, we use confidence ellipsoids determined from linearised dynamics in the choice of the target set. Furthermore, we define a score function based on empirical transition paths computed at relatively high noise levels. The suggested new TAMS method is applied to two typical problems illustrating the benefits of the modifications.