Steven Johnston

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In this paper we present the features of a new physical device prototyping platform called Microsoft .NET Gadgeteer along with our initial experiences using it to teach computer science in high schools. Gadgeteer makes it easy for newcomers to electronics and computing to plug together modules with varied functionality and to program the resulting system's(More)
In this paper, we present an approach to detecting novel cyber attacks though a form of program diversification, similar to the use of n-version programming for fault tolerant systems. Building on extensive previous and ongoing work by others on the use of code clones in a wide variety of areas, our Functionally Equivalent Variants using Information(More)
Time series data has been exploited for use with Case Based Reasoning (CBR) in many applications. We present a novel application of CBR that combines intelligent tutoring using Augmented Reality (AR) and prediction. The MonitAR system, presented in this paper, is intended for use as an intelligent guidance system for astronauts conducting complex procedures(More)
DVD-video is becoming more and more popular as the cost of hardware and media falls but the world of technology has moved on since the format was finalised. New and better encoding formats have been produced and there is a possibility that DVD’s will become obsolete just as it becomes mainstream. The MPEG4 derivative DivX;) claims to have the capability of(More)
Vacuum Circuit Breakers (VCBs) are commonly applied to the primary circuit to switch ladle melt furnace (LMF) transformers in melt shop applications that support rolling mill operations. Because of the well-documented phenomenon of switching transients induced on the line of the furnace transformer due to the opening and closing of the VCB, most LMFs in(More)
Vacuum circuit breakers are commonly applied to the primary circuit to switch Ladle Melt Furnaces (LMF) transformers in melt shop applications which support rolling mill operations. Because of the well documented phenomenon of switching transients induced on the line of the furnace transformer due to the opening and closing of the vacuum circuit breaker(More)
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