This thesis introduces a new model for distributed computation in asynchronous net works the input output automaton This simple powerful model captures in a novel way the game theoretic interaction between a system and its environment and allows funda mental properties of distributed computation such as fair computation to be naturally expressed Furthermore this model can be used to construct m...

A new sigmoid growth equation is presented for curve-fitting, analysis and simulation of growth curves. Like the logistic growth equation, it increases monotonically, with both upper and lower asymptotes. Like the Richards growth equation, it can have its maximum slope at any value between its minimum and maximum. The new sigmoid equation is unique because it always tends towards exponential gr...

D. Richards was supported by NSF 9729847. Thanks to Rajesh Kasturirangan for comments on early drafts and to the Minnesota Supercomputing Institute for providing computing time. We are indebted to Richard Schweickert for a careful reading and detailed comments. Address correspondence and reprint requests to W. Richards, Departement of Brain and Cognitive Science, Massachussetts Institute of Tec...

The New Zealand alpine cave w?t? genus Pharmacus was first described by Pictet & de Saussure (1893) as a monotypic taxon. Three species were added to the Richards in 1972. Here we clarify status and appearance of all known Pharmacus. Based on morphology mtDNA sequences determine that brewsterensis Richards, 1972 is better placed within Notoplectron 1964. We also resolve Isoplectron coch...

Ndapewa Laudika Ithete, Samantha Stoffberg, Victor Max Corman, Veronika M. Cottontail, Leigh Rosanne Richards, M. Corrie Schoeman, Christian Drosten, Jan Felix Drexler,1 and Wolfgang Preiser1 Author affiliations: University of Stellenbosch/National Health Laboratory Service, Tygerberg, South Africa (N.L. Ithete, S. Stoffberg, W. Preiser); University of Bonn Medical Centre, Bonn, Germany (V.M. C...

BACKGROUND Bone staples are an accepted method of fixation in foot surgery. They reduce operating time and trauma in surgical procedures. A variety of memory staples are available but their properties compared to standard staples are not known. We carried out a study comparing two popular types of memory staples and a standard stainless steel staple. METHODS Standardized bone models of metata...

Three methods for the laboratory classification of mycobacteria have been proposed. Runyon (1955) used pigment production and rate of growth to define four groups (numbered 1 to 4). Collins (1962) employed growth at 20°C. and 44°C., resistance to thiosemicarbazone, and growth in a synthetic medium to describe four similar groups (assemblies A to D). Marks and Richards (1963) used morphological,...

For the Weibulland Richards-regression model robust designs are determined by maximizing a minimum of Dor D1-efficiencies, taken over a certain range of the non-linear parameters. It is demonstrated that the derived designs yield a satisfactory solution of the optimal design problem for this type of model in the sense that these designs are efficient and robust with respect to misspecification ...

Abstract This work arises from the need of exploring new features for modeling and optimizing water consumption in irrigation processes. In particular, we focus on flow model unsaturated soils, accounting also a root uptake term, which is assumed to be discontinuos state variable. We investigate possibility accomplishing such optimization by computing steady solutions $$\theta$$ <mml:math xmlns...