one of the most problematic areas in foreign language learning is collocation. it is often seen as arbitrary and an overwhelming obstacle to the achievement of nativelike fluency. current second language (l2) instruction research has encouraged the use of collaborative output tasks in l2 classrooms. this study examined the effects of two types of output tasks (editing and cloze) on the learning...

background: the aim of this work was to study the output factors for linac using different ionization chambers and build up caps. materials and methods: output factors were measured for open square fields (3 × 3 cm to 40 × 40 cm) defined by collimator jaws for 6 and 15 mv photon beams from a varian clinac 2100c accelerator were measured. the measurements in air were performed using compact cyli...

this paper works on the concept of flatness and its practical application for the design of an optimal transient controller in a synchronous machine. the feedback linearization scheme of interest requires the generation of a flat output from which the feedback control law can easily be designed. thus the computation of the flat output for reduced order model of the synchronous machine with simp...

this study was designed to find which one of the three different presentations, i.e. input, input-output, and output-input, will be more effective in iranian efl learners' vocabulary acquisitions. to this end, first 54 out of 64 female students, aged from 19 to 23 years, with an average of 21, were selected out of starter-level efl learners at the university of tarbiat moalem in bandar abb...

1. Overview Output-output correspondence (OOC) constraints, constraints which demand correspondence between independently occurring surface forms, have recently been added to the set of constraint types invoked in much OT work. In this paper we examine some of the better-known arguments originally adduced in support of OOC constraints, and argue that adoption of such a powerful mechanism is not...

Article history: Received 8 September 2008 Received in revised form 23 February 2009 Accepted 1 May 2009