Donald L. Hung

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This paper presents two types of recurrent neural networks, continuous-time and discrete-time ones, for solving linear inequality and equality systems. In addition to the basic continuous-time and discrete-time neural-network models, two improved discrete-time neural networks with faster convergence rate are proposed by use of scaling techniques. The(More)
The molecular basis of how pathogenic bacteria cause disease has been studied by blending a well-developed genetic system with X-ray crystallography, protein chemistry, high resolution electron microscopy, and cell biology. Microbial attachment to host tissues is one of the key events in the early stages of most bacterial infections. Attachment is typically(More)
P pili are important virulence factors in uropathogenic Escherichia coli. The Cpx two-component signal transduction system controls a stress response and is activated by misfolded proteins in the periplasm. We have discovered new functions for the Cpx pathway, indicating that it may play a critical role in pathogenesis. P pili are assembled via the(More)
PapD is the periplasmic chaperone required for the assembly of P pili in pyelonephritic strains of Escherichia coli. It consists of two immunoglobulin-like domains bisected by a subunit binding cleft. PapD is the prototype member of a super family of immunoglobulin-like chaperones that work in concert with their respective ushers to assemble a plethora of(More)
PapD is an immunoglobulin-like chaperone that mediates the assembly of P pili in uropathogenic strains of Escherichia coli. It binds and caps interactive surfaces on pilus subunits to prevent their premature associations in the periplasm. We elucidated the structural basis of a mechanism whereby PapD also interacts with itself, capping its own subunit(More)
In image processing, pattern recognition, and computer vision, one of the most powerful techniques for feature extraction is to use moments. Real-time applications of this method, however, have been prohibited due to the intensive computation encountered in calculating the moments. One solution to this problem is to adopt specially designed hardware(More)