few, if any, studies have investigated the effect of professional experience as a rater variable and type of assessment as a task variable on raters’ criteria in the assessment of speech acts. this study aimed to explore the impact of nonnative teachers’ professional experience on the use of criteria in monologic and dialogic assessment of 12 role-plays of 3 apology speech acts. to this end, 60...

there are different studies in urban literature on the determinants of urban growth, from the theoretical and empirical points of view. the most completed theoretical model is henderson model (1988, 1997, and 1999), which is tested by some empirical studies. as henderson model shows, the set of national product, specialization and technological progress are the determinants of urban growth. usi...

Rapid advances in computer and geospatial technology have made it increasingly possible to design and develop urban models to efficiently simulate spatial growth patterns. An approach commonly used in geography and urban growth modelling is based on cellular automata theory and the GIS framework. However, the behaviour of cellular automaton (CA) models is affected by uncertainties arising from ...

information and communication technologies are the most recent scientific achievements of mankind's ability seems to have much to offer society and are expected to be useful in solving the problems of human society. many around the world believe that accelerates the process of adjustment in the exchange of knowledge and information through information and communication technologies a vital role...

The aim of this work was to develop a model suited for detailed studies of aerosol dynamics, gas and particle phase chemistry within urban plumes, from local scale (1× 1 km2) to regional scale. This article describes and evaluates the trajectory model for Aerosol Dynamics, gas and particle phase CHEMistry and radiative transfer (ADCHEM). The model treats both vertical and horizontal dispersion ...