Dobrowolski, Grzegorz
Loading...
Email Address
Employee
aktywny
Alternative name
Dobrowolski, Grzegorz Tomasz
Discipline
informatyka
Author Profiles
Systemy AGH
9 results
Filters
Advanced Search
Filter by
Settings
Search Results
Now showing 1 - 9 of 9
Item type:Article, Access status: Open Access , Web pages content analysis using browser-based volunteer computing(Wydawnictwa AGH, 2013) Turek, Wojciech; Nawarecki, Edward; Dobrowolski, Grzegorz; Krupa, Tomasz; Majewski, PrzemysławExisting solutions to the problem of finding valuable information on the Web suffers from several limitations like simplified query languages, out-of-date in- formation or arbitrary results sorting. In this paper a different approach to this problem is described. It is based on the idea of distributed processing of Web pages content. To provide sufficient performance, the idea of browser-based volunteer computing is utilized, which requires the implementation of text processing algorithms in JavaScript. In this paper the architecture of Web pages content analysis system is presented, details concerning the implementation of the system and the text processing algorithms are described and test results are provided.Item type:Article, Access status: Open Access , Model checking processes specified in join-calculus algebra(Wydawnictwa AGH, 2014) Maludziński, Sławomir P.; Dobrowolski, GrzegorzThis article presents a model checking tool used to verify concurrent systems specified in join-calculus algebra. The temporal properties of systems under verification are expressed in CTL logic. Join-calculus algebra, with its operational semantics defined by a chemical abstract machine, serves as the basic method for the specification of concurrent systems and their synchronization mechanisms, allowing for the examination of more complex systems. The described model checker is a proof of concept for the utilization of new methodologies of formal system specification and verification in software engineering practice.Item type:Article, Access status: Open Access , CLUO: web-scale text mining system for open source intelligence purposes(Wydawnictwa AGH, 2013) Maciołek, Przemysław; Dobrowolski, GrzegorzThe amount of textual information published on the Internet is considered to be in billions of web pages, blog posts, comments, social media updates and others. Analyzing such quantities of data requires high level of distribution – both data and computing. This is especially true in case of complex algorithms, often used in text mining tasks. The paper presents a prototype implementation of CLUO – an Open Source Intelligence (OSINT) system, which extracts and analyzes significant quantities of openly available information.Item type:Article, Access status: Open Access , Oprogramowanie i integracja stanowiska do badania sygnałów akustycznych stanów przedawaryjnych maszyn elektrycznych(Wydawnictwa AGH, 2009) Głowacz, Adam; Dobrowolski, GrzegorzThe purpose of the work is to present software and integration of work station for investigation of acoustic signals of imminent failure conditions in electrical machines. The proposed approach allows you to specify the tasks of the system, followed by the construction of work station. The work station allows you to investigate different algorithms depending on considered electrical machine.Item type:Article, Access status: Open Access , A proposition of knowledge management methodology for the purpose of reasoning with the use of an upper-ontology(2007) Szymański, Kamil; Dobrowolski, Grzegorz; Koźlak, Jarosław; Zygmunt, AnnaThis article describes a proposition of knowledge organization for the purpose of reasoning using an upper-ontology. It presents a model of integrated ontologies architecture which consists of a domain ontologies layer with instances, a shared upper-ontology layer with additional rules and a layer of ontologies mapping concrete domain ontologies with the upper-ontology. Thanks to the upper-ontology, new facts were concluded from domain ontologies during the reasoning process. A practical realization proposition is given as well. It is based on some popular Semantic Web technologies and tools, such as OWL, SWRL, nRQL, Protege and Racer.Item type:Article, Access status: Open Access , Modelowanie anomalii i kryzysów w systemach zdecentralizowanych(Wydawnictwa AGH, 2007) Dobrowolski, Grzegorz; Koźlak, Jarosław; Nawarecki, EdwardIn this paper examples of the application of a multi-agent approach are given for modelling and the optimising of handling anomalies and crisis situations within the scope of supply chains and city traffic. The system for modelling supply chains takes into consideration auctions led among contractors and prestige parameter which describes the relationships among the pairs of companies. The system for modelling city traffic is based on the concept of cellular automaton and an algorithm of rotating discs responsible for the traffic lights configuration.Item type:Article, Access status: Open Access , Propozycja wysokoskalowalnej metody replikacji danych Theta dla rozproszonych systemów transakcyjnych(Wydawnictwa AGH, 2011) Kasper, Mirosław; Dobrowolski, GrzegorzThe aim of this paper is a proposition of the new replication method for distributed systems with large number of nodes, which is suitable for systems in which demand on high level of scalability is a key issue. The approach is designed for systems working in heterogeneous environments with various platforms, operating systems or database vendors. The article contains presentation of Theta method, description of the communication layer and system components, and presentation of transaction management for the proposed method.Item type:Article, Access status: Open Access , Współczesne metody systemowego wytwarzania oprogramowania(Wydawnictwa AGH, 2007) Dajda, Jacek; Dobrowolski, GrzegorzAgile methodologies are the response for disappointment with traditional software methods. By applying systems approach, it was possible to solve substantial problems of software engineering discipline, however the requirement of close proximity of project members was found a serious limitation. As a major percentage of software projects is developed by distributed teams nowadays, there is ongoing work aimed at supporting these teams in a context of agile methodologies.Item type:Article, Access status: Open Access , Sytuacje kryzysowe w systemach agentowych(Wydawnictwa AGH, 2005) Dobrowolski, Grzegorz; Nawarecki, EdwardPrzedstawiono formalizację opisu agenta i systemu agentowego, która może posłużyć do analizy działania systemu w warunkach sytuacji kryzysowych. Proponowane podejście umożliwia m.in. sprecyzowanie zadań systemu monitorującego działania systemu podmiotowego, a następnie stworzenie modelu symulującego jego działania w określonych sytuacjach kryzysowych. To z kolei pozwala na poszukiwanie strategii przeciwdziałania kryzysom lub przynajmniej - ograniczających ich skutki.