Arturo Pizano

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A model and a language for specifying spatial integrity constraints in pictorial databases are presented. Spatial integrity constraints are assertions about the correct behavior of database systems that specify acceptable database states and state transitions. They also serve as restrictions on positions occupied by objects in a picture. The language(More)
Incorporation of 2,3,6-trifluorotyrosine (F(3)Y) and a rhenium bipyridine ([Re]) photooxidant into a peptide corresponding to the C-terminus of the β protein (βC19) of Escherichia coli ribonucleotide reductase (RNR) allows for the temporal monitoring of radical transport into the α2 subunit of RNR. Injection of the photogenerated F(3)Y radical from the(More)
Amino acid radical generation and transport are fundamentally important to numerous essential biological processes to which small molecule models lend valuable mechanistic insights. Pyridyl-amino acid-methyl esters are appended to a rhenium(I) tricarbonyl 1,10-phenanthroline core to yield rhenium-amino acid complexes with tyrosine ([Re]-Y-OH) and(More)
This paper presents a system that allows the automatic generation of graphical user interfaces (GUI) for interactive database applications. The system is intended for novice application developers with limited experience in the design and implementation of graphical user interfaces, and with only a basic understanding of the conceptual database schema. The(More)
INTRODUCTION The World Wide Web (WWW) continues to enjoy phenomenal growth with the promise of facilitating a digital society. Technology continues to evolve, allowing an increasingly peripatetic society to remain " connected " without any reliance upon wires. As a consequence, mobile computing is a growth area and the focus of much energy. Mobile computing(More)
In this paper, we present the key ideas involved in the design and implementation of " WEBTOUR, " a system to record, playback, store, search, and distribute personalized dynamic multimedia annotations on web documents in the form of guided web tours. Using WEBTOUR, web document designers can easily augment the contents of standard web documents by(More)
This paper presents a fast image segmentation algorithm for extracting areas-of-interest (" hotspots ") from video sequences. Because video hotspots, which are the visual analogues of HTML hyperlinks, highly depend on a user's interest , it is very difficult to automatically extract the exact outlines of objects of interest in videos. Our approach of(More)