This article discusses educational design-based research (DBR) as an emerging paradigm/methodology in educational enquiry that can be used as a mixed-method, problem-oriented research framework, and thus can act as an alternative to other traditional paradigms/methodologies prominent within the Egyptian context of educational enquiry. DBR is often referred to as a long-term research endeavour and

This paper identifies ways in which conceptual, methodological and technical developments in e-research can contribute to solutions of key questions in learning science research and, in particular, design-based research (DBR). The paper focuses on DBR issues in three major areas: methodology, research process, and dissemination. By mapping DBR issues to the conceptual and technological features...

Attempts to commercialize GaN VCSELs have been unsuccessful to date due to the challenges of manufacturability of DBR mirrors, difficulties associated with current blocking, and the complexity of laser liftoff. The new process flow overcomes all three challenges enabling the manufacturing of IIINitride VCSEL without liftoff and with much reduced complexity and the possibility of on-wafer testing.

Building on a long research tradition (cf. 1), this paper proposes to apply the distinction between data (information stored in the agent’s mind) and beliefs (information accepted as reliable) to belief revision modeling (cf. 2), in order to integrate belief change in the overall epistemic processing of the agent. As a result, a more comprehensive and complex model of epistemic dynamics is form...

The measurement of the tuning speed in fiber Bragg gratings is an increasingly important parameter for characterizing the dynamics of tunable devices. Optical spectrum analyzers and wavelength meters are not suitable due to their slow response for measuring the wavelength shift in time. In this paper we report on a technique for estimating the tuning speed of a fiber Bragg grating which is base...

Ann Brown (1992) and Allan Collins (1992) introduced the term design experiment in 1992 as an innovative approach to educational research. Today, commonly termed design-based research (DBR), the approach itself is still very much being designed. There is a general consensus that DBR standards need to be set by addressing such questions as: What kinds of knowledge should DBR be expected generate...

We present an interferometric setup to write apodized or apodized-chirped Bragg Gratings at any wavelength with the same phase mask and to a precision of 0.1 nm. An encoder for CDMA applications is realized.