neric mapping framework at the schema level to address the problem of schema interoperability Providing a formalism for developing a generic, extensible, and semi-automated mapping A semi-automatic tool for schema mapping. at the University of Washington in Seattle, where he founded the database group. on Clio, the first semi-automatic tool for heterogeneous schema mapping. Keywords: data integ...

The evolution of a gas shell, swept by the supernova remnant of a massive first generation star, is studied with H2 and HD chemistry taken into account and with use of a semi-analytical approximation to the dynamics. When a first-generation star, formed in a parent pregalactic cloud, explodes as a supernova with explosion energy in the range of 10erg− 10 erg at redshifts of z = 10− 50, H2 and H...

Three mechanisms-cellular automata, finite automata , and L-systemsfor generat ing static patterns are compared. Matrix subst itution systems, nondeterministic extensions of iterative matrix homomorphisms, are also introduced and shown to be equivalent to finite automata. Two different ways for taking the limit of a sequence of finite resolution patterns produced by any of the mechanisms are st...

one of the most important issues that faced cities in developing countries with a crisis is expanding informal settlement in them. these settlements with differences in definition are known as occupational, changing, marginal, self-made and uncontrolled housing. it is estimated that about 1 billion man in all over the world live in such kinds of places. these zones are the texture for creation ...

We numerically investigate terahertz (THz) pulse generation by linearly-polarized, two-color femtosecond laser pulses in highly-ionized argon. Major processes consist of tunneling photoionization and ponderomotive forces associated with transverse and longitudinal field excitations. By means of two-dimensional particle-in-cell (PIC) simulations, we reveal the importance of photocurrent mechanis...

This paper deals with a new class of image models called mosaic models that view an image as a random pattern and model it by an appropriate planar process. There are several different kinds of image models in use. Mandelbrot, [l] models irregular and fragmentary natural patterns by Brownian surfaces (Fig. 1). Wong [2], H assner [3], and others model images by two-dimensional random fields. Mat...

Abstract This research article examines the correctness of two new analytical methods for solving internal solitary waves shallow seas. To get computational solutions to positive (2 + 1)-dimensional Gardner–Kadomtsev–Petviashvili model, extended simplest equation and modified Kudryashov are used. Numerous traveling wave in various forms developed order assess starting conditions required variat...

Vertebrate Central Pattern Generators The central and peripheral nervous systems in vertebrates contain many types of central pattern generators (CPGs) that generate and control various rhythmic movements. These CPGs control many important functions, including different forms of locomotion, such as swimming, walking, running, and flying, and non-locomotor processes and behaviors, such as breath...

Fujifilm’s third generation full field digital mammography (FFDM) system, ASPIRE Cristalle, is based on Fujifilm’s unique and innovative technologies that achieve optimum image quality at very low patient dose. These outcomes are made possible by a new detector technology that uses a hexagonal close pattern (HCP) architecture, coupled with analytical and adaptive image processing that automatic...