Simon Johnston

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Building an enterprise-scale software system is a complex undertaking. Despite decades of technological advances, the demands imposed by today’s information systems frequently stretch to breaking point a company’s ability to design, construct, and evolve its mission-critical software solutions. In particular, few new systems are designed from the ground up.(More)
A. W. Brown M. Delbaere P. Eeles S. Johnston R. Weaver Creating service-oriented architecture (SOA) solutions means rethinking the practices currently in use to build systems, reconsidering the skills in an organization, and redefining the ways in which team members collaborate. A service orientation contributes to the development of solutions that are(More)
Many extensions of the standard model of particle physics suggest that neutrinos should be Majorana-type fermions-that is, that neutrinos are their own anti-particles-but this assumption is difficult to confirm. Observation of neutrinoless double-β decay (0νββ), a spontaneous transition that may occur in several candidate nuclei, would verify the Majorana(More)
The current growth of neuron technology is reflected by the increasing focus on this research area within the European research community. One topic is the implementation of neural networks (NNs) onto silicon. FPGAs provide an excellent platform for such implementations. The development of NNs has led to multiple abstractions for various generations. The(More)
A. W. Brown S. Iyengar S. Johnston Models, modeling, and model transformation form the basis for a set of software development approaches that are known as model-driven development (MDD). Models are used in reasoning about a problem domain and the corresponding solution domain for some area of interest. In this paper, we explore model-driven approaches to(More)
U Us si in ng g S Se er rv vi ic ce e-O Or ri ie en nt te ed d A Ar rc ch hi it te ec ct tu ur re e a an nd d C Co om mp po on ne en nt t-B Ba as se ed d D De ev ve el lo op pm me en nt t t to o B Bu ui il ld d W We eb b S Se er rv vi ic ce e A Ap pp pl li ic ca at ti io on ns s A A R Ra at ti io on na al l S So of f t tw wa ar re e W W h hi it te e P Pa ap(More)
We present strong observational evidence for a relationship between the direction of a pulsar’s motion and its rotation axis. We show carefully calibrated polarization data for 25 pulsars, 20 of which display linearly polarized emission from the pulse longitude at closest approach to the magnetic pole. Such data allow determination of the position angle of(More)
J. B. Albert,1 M. Auger,2 D. J. Auty,3 P. S. Barbeau,4 E. Beauchamp,5 D. Beck,6 V. Belov,7 C. Benitez-Medina,8 J. Bonatt,9,4 M. Breidenbach,10 T. Brunner,4 A. Burenkov,7 G. F. Cao,11 C. Chambers,8 J. Chaves,4 B. Cleveland,5,* S. Cook,8 A. Craycraft,8 T. Daniels,9 M. Danilov,7 S. J. Daugherty,1 C. G. Davis,12 J. Davis,4 R. DeVoe,4 S. Delaquis,2 A. Dobi,12 A.(More)