the decorative patterns of islamic pottery have widespread diversity including floral, geometric, inscriptional, animals and human patterns. beside these patterns, there is a group of composed animals including harpies, sphinxes, griffins etc that despite of their few presences, are among the most beautiful and most numinous patterns in islamic pottery. this paper intend to survey different asp...

in the islamic era, mausoleums were considered as the most important after mosques. constructing these buildings dates from the fourth century after hijrah, coinciding with the establishment of the earlier post -islamic dynasties in east and north east of iran. this tradition continued in later islamic periods in two basic rectangular and tomb tower types. the significant point about these buil...

Learning mathematics involves mastering specific forms of social practice. In this chapter, we describe socially situated, interactional processes involved with collaborative learning of mathematics online. We provide a group-cognitive account of mathematical understanding in an empirical case study of an online collaborative learning environment called Virtual Math Teams. The chapter looks clo...

Despite the ubiquitous nature of PowerPoint, little research informs the practice of using presentation software to display textual information to accompany a presentation. The vacuum of empirically tested best practices has been largely filled with guidelines that, while intuitively logical, have little theoretical grounding. The present study examines the effect of providing text visuals, lim...