Computer World. Матросова Т.А. - 116 стр.

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115
engine is a challenging task. Search engines index tens to hundreds of millions of
web pages involving a comparable number of distinct terms. They answer tens of
millions of queries every day. Despite the importance of large-scale search engines
on the web, very little academic research has been done on them. Furthermore, due to
rapid advance in technology and web proliferation, creating a web search engine
today is very different from three years ago. This paper provides an in-depth
description of our large-scale web search engine – the first such detailed public
description we know of to date. Apart from the problems of scaling traditional search
techniques to data of this magnitude, there are new technical challenges involved
with using the additional information present in hypertext to produce better search
results. This paper addresses this question of how to build a practical large-scale
system which can exploit the additional information present in hypertext. Also we
look at the problem of how to effectively deal with uncontrolled hypertext collections
where anyone can publish anything they want.
Keywords
World Wide Web, Search Engines, Information Retrieval, PageRank. Google
Abstract 3
Java is great for downloading applications over a network, but what about for
embedded systems? The same features that lend themselves to networkability, fit well
in the process-control field, too. This applet demonstrates some real-time principles.
Abstract 4
This document describes an automatable mapping of specifications written in
the International Telecommunication Union (ITU) Specification and Description
Language (SDL) to specifications expressed in the Object Management Group
(OMG) standard United Modeling Language (UML). Such transformed specifications
preserve the general semantics of the original while allowing design teams to take
advantage of UML – a modeling language that is more widespread among software
practitioners than SDL and that enjoys more extensive tool support.
The proposed mapping is based on a proper subset of general UML that is
executable. This means that it produces executable models with dynamic semantics
that are equivalent to that of the original SDL specification. Furthermore, this subset
of UML allows generation of complete program code in a standard programming
language such as C or C++. Finally, this subset has the advantage that it currently
supported by a suite of tools available from Rational Software.
Abstract 5
For the past few years, a joint ISO/CCITT committee known as JPEG (Joint
Photographic Experts Group) has been working to establish the first international
compression standard for continuous-tone still images, both grayscale and color.
JPEG's proposed standard aims to be generic, to support a wide variety of
applications for continuous tone images. To meet the differing needs of many
applications, the JPEG standard includes two basic compression methods, each with

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