The Sudbury Neutrino Observatory

The Sudbury Neutrino Observatory is a second generation water Cherenkov detector designed to determine whether the currently observed solar neutrino deficit is a result of neutrino oscillations. The detector is unique in its use of D2O as a detection medium, permitting it to make a solar model-independent test of the neutrino oscillation hypothesis by comparison of the charged- and neutral-current interaction rates. In this paper the physical properties, construction, and preliminary operation of the Sudbury Neutrino Observatory are described. Data and predicted operating parameters are provided whenever possible.Comment: 58 pages, 12 figures, submitted to Nucl. Inst. Meth. Uses elsart and epsf style files. For additional information about SNO see http://www.sno.phy.queensu.ca . This version has some new reference

UNDECIDABILITY OF PDL WITH L=(A2I/I-GREATER-THAN-OR-EQUAL-TO-O)

The ability of whole ecosystems to respond to selection has recently been demonstrated in artificial selection experiments, (Swenson et al 2000a, Swenson et al 2000b). As well as having wide-ranging practical applications, this result significantly broadens the application of theoretical concepts of the mechanisms of heritability and variation in biological systems. Simulation models have the potential to be useful tools for the investigation of these issues. Whilst related simulation work exists (Ikegami 2001, Wilson 1992), ecosystem-level selection itself has yet to be modelled. This paper presents such a model, in which ecosystems are modelled as generalised Lotka-Volterra systems and are subject to a generational selection process. A positive response to selection for diversity is demonstrated, with the only sources of variation being sampling errors arising when 'offspring' ecosystems are produced

Comparisons of Human-Human Trust with Other Forms of Human-Technology Trust

We explore the applications of our conceptualization of human-robot trust and human-automation trust, and develop a theoretical model for wider human-human trust. The exploration of similarities and differences between trust in robots and general automation aid in the establishment of our foundation for this comprehensive model of interpersonal trust. Our proposed model is described and its implications for research, design, and applications in applied behavioral research are adumbrated