An UML Project of a Task-Oriented Environment for Teaching Algorithms

This paper continues the author’s team research on development, implementation, and experimentation of a task-oriented environment for teaching and learning algorithms. This environment is a part of a large-scale environment for course teaching in different domains. The paper deals only with the UML project of the teaching team’s side of the environment.. The implementation of the project ideas is demonstrated on a WINDOWS-based environment’s prototype.

Workflow Modelling in Grid System for Satellite Data Processing

This paper focuses on a problem of Grid system decomposition by developing its object model. Unified Modelling Language (UML) is used as a formalization tool. This approach is motivated by the complexity of the system being analysed and the need for simulation model design.

An Approach to Representing the Process of Information Business Modeling

The compact and visualized documenting of information business modeling is a major prerequisite for comprehending its basic concepts, as well as for its effective application and improvement. The documenting of this process is related to its modeling. Thus, the process of information business modeling can be represented by its own tools. Being based on this thesis, the authors suggest an approach to representing the process of information business modeling. A profile for its documenting has been developed for the purpose.

Generalized Nets Model of an E-Learning System Software Architecture

The paper has been presented at the International Conference Pioneers of Bulgarian Mathematics, Dedicated to Nikola Obreshko ff and Lubomir Tschakaloff , Sofi a, July, 2006.

Automated Problem Domain Cognition Process in Information Systems Design

An automated cognitive approach for the design of Information Systems is presented. It is supposed to be used at the very beginning of the design process, between the stages of requirements determination and analysis, including the stage of analysis. In the context of the approach used either UML or ERD notations may be used for model representation. The approach provides the opportunity of using natural language text documents as a source of knowledge for automated problem domain model generation. It also simplifies the process of modelling by assisting the human user during the whole period of working upon the model (using UML or ERD notations).

Метамоделирование и Многоуровневые Метаданные как Основа Технологии Создания Адаптируемых Информационных Систем

Рассматриваются методы создания распределенных информационных систем, динамически настраиваемых на меняющиеся потребности пользователей и условия эксплуатации. Описываемые средства основаны на использовании многоуровневых моделей и метаданных, представляющих различные стороны функционирования систем на разных уровнях абстракции и с различных точек зрения. Основные уровни метаданных, описывающих систему: логический (описание объектов системы в терминах предметной области), физический (описание представления данных в базе данных) и презентационный (описание интерфейса пользователя системы). Модели и набор метаданных могут изменяться в процессе функционирования системы. На основе базовых моделей могут разрабатываться новые модели (в частности, созданы Web-модель, модели репортинга и бизнес-процессов). Представленный подход реализуется в CASE-технологии METAS, предназначенной для поддержания всего жизненного цикла адаптируемых систем. Функционирование системы строится на интерпретации построенных моделей. Возможности адаптации основаны на средствах реструктуризации данных, генерации и настройки пользовательского интерфейса, управления документами, подключения новых программных компонентов. В CASE-систему включены средства экспорта-импорта, реплицирования данных и моделей, интеграции с внешними системами, а также средства защиты. Разрабатываемые с использованием технологии информационные системы имеют клиент-серверную архитектуру. Технология METAS базируется на использовании языка UML и предметно-ориентированных языков для разработки моделей системы, описания бизнес-правил, специфических для конкретных предметных областей. Предусмотрены средства, позволяющие настраиваться на использование различных реляционных СУБД. Программная платформа – .NET.

Implementation of Genetic Algorithms for Transit Points Arrangement

The problem of transit points arrangement is presented in the paper. This issue is connected with accuracy of tariff distance calculation and it is the urgent problem at present. Was showed that standard method of tariff distance discovering is not optimal. The Genetic Algorithms are used in optimization problem resolution. The UML application class diagram and class content are showed. In the end the example of transit points arrangement is represented.

Review and Outlooks of the Means for Visualization of Syntax Semantics and Source Code. Procedural and Object Oriented Paradigm – Differences

In the article, we have reviewed the means for visualization of syntax, semantics and source code for programming languages which support procedural and/or object-oriented paradigm. It is examined how the structure of the source code of the structural and object-oriented programming styles has influenced different approaches for their teaching. We maintain a thesis valid for the object-oriented programming paradigm, which claims that the activities for design and programming of classes are done by the same specialist, and the training of this specialist should include design as well as programming skills and knowledge for modeling of abstract data structures. We put the question how a high level of abstraction in the object-oriented paradigm should be presented in simple model in the design stage, so the complexity in the programming stage stay low and be easily learnable. We give answer to this question, by building models using the UML notation, as we take a concrete example from the teaching practice including programming techniques for inheritance and polymorphism.