This title brings together a variety of papers presented at the 9th annual Meso meeting in 2007. The topics selected for Meso 2007 are designed to illustrate the relation of thresholds to multiscaling:

Flow through capillary tubes in contrast to pipes
Laminar and turbulent flow transition
Heat convection of thin wires in contrast to cylinders
Electrical conductance of macro- and nano-circuits
Rubbery and glassy polymers
Single- and poly-crystal behavior
Strength of wires and round cylindrical bars
Uni-axial and multi-axial material: linear and non-linear response
Thin and thick plate behavior
Brittle and ductile fracture
Small and large crack growth behavior
Low and high temperature effects
Local and global material property characteristics
Small and large bodies: size and time effects
Specimen and structure