Navigation Patterns in Ederly During Multitasking in Virtual Environnment

Cognitive assessment and screening can be realized with virtual environments (VE). These VE reproduce ecological situation and give an overview of participants difficulties through scoring systems. The most variables used to qualify participants performance are number of errors and time completion. These variables are link to cognition and navigation skill in VEs. We assessed navigation of adult and elderly in a multitasking VE. Navigation patterns were elaborate with diagram to visually detect differences between the two age groups. Elderly have poorer performance than adults

Influence of reinforcement type on macrocrack propagation under sustained loading in steel fibre-reinforced concrete

To meet the growing challenges of sustainability, it is necessary to control and anticipate the cracking problems of structures un- der sustained loadings. At the structural level, very little informa- tion is available regarding the combined effect of SFRC and rein- forcement under sustained exural loading. This paper presents the results of four exural creep tests on large steel bre-rein- forced concrete beams reinforced with bres only or in combina- tion with unbonded/bonded prestressing strands or traditional re- inforcing bars. The main objective was to assess the in uence of the reinforcement type on crack propagation, crack openings and compliance evolution in SFRC under sustained loading. The re- sults show that the driving mechanism behind crack propagation is the same for all beams, regardless of reinforcement type, and is therefore governed by type of bre concrete