Design Pattern Instances within Model Driven Development Based on Abstraction, Concretization and Variability

The main goal of the paper is to present the method of design pattern support based on principles of model driven development: the abstraction, semantics and model transformations. More specifically, the method is based on the principle of suggestion of design pattern instances via the semantic marking of model elements or source code fragments and on the subsequent transformations of this way marked models or source code. Thanks to the continual support of the design patterns at more levels of abstraction and thanks to the transformations between particular model levels and source code, the method is targeted to achieve the applicability in the area of the iterative, incremental and model driven development

Report on the 6th ADBIS’2002 conference

The 6th East European Conference ADBIS 2002 was held on September~8--11, 2002 in Bratislava, Slovakia. It was organised by the Slovak University of Technology (and, in particular, its Faculty of Electrical Engineering and Information Technology) in Bratislava in co-operation with the ACM SIGMOD, the Moscow ACM SIGMOD Chapter, and Slovak Society for Computer Science. The call for papers attracted 115 submissions from 35~countries. The international program committee, consisting of 43 researchers from 21 countries, selected 25 full papers and 4 short papers for a monograph volume published by the Springer Verlag. Beside those 29 regular papers, the volume includes also 3 invited papers presented at the Conference as invited lectures. Additionally, 20 papers have been selected for the Research communications volume. The authors of accepted papers come from 22~countries of 4 continents, indicating the truly international recognition of the ADBIS conference series. The conference had 104 registered participants from 22~countries and included invited lectures, tutorials, and regular sessions. This report describes the goals of the conference and summarizes the issues discussed during the sessions

International Conference on Computer Systems and Technologies- CompSysTech ’ 06 Bee Hive Metaphor for Web Search

Abstract: A new approach to web search that is based on a bee hive metaphor is presented. We proposed a modified model of a bee hive. We have shown that the model is a true model of a bee hive in the sense it simulates several kinds of its typical behaviour. However, more importantly it is a simple model that describes some processes taking place in web search. Having performed several experiments, we have certain confidence the direction of research should be further explored. While we continue performing further experiments, we discuss various possible directions for future research, such as incorporating the concept of bee’s memory (including forgetting), or more generally incorporating impreciseness and uncertainty into the model. Other idea is to use the model not only for off line, but also for on line search and subsequent recommendations

Modeling Optimization Components for XML Processing

Abstract: Optimization techniques are often viewed as implementation tricks that lower various software quality criteria. We analyze pooling and caching techniques and we show models that are based on known design patterns and allow incorporating optimization into abstract system models. We discuss specialization and code generation methods that have potential to formally capture other optimization techniques exploiting modern, memory managed virtual machine environments. Bridging concept between both techniques is reducing object creation. We propose a model for XML-based service-oriented architecture with emphasis on Controller component. We show and measure a technique that, based on some restrictions, significantly improves XML document parsing in such environment. Key Words: modeling optimization, cache and pool components, XML processing