George Francis

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To realise fish-like swim patterns by a robotic system poses tremendous challenges. This requires fully understanding of fish biomechanics and the way to mimic it. This paper presents our research toward the sensor-based control of autonomous robotic fish that can swim in a 3D unstructured environment, based on observations of fish swim behaviours. Our(More)
Interactive computer graphics can provide new insights into the objects of pure geometry, providing intuitively useful images, and, in some cases, unexpected results. Interactive computer graphics systems have opened a new era in the visualization of pure geometry. We demonstrate the fruitful relationship between mathematics and the discipline of computer(More)
Distributed scene graphs are important in virtual reality, both in collaborative virtual environments and in cluster rendering. In Myriad, individual scene graphs form a peer-to-peer network whose connections filter scene graph updates and create flexible relationships between scene graph nodes in the various peers. Modern scalable visualization systems(More)
Antibodies raised in rabbits against pure rat T-kininogen did not cross-react with Ile-Ser-Bradykinin, bradykinin, nor with kininogens from other mammalian species. They presented a 1 to 15% cross-reaction with pure rat HMW kininogen, depending on the quantity of HMW kininogen. A direct radioimmunoassay for rat T-kininogen in plasma was developed and it(More)
1. Extraction of the pleural and parenchymal regions of bovine lungs with salt and organic solvents gave powders that contained glycoproteins in addition to collagen and elastin. The contents of these glycoproteins (g/100 of powder) was 4% in pleura and 15.5% in parenchyma. 2. Attempts were made to purify these glycoproteins fromboth tissues by various(More)
1. The contents of the fibrous proteins collagen and elastin in the pleural and parenchymal regions of bovine lungs were determined. The collagen content was approx. 70% (g/100g of salt-extracted defatted powder) in each tissue, and the elastin content was 28% in pleura and 13.5% in parenchyma. 2. Purification of the insoluble collagen from the pleura and(More)
The covalent structure of the first 111 residues from the N-terminus of peptide alpha1(II)-CB10 from bovine nasal-cartilage collagen is presented. This region comprises residues 552-661 of the alpha1(II) chain. The sequence was determined by automated Edman degradation of peptide alpha1(II)-CB10 and of peptides produced by cleavage with trypsin and(More)
The mathematical process of everting a sphere (turning it inside-out allowing self-intersections) is a grand challenge for visualization because of the complicated, ever-changing internal structure. We have computed an optimal minimax eversion, requiring the least bending energy. Here, we discuss techniques we used to help visualize this eversion for(More)
We describe a collaboration between mathematicians interested in visualizing curved three-dimensional spaces and researchers building next-generation virtual-reality environments such as ALICE, a six-sided, rigid-walled virtual-reality chamber. This environment integrates active-stereo imaging, wireless motion-tracking and wireless-headphone sound. To(More)