Dry Friction in the Frenkel-Kontorova-Tomlinson Model: Dynamical Properties

Wearless friction is investigated in a simple mechanical model called Frenkel-Kontorova-Tomlinson model. We have introduced this model in [Phys. Rev. B, Vol. 53, 7539 (1996)] where the static friction has already been considered. Here the model is treated for constant sliding speed. The kinetic friction is calculated numerically as well as analytically. As a function of the sliding velocity it shows many structures which can be understood by varies kinds of phonon resonances (normal, superharmonic and parametric) caused by the so-called "washboard wave". For increasing interaction strength the regular motion becomes chaotic (fluid-sliding state). The fluid sliding state is mainly determined by the density of decay channels of m washboard waves into n phonons. We also find strong bistabilities and coherent motions with superimposed dark envelope solitons which interact nondestructively.Comment: Written in RevTeX, figures in PostScript, appears in Z. Phys.

Land-Use Transport Interaction: State of the Art

This paper investigates innovative approaches to the integration of land-use and transport planning in urban regions. Engineering, economic and social-science based theories and empirical studies are analyzed regarding their ability to explain the interaction between land use and transport - that land use determines traffic flows and that transport infrastructure changes land-use patterns. In addition, this paper provides an overview of the state of the art of computer models for the simulation of land use and transport. Based on these theories and models the effectiveness of policies to influence land use and transport in urban regions is assessed.Urban location theory, transportation research, land use- transport interaction, urban simulation modeling, location choice

From WIL1 to work ready: Evaluating the student-learning continuum, a qualitative study

This paper presents the preliminary findings of an ongoing qualitative study investigating the experiences of students, practitioners, and educators in the placement of students within professional practice and outlines the subsequent implications for professional education. This includes an evaluation of a pedagogical model for work integrated learning (WIL) within the built environment and design disciplines, and its relationship to the student-learning continuum. This research aims to address a gap in current knowledge, which commonly views a student’s ‘transition into’ university and ‘transition out’ into professional practice as independent, static events. This paper argues that, rather than simply moving ‘into’ university and ‘out’ into professional practice, the student instead experiences a threshold transgression continuum. This is where the student and their learning evolves and transforms through the crossing-over between workplace and academia that occurs several times throughout their study. In attempting to better understand what it is for the student to transgress and transform, the role that WIL plays in the transition of student from learner to professional is questioned. Using an inductive approach based on grounded theory, this paper evaluates data extrapolated from a series of qualitative open-ended participant interviews with students, practitioners and academics and is collated and analysed using thematic analysis