This paper gives an overview of theories on interregional migration. Conventional theories within economics and geography are discussed, and some new ideas are introduced. For example, the value of physical capital in a welfare society is now so large that it will slow down net migration. Finally, contemporary progress in research is discussed. New methods will make it possible to understand ma...

This paper aims to compare the descriptive and predictive power of two classes of statistical estimation models for multimodal network flows, viz. the logit model and the neural network model. The application concerns a large data set on inter-regional European freight flows for two commodity categories (food and chemicals). After an exposition of policy issues, methodological and modelling que...

this research aims to explore the observance of syllable contact law (scl) in persian simple words. to achieve this aim, 4661 contacts were extracted from 9553 simple polysyllabic words. results show that in 45% of the syllable boundaries the sonority drops from the coda of the first syllable to the onset of the next one. also in 68% of the consonant contacts in pure persian words scl is observ...

this article is concerned with the static analysis of structural cables used in railway overheads. structural analysis computer program named ansys is used for analysis. two effects are considered in the analysis. first one is the bending behavior effect of cables. beam188 in addition to link10 and link180 is used to see the difference in case of additional bending effect. besides, link10 and l...

Interregional technology convergence is one of the necessary conditions for coordinated development regional economy, and constructing cross-regional industry innovation strategic alliance (ITISA) main means to realize interregional convergence. This paper investigates whether establishment these alliances can improve technological ability ITISA its members how are distributed geographically ac...