A methodology for design based research (DBR) into effective development and use of Multi-User Virtual Environments (MUVE) in vocational education is proposed. It blends software development with DBR with two theories selected to inform the methodology. Legitimate peripheral participation LPP (Lave & Wenger, 1991) provides a filter when thinking about vocational education because moving towards...

Focused ion beam (FIB) milling is an emerging technology that enables fast, reliable and well-controlled nanometer-size feature definition. Since the method involves physical removal of material by a beam of ions, the technique can be adapted and optimized almost for any material system. Recently we have reported on an optimized approach of FIB nano-structuring, which enabled patterning of DBR ...

We demonstrate the multifolding Origami manufacture of elastically-deformable Distributed Bragg Reflector (DBR) membranes that reversibly color-tune across the full visible spectrum without compromising their peak reflectance. Multilayer films composed of alternating transparent rubbers are fixed over a 300 μm wide pinhole and deformed by pressure into a concave shape. Pressure-induced color tu...

This paper presents an analytic approach to spontaneous emission in resonators with distributed Bragg reflectors (DBR’s). The foundation of our analysis is the hard mirror (or penetration depth) approximation, which we extend to radiation with both angular and frequency distributions. This has allowed us to derive approximate analytic expressions for the divergence angle of the spontaneous emis...

In the past, many production-scheduling methods were developed to achieve high due-date and short manufacturing lead times performance. Among them, DRUMBUFFER-ROPE (DBR) has been recognized as one of the excellent solutions. However, there are some implementation constraints (e.g., time buffer determination, setup ratio evaluation, non-CCR subordination etc.) limit its implementation performanc...

Light-trapping structures are more demanding for optimal light absorption in thin film silicon solar cells. Accordingly, new design engineering of solar cells has been emphasized and found to be effective to achieve improved performance. This paper deals with a design of thin film silicon solar cells and explores the influence of bottom grating and combination of top and bottom (dual) grating a...

It is shown theoretically that the feedback sensitivity of Distributed Bragg Reflector laser diodes with low-loss section decreases length and also can be decreased by detuning from peak. The effect not only due to a change in effective linewidth enhancement factor, but cavity length. results applied coupled on one side or more ring resonators Such lasers have very weak sensitivity.