Support for virtual states and deltas between them is useful for a variety of database applications, including hypothetical database access, version management, simulation, and active databases. The Heraclitus paradigm elevates delta values to be \\rst-class citizens" in database programming languages, so that they can be explicitly created, accessed and manipulated. A fundamental issue concern...

Abstract The ties between a society and its local ecosystem can decouple as societies develop replace services such food or water regulation via trade technology. River deltas have developed into important, yet threatened, urban, agricultural industrial centres. Here, we use global spatial datasets to explore how 49 respond four human modification indicators, e.g. population density, across 235...

The apical delta is an intricate system within the root canal and incompletely debridement may affect the long-term prognosis of root canal therapy. The aim of the present study is to investigate the morphologic features of apical deltas in human teeth with micro-computed tomography (micro-CT) using a centreline-fitting algorithm. One hundred and thirty-six apical deltas were detected in 1400 t...

Multi-version concurrency control method has nowadays been widely used in data warehouses to provide OLAP queries and ETL maintenance flows with concurrent access. A snapshot is taken on existing warehouse tables to answer a certain query independently of concurrent updates. In this work, we extend this snapshot with the deltas which reside at the source side of ETL flows. Before answering a qu...

The reactions of 2,4- and 2,5-dihydroxybenzoic acids (dihydroxybenzoic acid, DHBA) with chromium(III) in weak acidic aqueous solutions have been shown to take place in at least two stages. The first stage of the reactions has an observed rate constant k(1(obs)) = k(1)[DHBA] + C and the corresponding activation parameters are DeltaH(1(2,4)) ( not equal) = 49, 5 kJ/mol(-1), DeltaS(1(2,4)) ( not e...

Delta proteins activate Notch through a binding reaction that depends on their extracellular domains; but the intracellular (C-terminal) domains of the Deltas also have significant functions. All classes of vertebrates possess a subset of Delta proteins with a conserved ATEV* motif at their C termini. These ATEV Deltas include Delta1 and Delta4 in mammals and DeltaD and DeltaC in the zebrafish....

This thesis consists of three parts, each of independent interest, yet tied together by the problem of matching with mismatches. In the first chapter, we present a motivated exposition of a new randomized algorithm for indexed matching with mismatches which, for constant error (substitution) rates, locates a substring of length m within a string of length n faster than existing algorithms by a ...