Studia Informatica


Volume: 2(11)
Year: 2008
Publishing: Publishing House of University of Podlasie
Scientific Editor: Andrzej Wisniewski
ISSN: 1731-2264

Contents

Barczak A., Stefaniuk M.,
Comparative analysis of e-procurement systems
pp. 5-13
Abstract: In the abstract have been described basic kinds of information systems of e-procurement type. Have been showed capabilities of their utilization and advantages and disadvantages of adopted solutions. Author started discerning analysis of systems from revealing the capabilities that systems carry along during realization of bids. On the occasion of the theme there were showed conditionings and directions of development of those systems. In the following chapters of the article have been appeared other forms of e-procurement. In the first place it has been described as a system supporting, in the broad sense of the term, process of supplies in the firm, afterwords have been given advantages of enlargement of interactions' spectrum on whole company. In the recap there were showed aspects confirming advisability of creating B2B systems, which support activity of operators in the time of market economy. In the second part of article have been showed aspects of modeling and implementation of systems under discussion. Author, step by step, will present factors, which are essential for creation of fully functional e-procurement service. Also descriptions of programming tools, used for building those applications, will be the part of aspects under consideration. Author will use a short comparison to show the best, in his opinion, tools and to present methods of their use in order to produce correctly implemented system.
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Barczak A., Sitkiewicz T.,
Review of traffic control algorithms in computer networks
pp. 15-26
Abstract: This paper presents comparison of popular traffic control algorithms in computer networks. It also contains descriptions of functioning of these algorithms. The first part of this paper contains description of evaluation criteria of traffic control algorithms (from system and user viewpoint). The second part of article contains description of new algorithms, which are theoretically improved or brand new, just introduced for practical use. These algorithms are developmental and eliminate disadvantages of already existing algorithms. The third part of this paper contains description of classical algorithms, which are well known, described and researched. It contains also propositions of modifications of classical linear programming algorithms. These modifications are for adjusting these algorithms to described problem.
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Barczak A., Rozbicki Ł.,
Review of advanced tools for creating web sites
pp. 27-35
Abstract: Present article shows characteristic of advanced tools which are used to create and to manage web sites. Their short characteristic will be introduced and some of them will be presented closer. Tools, which will be mentioned are mostly CMS (Content Management System) systems, that is systems available from common intenret web browsers. Tools that use WYSIWYG (What You See Is What You Get) editors will be also presented, so will be tools that are aplications installed on users workstations. Article finishes with attempt to show directions of development of CMS systems and with short summary related to presented tools.
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Seredynski F., Pilski M.,
Hyper-heuristics for power-aware routing protocols
pp. 37-47
Abstract: The idea underlying hyper-heuristics is to discover some combination of straightforward heuristics that performs very well across a whole range of problems. In this paper we describe genetic algorithm-based (GA) approach that learns such a heuristic combination for solving energy-efficient routing problem in mobile ad hoc networks (MANETs).
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