OBJECTIVE To evaluate the effects of recasting on the biocompatibility of a commercially available Ni-Cr alloy. METHODS The alloy tested was cast and subsequently recast four more times. For each cast condition, 24 disk shaped specimens were fabricated (5 mm in diameter, 0.5 mm in thickness). All the recasting was performed without adding new alloy. After the first cast and following each rec...

Based on the controversial beliefs among L2 teachers about effective corrective feedback (CF) strategies, recast and prompts as 2 kinds of CF have drawn the attention of L2 researchers(e.g., Braidi, 2002; Iwashita, 2003; Loewen & Philp, 2006; Panova & Lyster, 2002; Sheen, 2004). Despite these numbers of studies, debate continues to exist about their usefulness as a CF technique. Whereas recasts...

This study investigated the possible relationship between educational context and English Language Teaching (ELT) teachers’ corrective feedback preference. To this end, 42 Iranian EEFL teachers from some private language institutes and 39 Iranian EFL teachers from different schools in Shiraz, Iran participated in the study. The Questionnaire for Corrective Feedback Approaches (QCFAs) was ...

With the development of MEMS, machining demand and requirements for difficult-to-machine metal micro parts are getting higher. Microelectric discharge is an effective method to process metals. However, recast layer caused by high temperatures in microelectric affects properties machined materials. Here, we propose wire electrochemical micro-machining (WECDMM) develop a new electrolyte system, w...

recent interaction studies havefocused on the relationship between interactional feedback and l2 development.despite the large body of knowledge in this regard, few studies have examinedlearners’ preferences for interactional feedback. besides, different findingshave been reported concerning learners’ preferences for feedback and none hasexamined the factors accounting for the variation in the ...

We propose an end-to-end distributionally robust system for portfolio construction that integrates the asset return prediction model with a optimization model. also show how to learn risk-tolerance parameter and degree of robustness directly from data. End-to-end systems have advantage in information can be communicated between decision layers during training, allowing parameters trained final ...

Abstract Micromachining techniques are being used regularly in various engineering and production sectors such as Micro Electromechanical Systems, Aerospace, Automotive, Electronics Biomedical industries. For Laser Beam Micromachining, highly energized laser beam is focused on a small region of the workpiece surface. As result, it heated up rapidly to sufficiently high temperatures, then materi...