Publication and other forms of selection biases pose a threat to the validity of meta-analysis. Funnel plots are usually used to detect such biases; asymmetrical plots are interpreted to suggest that biases are present. Using 198 published meta-analyses, we demonstrate that the shape of a funnel plot is largely determined by the arbitrary choice of the method to construct the plot. When a diffe...

Nowadays, waste production is increased due to the growth of technology and excessive use of natural resources as well as production of new chemicals, among which the hazardous wastes are no exception of that stabilization and solidification method is one of the hazardous waste management methods through which the waste materials are stabilized and confined. High flexibility for various polluta...

We consider an output regulation problem for a single input single output system with dynamics described by the heat equation on some bounded domain Ω ⊂ R with sufficiently smooth boundary. The input is formed by Neumann boundary control, the output is the surface integral of the state at the boundary. We show that the funnel controller can be applied to this system in order to track a given ou...

We consider bistable reaction-diffusion equations in funnel-shaped domains of RN made up straight parts and conical with positive opening angles. study the large time dynamics entire solutions emanating from a planar front part such domain moving into part. show dichotomy between blocking spreading, by proving especially some new Liouville type results on stable semilinear elliptic whole space ...

product innovation success has very much to do with the development of models ormetaphors that are able to guide actors. one can observe two traditions in thisregard: rational and non-rational models. apparently in the former the model, suchas “development funnel”, is regarded as a mechanism and rigid applicable, picturinginnovation as an orderly, goal-oriented, value-neutral, and systematic pr...