The purpose of this study is to investigate the effects of asynchronous computer-mediated versus conventional corrective feedback on learners' writing accuracy. Three groups of learners took part in the study: asynchronous feedback group, conventional feedback group, and a control group. Asynchronous feedback group students received explicit feedback on the targeted structure via e-mail, while...

The role of feedback control in software and information system development has traditionally focused on a milestone plan to deliver a pre-specified set of capabilities within a negotiated budget and schedule. One of the most powerful approaches available for controlling traditional software projects is called the Earned Value system. However, the Earned Value Management process is generally go...

The design procedure of low-sensitivity second-and third-order class-4 Sallen and Key active resistance-capacitance (RC) allpole filters, using impedance tapering, has already been published. There a ladder structure in the positive feedback loop of an operational amplifier was used. In this paper desensitization using impedance tapering is applied to class-3 circuits with negative feedback ref...

Positive feedback is a process that occurs in a feedback loop in which the effects of a small disturbance on a system include an increase in the magnitude of the perturbation.[1] That is, A produces more of B which in turn produces more of A.[2] In contrast, a system in which the results of a change act to reduce or counteract it has negative feedback.[1][3] Mathematically, positive feedback is...

We would firstly like to credit Bernard et al. [1] for their interesting research into such a topical aspect of medical education currently, one which we can relate to personally as students who share an interest in medical education. The role of feedback in promoting student reflection and subsequent improvement in the setting of formative objective structured clinical examinations (OSCEs) is ...

Many round-based chaotic image encryption algorithms employ the permutation-diffusion structure. Schemes using this structure have been found insecure when the iteration round is equal to one and the secret permutation of some existing ones can be recovered even a higher iteration round is adopted. In this paper, we present a single round permutation-diffusion chaotic cipher for gray image, in ...