abstract textbooks play an important role in english language teaching (elt), particularly in the english as a foreign language (efl) context where it provides the primary linguistic input. the present research was an attempt to comparatively evaluate the touchstone series in terms of compliment and complaint speech acts. four touchstone textbooks (book 1, book 2, book 3, and book 4) were selec...

abstract the present study aims to evaluate efl course contents used in language schools and institutes in teh-ran. to that end, 230 participants in tehran were conveniently sampled. at the outset of the study, two questionnaires were given to all groups, and according to their responses, the data were analyzed. each of the questionnaires was given to participants individually. each group had...

2014 An overview is given describing the physical basis of ultrasonic reflectivity as it relates to solid material characterization. The examples given illustrate critical angle reflection, Rayleigh and Lamb waves, and crystal orientation via reflection measurements. Revue Phys. Appl. 20 (1985) 377-381 JUIN 1985, PAGE Classification Physics Abstracts 43.20

This paper explores the feasibility of detecting damage within structures such as air foils by application of eddy current based techniques and reduced order modeling. To identify the geometry of a damage, an optimization algorithm is employed which requires solving the forward problem numerous times. Therefore, the forward algorithm must be solved with extremely fast and accurate solution meth...