Representing knowledge in codified forms is transformative of ones orientation to that knowledge. We trace the emergence of a routine for knowledge acquisition and its consequences for participants. Over time, participants in the earth science project GEON, first learned about ontologies and then learned how to create them. We identify three steps in the routine: understanding the problematic o...

Results from Chandra observations of the two nearest, powerful radio galaxies are summarised.

The nature of the obscuring material in active galactic nuclei is still uncertain. Although some sources, such as Cygnus A, show evidence for a geometrically thick “torus” as originally suggested, recent work on the radiation-driven warping instability discovered by Pringle suggests that obscuration by thin, warped disks may play a crucial role in AGN.

growth traits, yield and fruit quality in ‘synda’ tomato were compared with those in tomatoes grafted onto either ‘king kong’ rootstock or onto their own rootstocks, (trained as single or double stem), and at two fruit thinning levels, of: no thinning or thinned to five fruits per truss. the data related to crop growth rate (cgr), relative growth rate (rgr), net assimilation rate (nar), leaf ar...

This article proposes a 3D object classification approach based on volumetric parts, where Superquadricbased Geon (SBG) description is implemented for representing the volumetric constituents of 3D object. In the approach, 3D object classification is decomposed into the constrained search on interpretation tree and the similarity measure computation. First, a set of integrated features and corr...

Quantum Gravity admits topological excitations of microscopic scale which can manifest themselves as particles — topological geons. Nontrivial spatial topology also brings into the theory free parameters analogous to the θ-angle of QCD. We show that these parameters can be interpreted in terms of geon properties. We also find that, for certain values of the parameters, the geons exhibit new pat...