obviously, learning environment plays a crucial role in how second language or a foreign language is learned. in this regard, the importance of interaction for l2 learning has been emphasized. the current study investigated teachers' interactional moves (im) and learners' uptake in efl classrooms systematically. to meet this end, four efl contexts of speaking and listening courses for english m...

We explore the frequency and impact of misunderstandings in an existing corpus of tutorial dialogues in which a student appears to get an interpretation that is not in line with what the system developers intended. We found that this type of error is frequent, regardless of whether student input is typed or spoken, and that it does not respond well to general misconception repair strategies. Fu...

in this paper a new problem of three stage disassembly-assembly scheduling is introduced and reviewed. this problem, which was arisen from the aviation industry characteristics, is a generalization of the two stage assembly scheduling problem. products (helicopters) in the aviation industry return to assembler for annual overhaul repair services. in the first stage helicopters are disassembled ...

The present study deals with a robot safety system composed of standby robot units and inbuilt safety unit. When the main operative unit fails, it is replaced by the standby robot unit available in the system. The concept of reboot delay is also incorporated in this study according to which the robot unit is rebooted if it is not successfully recovered. The recovery and reboot times of failed u...

Introduction: The low regeneration of bone in defective bones causes therapeutic problems. Various strategies to assess the healing of bone defects have been used which they include histological and histo-chemical analysis in an invasive study. The purpose of this study was to determine the ultrasonic parameters of bone as a promising noninvasive technology for assessing bone repair process. Ma...

purpose : the goal of this study was evaluation of the incidence rate of posttraumatic endophthalmitis, its clinical features and probable risk factors in repaired open globe injuries. methods : in this retrospective case series, surgical and medical records of 600 patients with open globe injury were reviewed. patients who underwent primary repair (as soon as possible) in khatam-al-anbia eye h...

A distributor segment has failure rate and repair time which decide mean up time (MUT) and mean down time (MDT). Usually the reliability analysis is based on exponential failure and repair laws. Certain values of repair times are smaller which may be neglected. This is known as repair time omission. Omitted repair time may be fixed. Repair time omitted in turn will affect the basic reliability ...

Sustainable development is a Controversial concept which has been considered over the three decades. It is comprehensive development and includes all of dimensions as “economic’’, “social’’ and ‘‘environmental’’. In economic objective, it requires substantial economic change that can be brought about by investment and trade. They are effective factors of sustainable developm...

In September 2015, the international community came together to agree on the 2030 Agenda for Sustainable Development, a plan of action for people, the planet, and prosperity. Ambitious and far-reaching as they are, they are built on three keystones: the elimination of extreme poverty, fighting climate change, and a commitment to fighting injustice and inequality. Critical to the achievement of ...